Io, one of Jupiter's Galilean satellites, is the most volcanically active body in the solar system. Images from spacecraft ...

Jupiter and Mars appeared closer together than they've been in over two years. Here are some of the best photos of this rare ...

Two of Earth's planetary neighbors are expected to look very close in the night sky, and it will likely be a while before ...

So, when can we visit Mars already? Come on, Elon. Number 16. How Maya, the tumbling cigar moon? We've only just begun to ...

The encounter is an out-of-this-world example of right place, right time — as Mars zips past Jupiter, Earth will be in the perfect spot to see the two planets look as if they are within arm's reach.

Early risers get a double sky treat: a Mars and Jupiter conjunction and the Perseid meteor shower will occur at once ...

He directed a team of engineers that built Spirit, Opportunity and Curiosity, mobile robots that offered astonishing glimpses ...

Look east before dawn on Wednesday, Aug. 14, to see the giant planet and the Red Planet just a third of a degree from one another in a rare planetary conjunction.

See a conjunction of the Moon and Venus, catch Psyche and Iris at opposition, and watch Jupiter’s Galilean moons dance in the ...

It's almost Science Week, which means it's time to ask Australia an important question: What's filled you with awe in the ...

Annual record-setting in the climate crisis is becoming the new normal. This year is on pace to be the hottest ever recorded.

Jupiter's four largest MOONs are Io, Europa, Ganymede, and Callisto. These moons were discovered in 1610 by Galileo Galilei ...