Space

Boeing's Starliner spacecraft will return to Earth today after undocking from the International Space Station without its crew. A livestream of the mission begins at 5:45 p.m. ET.

New simulations show that Jupiter's massive moon Ganymede was knocked off its axis when it was struck by a roughly 90-mile-wide asteroid around 4 billion years ago. The colossal collision was likely one of the biggest asteroid impacts the solar system has ever seen.

The moon hasn't had a magnetic field for 4.36 billion years. That means it could hold fragments of the ancient Earth.

September could be a prime time to see vibrant auroras, thanks to a quirk of Earth's tilt that leads to more intense geomagnetic activity around the equinox.

New James Webb Space Telescope results have revealed that there may not be a Hubble tension after all. But contradictions within the findings point to a deeper mystery.

A flowery passage in a 6,000-year-old Hindu text may be the earliest known reference to a solar eclipse, describing the sun as being "pierced" with darkness and gloom and proposing that evil beings had caused the sun's "magic arts to vanish."

On Wednesday (Sept. 4), astronomers spotted a never-before-seen asteroid, 2024 RW1, around eight hours before it entered Earth's atmosphere. The "harmless" space rock quickly burned up as predicted, creating a bright green streak across the night sky before spectacularly exploding.

A NASA spacecraft erected a large, foil solar sail in orbit around Earth last week, after a failed attempt days earlier. However, subsequent observations of the spacecraft show it is "tumbling or wobbling" through space, which may have also impacted its trajectory around our planet.

The average number of visible dark patches on the sun's surface in August was higher than any other month since September 2001. The final count was more than twice as high as experts initially predicted it would be.