NASA announced on Monday that Ingenuity's ninth flight was a success, as it undertook a "high-speed flight across unfriendly terrain." The Hill reports: Ingenuity flew for 166.4 seconds at a pace of 5 meters per second over a terrain of high slopes -- all new records for the helicopter. In preparation for the flight, NASA said, "First, we believe Ingenuity is ready for the challenge, based on the resilience and robustness demonstrated in our flights so far. Second, this high-risk, high-reward attempt fits perfectly within the goals of our current operational demonstration phase. A successful flight would be a powerful demonstration of the capability that an aerial vehicle (and only an aerial vehicle) can bring to bear in the context of Mars exploration -- traveling quickly across otherwise untraversable terrain while scouting for interesting science targets."

Tantalizing evidence has been uncovered for a mysterious population of "free-floating" planets, planets that may be alone in deep space, unbound to any host star. The results include four new discoveries that are consistent with planets of similar masses to Earth, published today in Monthly Notices of the Royal Astronomical Society. Phys.Org reports: The study, led by Iain McDonald of the University of Manchester, UK, (now based at the Open University, UK) used data obtained in 2016 during the K2 mission phase of NASA's Kepler Space Telescope. During this two-month campaign, Kepler monitored a crowded field of millions of stars near the center of our Galaxy every 30 minutes in order to find rare gravitational microlensing events. The study team found 27 short-duration candidate microlensing signals that varied over timescales of between an hour and 10 days. Many of these had been previously seen in data obtained simultaneously from the ground. However, the four shortest events are new discoveries that are consistent with planets of similar masses to Earth. These new events do not show an accompanying longer signal that might be expected from a host star, suggesting that these new events may be free-floating planets. Such planets may perhaps have originally formed around a host star before being ejected by the gravitational tug of other, heavier planets in the system. Confirming the existence and nature of free-floating planets will be a major focus for upcoming missions such as the NASA Nancy Grace Roman Space Telescope, and possibly the ESA Euclid mission, both of which will be optimized to look for microlensing signals.

Most people in the poorest countries will need to wait another two years before they are vaccinated against COVID-19, researchers have told Nature. From a report: Around 11 billion doses are needed to fully vaccinate 70% of the world's population against COVID-19. As of 4 July, 3.2 billion doses had been administered. At the current vaccination rate, this will increase to around six billion doses by the end of the year, researchers from the International Monetary Fund, based in Washington DC, project. But so far, more than 80% of the doses have gone to people in high-income and upper-middle-income countries. Only 1% of people in low-income countries have been given at least one dose, according to the website Our World in Data.

Last month, the leaders of the G7 group of wealthy nations pledged extra doses for low- and middle-income countries (LMICs) by the end of 2022, at a summit in Cornwall, UK. The centrepiece was a promise from US President Joe Biden to donate 500 million doses of the vaccine made by pharmaceutical company Pfizer of New York City and biotechnology company BioNTech in Mainz, Germany. This is in addition to 87.5 million previously pledged. The United Kingdom pledged 100 million, and France, Germany and Japan have pledged around 30 million each.

It's far from a done deal, but plans by European physicists to build a huge new gravitational wave observatory with a radical design received a boost last week. From a report: The European Strategy Forum on Research Infrastructures (ESFRI), which advises European governments on research priorities, added the $2.25 billion observatory, called the Einstein Telescope, to a road map of large science projects ripe for progress. Developers hope the move will give them the political validation needed to transform the Einstein Telescope idea into a project. "This isn't a promise of any funding, but it shows the clear intention to pursue this," says Harald Luck, a gravitational wave physicist at Leibniz University Hannover and the Max Planck Institute for Gravitational Physics and co-chair of the Einstein Telescope steering committee. âoeIt is more of a political commitment."

U.S. gravitational wave physicists welcomed the announcement, too, as they think it may bolster their plans to build a pair of detectors even bigger than the Einstein Telescope in a project called Cosmic Explorer. "In the U.S., I think the momentum is going to start to build," says David Reitze, executive director of the Laser Interferometer Gravitational-Wave Observatory (LIGO) and a physicist at the California Institute of Technology.

