These moonless evening offer the winter Milky Way arching high over the world. And, when will Betelgeuse stand straight over Sirius for you?
This is Part 4 in a series on the physics of free will. Check out Parts 1, 2, and 3.
These moonless evening offer the winter Milky Way arching high over the world. And, when will Betelgeuse stand straight over Sirius for you?
Crew 11 during training before launch last August (left to right): Cosmonaut Oleg Platonov, NASA astronaut Mike Fincke, Crew 11 commander Zena Cardman and Japanese astronaut Kimiya Yui. Image: NASA
Four space station fliers have been told to cut their mission short and return to Earth ahead of schedule because of an apparently serious medical issue affecting an unidentified crew member, NASA announced Thursday.
NASA has decided to bring the four astronauts of SpaceX's Crew-11 mission home from the International Space Station early due to a medical issue experienced by a crewmember in orbit.
"Nothing in my professional training as an X-ray astronomer had prepared me for something like this."
Mars has a curious past. Rovers have shown unequivocal evidence that liquid water existed on its surface, for probably at least 100 years. But climate models haven’t come up with how exactly that happened with what we currently understand about what the Martian climate was like back then. A new paper, published in the journal AGU Advances by Eleanor Moreland, a graduate student at Rice University, and her co-authors, has a potential explanation for what might have happened - liquid lakes on the Red Planet would have hid under small, seasonal ice sheets similar to the way they do in Antarctica on Earth.
Your guide to February's full Snow Moon, from peak times to skywatching highlights.
NASA just postponed a spacewalk because of a medical concern with an astronaut. Here's how the agency has handled such issues in the past.
Astronomers discovered a cloud of hydrogen gas that’s devoid of stars. Held together by an invisible halo of dark matter, the starless cloud may elucidate its nature.
The Vera Rubin Observatory has found 19 new "superfast rotator" asteroids, including the fastest-spinning big space rock ever found.
It looks like NASA's Mars Sample Return (MSR) mission has come to a bureaucratic end. The mission was to be the crowning achievement in the study of Mars and all the questions surrounding its ancient habitability. But the US Congress has drastically cut the mission's funding.
Auroras may be visible from Alaska to New York as incoming coronal mass ejections and high-speed solar winds could trigger geomagnetic storms tonight.
Gerard Butler and Morena Baccarin return in an epic sci-fi survival sequel to 2020's surprise hit, "Greenland".
"We're going to do it in three years, and we're going to do it for a ridiculously low price."
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Solar system comets are often at their brightest as they draw close to the sun
Observers across America may witness a special transit and shadow event of Jupiter’s moon on opposition day.
Both NASA’s James Webb Space Telescope and Chandra X-ray Observatory caught these two galaxies in a close embrace.
Video: 01:30:00
Josef Aschbacher, Director General of the European Space Agency, briefed journalists on the main milestones for 2026, such as the launch of Smile, a mission that will give humankind its first complete look at how Earth reacts to streams of particles and bursts of radiation from the Sun. Later in 2026 should also see the arrival of BepiColombo at Mercury after its eight-year trip, where it will gather data to answer many perplexing questions about the least-explored planet of the inner Solar System. Many more exciting missions are expected, with ESA astronaut Sophie Adenot launching for the International Space Station, and various Earth Observation and Navigation launches from Europe’s Spaceport in French Guiana.
"This was many times more energetic than any similar event and more than any known explosion powered by the collapse of a star."
Video: 00:06:21
As a new year begins, let’s take a look at what’s ahead for the European Space Agency in 2026. From Earth to the farthest reaches of the Solar System, 2026 marks a year of firsts that continue to shape the future of space.
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