outer space

Moonrise from aboard the International Space Station, August 3, 2017.

What happened to the moon’s magnetic field?

Science

Unlike Earth, the moon doesn’t have a magnetic field — but it did billions of years ago. What happened?

What happened to the moon’s magnetic field?
A screen shot from Abel Méndez's lab note titled "Strange Signals from the Nearby Red Dwarf Star Ross 128."

Astronomers try to decipher 'peculiar signals' from nearby star Ross 128

Science
Astronomers try to decipher 'peculiar signals' from nearby star Ross 128
French astronaut Thomas Pesquet on his first spacewalk on Jan. 13.

French and US astronauts spacewalk for space station repairs

Science
French and US astronauts spacewalk for space station repairs
Galaxies

Astronomers report there are 2 trillion galaxies in the 'observable' universe

Education
Astronomers report there are 2 trillion galaxies in the 'observable' universe
An artist's impression of ESA's Rosetta approaching comet 67P/Churyumov-Gerasimenko. The comet image was taken on August 2, 2014, by the spacecraft's navigation camera at a distance of about 500 km. The spacecraft and comet are not to scale.

Scientists prepare for a historic landing on a 'seething and sputtering and spitting' comet

Science
Scientists prepare for a historic landing on a 'seething and sputtering and spitting' comet