Endurance22 will launch early next year with aim of locating and surveying wreck in the Weddell Sea. From a report: The location of Sir Ernest Shackleton's Endurance has been one of the great maritime mysteries since the ship became trapped in ice and sank in 1915. Finding this symbol of the "heroic age" of polar exploration at the bottom of the Weddell Sea was long thought impossible because of the harshness of the Antarctic environment -- "the evil conditions," as Shackleton described them. Now a major scientific expedition, announced on Monday, is being planned with a mission to locate, survey and film the wreck. Endurance22 will launch early next year, in a vessel that will brave the most treacherous frozen waters, pounding its way through miles of pack ice. The effects of climate change will make the expedition a little less difficult, with melting ice easing the vessel's passage. An international team of scientists with expertise in the study of ice and climate will be onboard, advancing knowledge of the Antarctic environment.

Mensun Bound, its director of exploration, headed the 2019 search for the Endurance that had to be called off because of extreme weather conditions, after an underwater vehicle became trapped beneath the ice. He told the Guardian: "There's a complexity of emotions all swishing around within me. On the one hand, there's great excitement. On the other, for the last three years, I've had to carry this persistent sadness in me that we didn't find it last time. It's never far from my thoughts. That ship is always teasing my imagination." Bound said global warming in the Antarctic is "absolutely devastating," but that the melting ice "has improved our chances" of discovering the shipwreck.

India's CNN-News18 reports: [P]revious research has found that how cells pick a particular repair strategy can be influenced by the microgravity conditions in space. Scientists are concerned that DNA repairs influenced by microgravity conditions may not be adequate, and can lead to harmful consequences. To study the DNA repair process in space, scientists have developed a new technique that uses CRISPR/Cas9 — a gene-editing technology — to recreate precise damages so that cells can be observed repairing them. The team of researchers led by Sarah Stahl-Rommel has successfully demonstrated the technique and its viability aboard the International Space Station.
"CRISPR gene editing is no longer confined to Earth," reports Engadget: The new approach clears the way for other research around DNA repair in space. With enough work, the scientists hope they can replicate the genetic damage from ionizing radiation, not to mention other effects from long-term spaceflight. That, in turn, could help NASA and other agencies develop technology that shields astronauts and makes deep space exploration practical. There's a chance CRISPR might play an important role in getting humans to Mars and beyond.

For three weeks the "payload computer" has been down on NASA's Hubble Space Telescope, and "Without it, the instruments on board meant to snap pictures and collect data are not currently working," NPR recently reported. But as this weekend approached, NASA made an announcement...

NASA confirmed that there is a procedure for turning on the telescope's backup hardware, and that in the coming week it will first test those crucial procedures. (In the past week NASA has "completed preparations" for those tests.) After more than 30 years in space, "the telescope itself and science instruments remain healthy and in a safe configuration," NASA confirmed this week. But while they've now suspended new scientific observations, images already collected by the telescope are still being analyzed, reports Space.com — including one image with all the colors of the American flag released just before the holiday celebrating the country's founding as an independent nation: The Hubble Space Telescope has captured a dazzling view of a distant star cluster, one filled with stars that sparkle in red, white and blue, unveiled just in time for the Fourth of July U.S. holiday.

The photo, which NASA and the European Space Agency released July 2, shows the open star cluster NGC 330, a group of stars located about 180,000 light-years away in the Small Magellanic Cloud, a dwarf satellite galaxy to our own Milky Way, in the constellation Tucana, the Toucan... Astronomers used archived observations from Hubble's Wide Field Camera 3 in 2018 to create this image to support two different studies aimed at understanding how star clusters evolve and how large stars can grow before they explode as supernovas.

"The most stunning object in this image is actually the very small star cluster in the lower left corner of the image, surrounded by a nebula of ionised hydrogen (red) and dust (blue)," ESA officials said in a separate image description. " Named Galfor 1, the cluster was discovered in 2018 in Hubble's archival data, which was used to create this latest image from Hubble."
And today NASA also tweeted out an image of "the Fireworks Galaxy," the spiral galaxy Caldwell 12 with an unprecedented 10 supernovae observed since 1917.

"Thousands of disabled and elderly people in more than a dozen states have had to fight against decisions made by an algorithm to get the support services they need to remain in their homes instead of being institutionalized," reports the U.S. edition of the Guardian: The cuts have hit low-income seniors and people with disabilities in Pennsylvania, Iowa, New York, Maryland, New Jersey, Arkansas and other states, after algorithms became the arbiters of how their home health care was allocated — replacing judgments that used to be primarily made by nurses and social workers.

