Jupiter's volcanic moon Io doesn't appear to have a subsurface ... in the grip of Jupiter's gravitational field — Io moves around Jupiter on an eccentric orbit, and its distance from the giant ...

Mars has two moons, Phobos and Deimos. Scientists still debate whether these came from asteroids that passed close into Mars' ...

I pick out North America’s celestial highlights for the week ahead (which also apply to mid-northern latitudes in the ...

We knew data from Juno’s two very close flybys could give us some insights on how this tortured moon actually worked.” Io orbits around Jupiter, the largest planet in our solar system ...

Witness a lunar occultation of both Mars and the Pleiades; plus, Mars reaches opposition and Venus and Saturn sit close ...

In recent years, Saturn has overtaken Jupiter as the planet with the most satellites in our solar system. How many moons does Saturn have?

follows an elliptical orbit around Jupiter, and the variation in distances from Jupiter (and consequently of Jupiter’s gravitational pull) along this orbit constantly squeezes the moon ...

NASA develops miniature underwater robot to explore Jupiters icy moons NASAs innovation focuses on a compact submersible for ...

When it comes to finding alien life on other planets, most astrobiologists will tell you to “follow the water ...

As many as 400 volcanoes are erupting on the surface of Jupiter's innermost moon Io, with virtually every ... Jupiter's gravitational field — Io moves around Jupiter on an eccentric orbit ...