Astronomers have found a fascinating new world that challenges our understanding of planetary systems. Using NASA's Transiting Exoplanet Survey Satellite (TESS), an international team of researchers has discovered TOI-2431 b, an Earth sized planet orbiting a nearby star just 117 light years away. What makes this discovery extraordinary isn't just the planet's size, it’s how incredibly fast it races around its star.
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Before These Clouds Form Stars, They Form A Complex Network of Filaments
The interstellar medium (ISM) is the gas and dust that's spread throughout the space between stars. It's mostly hydrogen, and its density ranges from extremely diffuse regions with few atoms, to massive, dense clouds of cold molecular hydrogen that spawn stars. In between those two extremes are different types of clouds, and those clouds are anything but uniform.
Scientists may have solved a chemistry mystery about Jupiter's ocean moon Europa
A long-standing mystery about the presence of hydrogen peroxide on Jupiter's icy ocean moon Europa may be closer to being solved.
Space Force's Golden Dome chief says space-based missile interceptors are possible today. 'We have proven every element of the physics'
The head of the Trump administration's Golden Dome program says the technologies needed to create such an ambitious space-based missile defense system already exist.
Webb Space Telescope Spies Baby Planetary System
Astronomers have found a baby system that’s just beginning to build planets — and it can tell us about how and where planet formation starts.
Interstellar invader Comet 3I/ATLAS is packed with water ice that could be older than Earth
Scientists have examined the interstellar invader 3I/ATLAS, finding evidence that it is packed with water that could be older than the solar system.
Ozzy Osbourne's journey through space, time and sci-fi: A Tribute to the 'Prince of Darkness'
A Space.com obituary for the ‘Prince of Darkness' Ozzy Osbourne.
How do scientists calculate the probability that an asteroid could hit Earth?
The 2024 YR4 asteroid may come close to Earth, but how do experts calculate this potential impact?
The Milky Way brightens the moonless summer sky this week: Here's where to look
Our galaxy will make for a particularly splendid sight on the dark nights surrounding the new moon phase on July 24.
This star escaped a supermassive black hole's violent grips — then returned for round 2
A death-defying star survived destruction by a ravenous supermassive black hole in a tidal disruption event, and came back to let the cosmic titan take another bite!
Rare sight from space: Snow dusts the dry Atacama Desert | Space photo of the day for July 23, 2025
The Atacama Desert in Chile recently received some snowfall, causing issues for the ALMA (Atacama Large Millimeter/submillimeter Array) telescope.
Sea-level monitoring satellite Sentinel-6B sets sail
The next sea-level monitoring satellite, Copernicus Sentinel-6B, has begun its journey from Europe to the Vandenberg Space Force Base in California, where it is scheduled to launch in November. Carefully packed into a climate-controlled container, the satellite is currently crossing the Atlantic Ocean aboard the cargo ship Industrial Dolphin.
Sharp-eyed US-Indian satellite set to launch July 30 to monitor Earth's surface, warn of natural disasters
NISAR, a joint mission of NASA and ISRO set to launch on July 30, will be able to see shifts in the landscape smaller than a centimeter to give warning of potential natural disasters.
Ignis Mission: Return to Earth
Video: 00:03:46
On 15 July 2025, with the splashdown of the Dragon capsule off the coast of California, the Ignis mission ended after a 20-day space journey. ESA project astronaut Sławosz Uznański-Wiśniewski from Poland, during nearly 230 orbits around Earth, completed about 120 hours of telework on the International Space Station and contributed to more than 20 experiments from his orbital office.
Watch: MetOp-SG-A1 and Sentinel-5 media briefing
With launch slated for August, the first MetOp Second Generation satellite, MetOp-SG-A1, which also carries the Copernicus Sentinel-5 mission, is currently undergoing final preparations for liftoff aboard an Ariane 6 rocket from Europe’s Spaceport in French Guiana.
The JWST Might Have Found the First Direct-Collapse Black Hole
Astrophysicists don't know if direct-collapse black holes are real. They were hypothesized to explain how the Universe could contain supermassive black holes (SMBH) so early. They don't require a stellar progenitor, nor do they require hierarchical merging. Instead, they collapse due to instability in a gas cloud, much like stars do.
Astronaut Fitness Gets a Boost with Adaptive Harness Design
What new exercise methods can be devised for astronauts in space under microgravity conditions? This is what a recent study conducted submitted to the 2025 Technology Collaboration Center’s (TCC) Wearables Workshop and University Challenge hopes to address as a team of Rice University engineering students developed a new type of space exercise harness that could make exercising under microgravity easier and more comfortable.
SpaceX launches 2 powerful internet satellites, lands rocket on ship at sea (video)
A SpaceX Falcon 9 rocket launched two of SES's O3b mPOWER communications satellites toward medium-Earth orbit today (July 22), then aced its landing on a ship at sea.
Thumbs Up for the Delta Aquariid Meteor Shower
Meteor-watchers will be busy this month and next. Not only are the Southern Delta Aquariids peaking soon, but they get a boost from additional minor showers.
This 200-light-year-wide structure could be feeding our galaxy's center: 'No one had any idea this cloud existed'
Astronomers have discovered a 200-light-year-wide Giant Molecular Cloud dubbed the Midpoint cloud that seems to be feeding star-building material to the heart of the Milky Way.
This Newborn Planet Is Carving Out A Home In Its Protoplanetary Disk
Around three decades ago, we weren't certain that other stars had planets orbiting them. Scientists naturally thought there would be, but they had no evidence. Now, not only do we know of more than 6,000 confirmed exoplanets, but we can watch as baby planets take shape around distant stars.