In Washington D.C., "on the worst end, we've had clients who actually died, because their services were cut and they were not receiving the care that they needed" Tina Smith Nelson, supervising attorney with AARP Legal Counsel for the Elderly, said about the effects of a new algorithmic system introduced in 2018. Over 300 seniors have had to file administrative appeals after their home care was cut by a new algorithmic system. "I think as a society we move into unsettling territory when we rely solely upon algorithms and data to make determinations about health care needs," Nelson said. "We reduce a person's humanity to a number...."

The situation is reflective of a reality increasingly affecting all users of American healthcare: algorithms — ranging from crude if-then charts to sophisticated artificial intelligence systems — are being deployed to make all sorts of decisions about who gets care. Government officials have touted algorithmic decision-making systems as a way to make sure that benefits are allocated even-handedly, eliminate human bias and root out fraud. But advocates say having computer programs decide how much help vulnerable people can get is often arbitrary — and in some cases downright cruel. The underlying problem, experts say, is that neither states nor the federal government provide enough funding to allow people needing health assistance to remain safely in their homes — even though these programs usually end up being much less costly than putting people in institutions. The algorithms resort to divvying up what crumbs are available...

Kevin De Liban, an attorney with Legal Aid of Arkansas, began fighting the cuts after severely disabled patients started calling "en masse" in 2016.... De Liban's legal team revealed flaws with the algorithm in court. It turned out, De Liban said, that the calculations had failed to factor in things like whether a patient had cerebral palsy or diabetes. A single point in the scoring system — for instance a point added because the patient had had a fever in the last three days or had open pressure sores — could make a huge difference in how many hours they received for the entire year... "As the algorithm worked, it was, to our eyes, pretty wildly irrational," said De Liban...

After years of court battles, Arkansas' use of the algorithmic system was finally thrown out in 2018... But across the nation, the battle continues. In Washington D.C., Pennsylvania and Iowa, legal services attorneys are plagued with calls from seniors complaining they have lost their care because of the algorithms recently adopted in those states.
The Guardian ultimately tracked down the designer of the algorithm, University of Michigan Professor Emeritus Brant Fries, who acknowledged that the system isn't even designed to calculate how many hours of care people actually need, but to try to allocate whatever scarce resources are available in the most equitable way.

"We're not saying that the size of the pie is correct... But whatever the money is there, I'm dividing it more equally!"

Pioneering pilot Wally Funk, who was denied being an astronaut because of her gender, is joining Amazon founder Jeff Bezos on an upcoming space voyage by his rocket startup, Blue Origin. Fortune reports: The nation's first female Federal Aviation Administration inspector, whose formal name is Mary Wallace Funk, will be an "honored guest" for the July 20 launch of the New Shepard rocket, Blue Origin said Thursday. At 82, Funk would be the oldest person to ever reach space, the company said, shattering the current record held by John Glenn, the astronaut-turned-senator who went into orbit at 77. Other New Shepard crew members include Bezos's brother Mark Bezos and a yet-to-be revealed auction winner who is paying $28 million to be an astronaut. Funk, an airline pilot and instructor, was a member of the "Mercury 13," a team of 13 American women who went through formal astronaut training in the early 1960s. Despite the intense preparation, the women were barred from becoming astronauts because of a then-NASA requirement to only accept military fighter pilots, a position held exclusively by men.

An anonymous reader shares a report: As early as 1958, the oil industry was hiring scientists and engineers to research the role that burning fossil fuels plays in global warming. The goal at the time was to help the major oil conglomerates understand how changes in the earth's atmosphere may affect the industry -- and their bottom line. But what top executives gained was an early preview of the climate crisis, decades before the issue reached public consciousness. What those scientists discovered -- and what the oil companies did with that information -- is at the heart of two dozen lawsuits attempting to hold the fossil fuel industry responsible for their role in climate change.

Many of those cases hinge on the industry's own internal documents that show how, 40 years ago, researchers predicted the rising global temperatures with stunning accuracy. But looking back, many of those same scientists say they were hardly whistleblowers out to take down big oil. Some researchers later testified before Congress, using their insider knowledge to highlight the ways in which the oil industry misled the public. Others say they have few qualms with how the petroleum giants handled their research. Few, however, could have predicted the imprint their work would have on history in efforts to hold the fossil fuel industry accountable for our climate emergency. The Guardian tracked down three of those scientists to see how they view their role today.

