A distant gas giant the size of 10 Jupiters is now the first planet outside Earth's solar system to be mapped in three ...

The universe has quasi-moons, mini-moons, and moonlets, but no official definition of what counts as a moon.

This is a beautiful Lego space set, with approximate month and year positions of the earth's and moon's orbit around the sun and gives plenty of STEM stimulation at the same time. Size and distances ...

It's largely agreed that the moon was created around 4.5 billion years ago when a protoplanet collided with early molten ...

As mankind was planning the first moon landing in the 1960s, an asteroid approached Earth—and still hasn’t left.

The moon, Earth’s closest neighbor, is among the strangest planetary bodies in the solar system. Its orbit lies unusually far away from Earth, with a surprisingly large orbital tilt. Planetary ...

Over 4.6 billion years ago, Earth took shape from a spinning cloud of dust and gas surrounding the young sun. Tiny particles within this cloud collided and clumped together, driven by gravity and ...

Using advanced models, SwRI led new research that indicates that the formation of Pluto and Charon may parallel that of the Earth-Moon system. In the resulting “kiss-and-capture” regime, Pluto and ...

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 ...