Rocky bodies called protoplanets were thought to have formed slightly earlier in the inner solar system than those beyond the ...

An object dubbed 3I/ATLAS is only the third interloper from outside the Solar System seen in all of human history.

The European Space Agency said Wednesday that scientists have discovered what might be only the third known interstellar ...

A new investigation into old Kepler data has revealed that a planetary system once thought to house zero planets actually has ...

NASA has discovered the third known interstellar object to pass through our solar system, but the icy snowball object poses ...

Astronomers have discovered the strange dance that leads to the creation of rare "double hot Jupiters" in binary star systems ...

The Hubble Space Telescope time-lapse captured footage of Jupiter, Saturn, Uranus and Neptune. Credit: SCIENCE: NASA, ESA, ...

NASA's Juno spacecraft made a close flyby of Jupiter moon lo. See an animation of the images the probe captured created by Koji Kuramura and Gerald Eichstädt.

Our solar system today has eight planets. Till a few years back, Pluto was our ninth planet, until it was demoted to a dwarf planet. But some studies suggest that the ancient solar system once still ...

Mercury This season starts with the littlest planet descending into the glow of sunset and quickly getting washed from view on the way to inferior conjunction on April 11. It rises in the predawn sky ...

A powerful solar outburst on May 31 caused a rare severe geomagnetic storm warning. Scientists used real-time space-based tools to track the CME, underscoring the risks it poses to satellites and ...

Researchers armed with the Hubble Space Telescope have revealed that some of Uranus' largest moons have one side brighter than the other — but not the side they were expecting.