Fifty years later, physicists at MIT and elsewhere have now confirmed Hawking's area theorem for the first time, using observations of gravitational waves. Their results appear today in Physical Review Letters. MIT reports: A central law for black holes predicts that the area of their event horizons -- the boundary beyond which nothing can ever escape -- should never shrink. This law is Hawking's area theorem, named after physicist Stephen Hawking, who derived the theorem in 1971. In the study, the researchers take a closer look at GW150914, the first gravitational wave signal detected by the Laser Interferometer Gravitational-wave Observatory (LIGO), in 2015. The signal was a product of two inspiraling black holes that generated a new black hole, along with a huge amount of energy that rippled across space-time as gravitational waves. If Hawking's area theorem holds, then the horizon area of the new black hole should not be smaller than the total horizon area of its parent black holes. In the new study, the physicists reanalyzed the signal from GW150914 before and after the cosmic collision and found that indeed, the total event horizon area did not decrease after the merger -- a result that they report with 95 percent confidence. Their findings mark the first direct observational confirmation of Hawking's area theorem, which has been proven mathematically but never observed in nature until now. The team plans to test future gravitational-wave signals to see if they might further confirm Hawking's theorem or be a sign of new, law-bending physics.

An anonymous reader quotes a report from Axios: Virgin Galactic announced Thursday plans to launch its billionaire founder Richard Branson into space on July 11. The date is nine days before Jeff Bezos, founder of Virgin Galactic competitor Blue Origin, is set to take off for space. Branson will journey to space in Virgin Galactic's VSS Unity spacecraft along with two pilots and three other mission specialists as part of the company's fourth crewed mission. "After more than 16 years of research, engineering, and testing, Virgin Galactic stands at the vanguard of a new commercial space industry, which is set to open space to humankind and change the world for good," Branson said in a press release Thursday. "It's one thing to have a dream of making space more accessible to all; it's another for an incredible team to collectively turn that dream into reality," he added.

The highly contagious Delta variant is on the rise, and countries that hoped they had seen the worst of Covid-19 are being battered again. From a report: The nightmare is returning. In Indonesia, grave diggers are working into the night, as oxygen and vaccines are in short supply. In Europe, countries are slamming their doors shut once again, with quarantines and travel bans. In Bangladesh, urban garment workers fleeing an impending lockdown are almost assuredly seeding another coronavirus surge in their impoverished home villages. And in countries like South Korea and Israel that seemed to have largely vanquished the virus, new clusters of disease have proliferated. Chinese health officials announced on Monday that they would build a giant quarantine center with up to 5,000 rooms to hold international travelers. Australia has ordered millions to stay at home.

A year and a half since it began racing across the globe with exponential efficiency, the pandemic is on the rise again in vast stretches of the world, driven largely by the new variants, particularly the highly contagious Delta variant first identified in India. From Africa to Asia, countries are suffering from record Covid-19 caseloads and deaths, even as wealthier nations with high vaccination rates have let their guard down, dispensing with mask mandates and reveling in life edging back toward normalcy. Scientists believe the Delta variant may be twice as transmissible as the original coronavirus, and its potential to infect some partially vaccinated people has alarmed public health officials.

A wireless pacemaker that can dissolve in the body has been created for patients who need only temporary help to regulate their heartbeat. The Guardian reports: While pacemakers can already be used for temporary periods, experts say there are problems, including that leads placed through the skin can pose an infection risk. The external power supply and control system can become accidentally dislodged, and heart tissue can be damaged when the device is removed. Now researchers say they have developed a battery-free pacemaker that can be implanted directly on to the surface of the heart and absorbed by the body when no longer needed. The device -- which Rogers said would cost about $100 -- is free of leads and can be controlled and programmed from outside the body.

Writing in the journal Nature Biotechnology, Rogers and colleagues report how they made the device -- which is thin, flexible and weighs less than half a gram -- from materials including magnesium, tungsten, silicon and a polymer known as PLGA, all of which are compatible with the body but which undergo chemical reactions that allow them to dissolve and be absorbed over time. The device, which resembles a tiny tennis racket in shape, is powered by wireless technology in which radio frequency power from an external device is sent to a receiver within the pacemaker where it is converted into an electrical current that is used to regulate the heart. Rogers said similar technology was used in applications such as wireless charging of smartphones and electric toothbrushes.

