Stargazers in Ireland will have the opportunity to witness ‘one of the most spectacular events’ of the year this weekend. The ...

Jupiter's moon Io stands alone among the solar system's moons. It has more than 400 active volcanoes, and its surface is home ...

In the eastern morning sky, Venus is being swallowed by the rising sun’s glare. Taking Venus’s place this month is Arcturus, ...

Turn a telescope to the eastern sky in the hours following midnight on Nov. 5 to see two colossal shadows darken the cloud ...

The Earth's Moon is its only one, but scientists recently discovered a new celestial body that will be staying near the planet for the next several decades.

In the eastern morning sky, Venus is being swallowed by the rising sun’s glare. Taking Venus’s place this month is Arcturus, the brilliant star in kite-shaped Bootes, the herdsman. Meanwhile, Jupiter ...

Jupiter native Kellie Gerardi became the 90th woman to visit ... Delta,” to her daughter Delta Victoria — named after the ...

The Earth often gets a few visitors in the solar system, but some stick around for a while. Here's what to know about the 'quasi-moon.' ...

Be sure to look up for one of October's most beautiful sky pairings Cheng Xin/Getty On Monday, Oct. 13, into early Tuesday, Oct. 14, the moon and Jupiter will appear side by side just before midnight ...

Jupiter’s moon Ganymede could be a vast dark matter detector, and upcoming space missions might be able to spot distinctive dark matter craters on its ancient surface. Physicists searching for dark ...

The predawn hours of Aug. 8 present a perfect opportunity to see Jupiter's four largest moons line up next to the "King of the Planets" as it voyages through the stars of the constellation Gemini.