This artist’s rendering made available by NASA on Thursday, July 23, 2015 shows a comparison between the Earth, left, and the planet Kepler-452b. It is the first near-Earth-size planet orbiting in the ...

This is a montage of Hubble Space Telescope views of our solar system's four giant outer planets: Jupiter, Saturn, Uranus, and Neptune, each shown in enhanced color. The images were taken over nearly ...

This artist’s concept depicts the NISAR satellite in orbit over central and Northern California. The spacecraft will survey all of Earth’s land and ice-covered surfaces twice every 12 days.

If you have any doubt that the planets move in a noticeable manner across the starry dome, then examine the late June and July skies nightly. For the next six weeks, Venus chases Mars, while Mars ...

New techniques for analyzing decade-old images from the Hubble Space Telescope are helping astronomers track planets that went undiscovered at the time. So far, the techniques have confirmed the ...

Ancient Babylonians charted Jupiter’s heavenly motion in a surprisingly modern, mathematically abstract way — a feat that until now was thought to have originated among European scholars who lived ...