Earlier today at around 11:45 AM EDT, Virgin Orbit successfully launched its first commercial satellites from their LauncherOne rocket, which blasted off from beneath the wing of a Boeing 747. TechCrunch reports: On board, Virgin Orbit carried seven payloads, including the first-ever defense satellite for the Netherlands, as well as cubsats developed by the U.S. Department of Defense for its Rapid Agile Launch initiative. The initiative is seeking to test the viability of flying small spacecraft to space on relatively short notice on launch platforms with increased flexibility, which Virgin Orbit's provides thanks to its ability to take off horizontally from more or less conventional runways. Virgin Orbit also carried two Earth observation satellites for Polish startup SatRevolution, and it will be delivering more in future flights to help build out that company's planned 14-spacecraft constellation.

In January, Virgin Orbit completed its final demonstration mission, reaching orbit for the first time with LauncherOne. That paved the way for this mission, and the company plans to increase the pace and frequency of its commercial missions, with at least one more planned tentatively for later this year and many more in 2022. In terms of payload capacity, Virgin Orbit's Launcher One can carry around 1,100 pounds to low Earth orbit, which compares favorably with the capacity of Rocket Lab's Electron, which can carry around 661 pounds to the same destination.

A team of researchers from Spain, France and the U.S. has found evidence of a glauconitic-like clay on Mars that suggests the planet once had habitable conditions. Phys.Org reports: In their paper published in the journal Nature Astronomy, the group describes their study of clay minerals extracted from Gale Crater by Curiosity rover back in 2016 and what they found. Back in 2016, NASA's Curiosity rover drilled into the Martian surface inside of Gale Crater. The rover then extracted samples of the clay minerals and used its instruments to analyze the material. In this new effort, the researchers have taken a close look at the results of the analysis and found that it very closely resembles glauconitic clays here on Earth.

Glauconite is an iron potassium phyllosilicate mineral. It is almost always found as ovoid shapes in sediment beds, carbonates and sandstones -- formation requires stable conditions over a long period. This is what makes the discovery of a similar clay on Mars so exciting -- it suggests that it likely formed under stable conditions for a long time, perhaps millions of years. And that suggests that for at least one part of Mars, conditions were, to some extent, suitable for life over millions of years. [...] The researchers note that their findings are not evidence of life on Mars, but suggest that there was a time during which conditions on the surface were favorable for its presence.

The amount of water in the atmosphere of Venus is so low that even the most drought-tolerant of Earth's microbes wouldn't be able to survive there, a new study has found. However, the researchers looked at data from other planets too and found that the clouds of Jupiter do provide sufficient water activity to theoretically support life. Space.com reports: The new study looked at measurements from probes that flew through the atmosphere of Venus and acquired data about temperature, humidity and pressure in the thick sulphuric acid clouds surrounding the planet. From these values, the scientists were able to calculate the so-called water activity, the water vapor pressure inside the individual molecules in the clouds, which is one of the limiting factors for the existence of life on Earth. The findings are likely a disappointment for the Venus research community, which was invigorated last September by the discovery of phosphine, a compound made of atoms of phosphorus and hydrogen that on Earth can be associated with living organisms, in Venus' atmosphere. At that time, researchers suggested the phosphines may be produced by microorganisms residing in those clouds. On Earth [...] microorganisms can survive and proliferate in droplets of water in the atmosphere when temperatures allow. However, the findings of the new study, based on data from several Venus probes, leave zero chance of anything living in the clouds of Venus [...].

However, the researchers looked at data from other planets too and found that the clouds of Jupiter do provide sufficient water activity to theoretically support life. Data collected by the Galileo probe at altitudes between 26 and 42 miles (42 and 68 kilometers) above the surface of the gas giant suggest the water activity value to sit at 0.585, just above the survivable threshold. Temperatures in this region are also just about survivable, at around minus 40 degrees F. High levels of ultraviolet radiation or lack of nutrients could, however, prevent that potential life from thriving, the researchers said, and completely new measurements would be needed to find whether it actually could be there or not.

In January last year, astronomers definitively observed, for the first time, a black hole swallowing a dead star, like a raven devouring roadkill. Then 10 days later, they saw the same act of scavenging happen again in a different, distant sector of the cosmos. From a report: Those triumphs, reported in a paper published on Tuesday in Astrophysical Journal Letters, are the latest in the still nascent field of gravitational astronomy, which is detecting the literal stretching and scrunching of space-time caused by some of the most cataclysmic events in the universe. "It's the first time that we've actually been able to detect a neutron star and a black hole colliding with each other anywhere in the universe," said Patrick Brady, a professor of physics at the University of Wisconsin-Milwaukee who serves as the spokesman for the LIGO Scientific Collaboration. Further reading: For the first time, astronomers see a black hole eating a neutron star.

