"This is the first time we've ever seen a thing like this on any outer world." A massive solar windstorm in 2017 compressed Jupiter's magnetosphere "like a giant squash ball," a new study reports.

Experts are not sure why Neptune's auroras can be seen around the planet's "mid-latitudes," and not the north and south poles ...

Io is an incredibly active and extreme place, with glistening lava lakes and volcanic eruptions shooting sulfur and magma to ...

Neptune lies in the frigid, dark, vast frontier of the outer edges of our solar system, about 3 billion miles away from the ...