Large galaxies, like the Milky Way, attract smaller galaxies. Our solar system's cosmic neighborhood spans 100,000 ...

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We're showing that, everywhere we look now, there was some sort of magnetic field that was responsible for bringing mass to ...

Why does Jupiter look like it has a surface – even though it doesn’t have one? – Sejal, age 7, Bangalore, India ...

The movements of the planets in the Solar System are pretty difficult to get your head around, even before we get started on ...

A value called Bz indicates how far south the solar wind's magnetic field is pointing, which can predict how likely the northern lights are to occur.

Saturn will undergo a drastic change in the coming months, at least as the planet is seen from Earth. Here's what's going to ...

Moons are locked in orbit around planets. Planets, asteroids and comets orbit more massive stars, and stars collect around supermassive black holes, forming galaxies. The count is continually ...

After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the ...

An international team led by researchers in Japan and Europe has discovered a new multi-planet system around a Sun-like star, ...

In the time Pluto was found, classified as a planet and reclassified as a dwarf planet, it has not completed one orbit. One ...