An anonymous reader quotes a report from Scientific American: Behold the highest-resolution image of atoms ever seen. Cornell University researchers captured a sample from a crystal in three dimensions and magnified it 100 million times, doubling the resolution that earned the same scientists a Guinness World Record in 2018. Their work could help develop materials for designing more powerful and efficient phones, computers and other electronics, as well as longer-lasting batteries. The researchers obtained the image using a technique called electron ptychography. It involves shooting a beam of electrons, about a billion of them per second, at a target material. The beam moves infinitesimally as the electrons are fired, so they hit the sample from slightly different angles each time -- sometimes they pass through cleanly, and other times they hit atoms and bounce around inside the sample on their way out. Cornell physicist David Muller, whose team conducted the recent study, likens the technique to playing dodgeball against opponents who are standing in the dark. The dodgeballs are electrons, and the targets are individual atoms. Though Muller cannot see the targets, he can see where the "dodgeballs" end up, thanks to advanced detectors. Based on the speckle pattern generated by billions of electrons, machine-learning algorithms can calculate where the atoms were in the sample and what their shapes might be.

Previously, electron ptychography had only been used to image extremely flat samples: those merely one to a few atoms thick. The new study, published in Science, now allows it to capture multiple layers tens to hundreds of atoms thick. That makes the technique much more relevant to materials scientists, who typically study the properties of samples with a thickness of about 30 to 50 nanometers. (That range is smaller than the length your fingernails grow in a minute but many times thicker than what electron ptychography could image in the past.) "They can actually look at stacks of atoms now, so it's amazing," says Andrew Maiden, an engineer at the University of Sheffield in England, who helped develop ptychography but was not involved with the new study. "The resolution is just staggering."

New findings from a team using the international Gemini Observatory and the WIYN 3.5-meter Telescope at Kitt Peak National Observatory suggest that Earth-sized worlds could be lurking undiscovered in binary star systems, hidden in the glare of their parent stars. As roughly half of all stars are in binary systems, this means that astronomers could be missing many Earth-sized worlds. Phys.Org reports: Earth-sized planets may be much more common than previously realized. Astronomers working at NASA Ames Research Center have used the twin telescopes of the international Gemini Observatory, a Program of NSF's NOIRLab, to determine that many planet-hosting stars identified by NASA's TESS exoplanet-hunting mission are actually pairs of starsâ"known as binary starsâ"where the planets orbit one of the stars in the pair. After examining these binary stars, the team has concluded that Earth-sized planets in many two-star systems might be going unnoticed by transit searches like TESS's, which look for changes in the light from a star when a planet passes in front of it. The light from the second star makes it more difficult to detect the changes in the host star's light when the planet transits.

Using the 'Alopeke and Zorro instruments on the Gemini North and South telescopes in Chile and Hawai'i, respectively, the team observed hundreds of nearby stars that TESS had identified as potential exoplanet hosts. They discovered that 73 of these stars are really binary star systems that had appeared as single points of light until observed at higher resolution with Gemini. "With the Gemini Observatory's 8.1-meter telescopes, we obtained extremely high-resolution images of exoplanet host stars and detected stellar companions at very small separations," said Katie Lester of NASA's Ames Research Center, who led this work. Lester's team also studied an additional 18 binary stars previously found among the TESS exoplanet hosts using the NN-EXPLORE Exoplanet and Stellar Speckle Imager (NESSI) on the WIYN 3.5-meter Telescope at Kitt Peak National Observatory, also a Program of NSF's NOIRLab.

After identifying the binary stars, the team compared the sizes of the detected planets in the binary star systems to those in single-star systems. They realized that the TESS spacecraft found both large and small exoplanets orbiting single stars, but only large planets in binary systems. These results imply that a population of Earth-sized planets could be lurking in binary systems and going undetected using the transit method employed by TESS and many other planet-hunting telescopes. Some scientists had suspected that transit searches might be missing small planets in binary systems, but the new study provides observational support to back it up and shows which sizes of exoplanets are affected. The researchers report their findings in a paper via arXiv.