Four ISS crewmembers were brought home a month early due to an undisclosed but non-emergency "medical concern".
Young stars need time to grow into their final masses before they begin fusing lighter elements into heavier elements as main-sequence stars. They can spend hundreds of thousands of years as protostars, when they're still accreting mass from the molecular clouds they form in. But even though they haven't begun fusion, they still inject energy into their surroundings.
Auroras may be visible from Alaska to New York tonight as an incoming stream of speedy solar wind sets the stage for some potentially dazzling northern lights.
The mission patch symbolizing the National Reconnaissance Office’s proliferated architecture satellite constellation. Graphic: NRO
SpaceX is preparing for a late night Falcon 9 launch from Vandenberg Space Force Base on Friday, which will carry an undisclosed number of intelligence-gathering satellites for the National Reconnaissance Office.
Friday, Jan. 16, 2026: See our latest news and updates on NASA's Artemis 2 moon rocket rollout to the launch pad.
From Orion's glowing nebula to the sparkling Pleiades, these winter targets reward anyone willing to brave the cold.
Jupiter harbors more oxygen than the sun, a new study finds, giving astronomers a crucial clue about how our solar system's planets formed.
As we prepare for missions beyond Earth orbit, one crucial challenge remains: keeping astronauts healthy in microgravity. Without daily exercise, their muscles, bones and cardiovascular systems weaken, which could impact mission success and astronaut safety, especially in destinations such as the Moon or Mars, where crew will have to operate autonomously immediately after landing.
Ba-by stars, doo doo doo doo doo doo.
MAVEN was built to last in orbit until 2030 — that's not looking likely anymore.
Additive Manufacturing, more commonly known as 3D printing, will be an absolutely critical technology for any long-term settlement on another world. Its ability to take a generic input, such as plastic strips or metal powder, and turn it into any shape of tool an astronaut will need is an absolute game changer. But the chemistry behind these technologies is complicated, and their applications are extremely varied, ranging from creating bricks for settlements to plastics for everything from cups to toothbrush holders. A new paper available in pre-print on arXiv from Zane Mebruer and Wan Shou of the University of Arkansas, explores one specific aspect of a particularly important type of 3D printing, and realized that they could save millions of dollars on Mars missions by simply using the planet’s atmosphere to help print metal parts.
3I/ATLAS is heading away from the sun on an escape trajectory from our solar system.
This winter the biggest planet is the brightest. The brightest star pins the Winter Triangle. And did you know Capella and Rigel march in step?
Image: This Copernicus Sentinel-2 image over the South Atlantic Ocean features a close-up view of the A23a iceberg, once the world’s largest. The unusually cloud-free image shows the first signs that the iceberg will soon disintegrate completely.
Between February and April of this year, NASA will conduct its first crewed mission beyond Low Earth Orbit (LEO) in over fifty years. At 09:41 p.m. EDT (06:41 p.m. PDT), the Artemis II crew will launch aboard their Orion spacecraft atop the Space Launch System (SLS) from Launch Pad-39B at the Kennedy Space Center in Florida. With the launch date rapidly approaching, NASA is entering the final stages of preparation, including the rollout of the SLS and Orion to the launch pad for the first time. This will be followed by the final integration and testing of the rocket and spacecraft, then launch rehearsals.
Antarctica's subglacial bedrock was previously one of the least-mapped planetary surfaces in our solar system.
SETI@home has been one of the largest citizen science projects ever, with millions of users around the world.
It's apparently never too early to start the MCU hype machine rolling!
One of the most consequential events—maybe the most consequential one throughout all of Earth's long, 4.5 billion year history—was the Great Oxygenation Event (GOE). When photosynthetic cyanobacteria arose on Earth, they released oxygen as a metabolic byproduct. During the GOE, which began around 2.3 billion years ago, free oxygen began to slowly accumulate in the atmosphere.
A recent string of cyberattacks against the European Space Agency is just the tip of the iceberg, a researcher said, claiming that email credentials of ESA employees are regularly leaked online.
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