Mars will appear to make an ultraclose approach to the moon on Sunday, after Jupiter had a turn earlier this week. Here's how ...

A new volcanic hotspot on Jupiter’s moon Io has been detected, releasing six times Earth’s total energy output.

The rover's 26th sample, known as "Silver Mountain," has textures "unlike anything we've seen before," NASA says.

NASA officials said what Juno spotted was 'the most powerful volcanic event ever recorded on the most volcanic world in our ...