In the early 1600s, Dutch spectacle maker Jan Lippershey discovered that combining lenses could magnify distant objects.

For over four billion years, the Moon has been orbiting Earth — but where did it come from? The Moon has been a constant ...

ESA's Mars Express orbiter captured footage of the Mars' moon Deimos pass in front of Ganymede, Europa, Jupiter, Io and ...

During the red giant phase, both the Sun and Jupiter will shine brighter and become hotter. However, its moon Europa is ...

Text and photos by Michael J. Meyer Anyone who has visited Ocracoke Island knows how special it is: from stunning sunsets to magnificent views of the Milky Way on a moonless night after a cold ...

Recent flybys of the fiery world refute a leading theory of its inner structure—and reveal how little is understood about ...

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. Credit: NASA/JPL-Caltech/SwRI/MSSS | ...

Earth’s companion has allowed astronomers to define lunar cycles, navigate without technology, and understand celestial ...

Scientists using NASA's Hubble Space Telescope went looking for evidence of one phenomenon and found quite another.

The solar system’s largest and smallest planets meet in the evening sky, standing 2° apart shortly after sunset.

Enjoy a close conjunction of the solar system’s smallest and largest planet just days before the Full Strawberry Moon this ...

The icy surface of Europa, one of Jupiter's moons, has captured scientists' attention. Compounds like carbon dioxide and salt have been detected there, suggesting that an ocean could be ...