NPR's Scott Detrow talks with Regina Barber and Nell Greenfieldboyce about the Artemis moon missions, the "seismic quiet" during a solar eclipse, and the origins of a mysterious interstellar visitor.

Astronomers analyzed the vapors coming off the comet when it neared the sun and found it had a lot of "heavy" water. That ...

Scientists studying 3I/ATLAS have detected unusually high levels of heavy water, indicating it formed in an extremely cold ...

Astronomers have peered into water vapor released by 3I/ATLAS and discovered key clues about its home star system.

Measurements of this interstellar comet’s molecular makeup show an excess of heavy water molecules that is dramatically ...

The comet that rambled past us from another star last year likely originated in a cold, isolated corner of the galaxy that ...

The interplanetary comet 3I/ATLAS is remarkably rich in a specific type of water that contains deuterium, meaning it came ...

Usually, comets are dormant blocks of rock and ice. They only wake up when they get close to a star. The intense heat causes ...

With all the things going on here on Earth, but also in the immediate space that surrounds it, humanity seems to have forgotten all about a comet that sparked intense controversy not long ago. But now ...

NASA Administrator Jared Isaacman said the success of the historic Artemis II mission currently underway would not be possible "if it wasn't for President Trump," as the Orion spacecraft is set to ...

An assessment published this week on the isotopic composition of interstellar comet 3I/ATLAS suggests an intriguing possibility: The comet may be between 10 and 12 billion years old, making it roughly ...