Shocking results of galaxy-cluster collisions

A giant collision of several galaxy clusters, each containing hundreds of galaxies, has produced this spectacular panorama of shocks and energy. The collisions generated shock waves that set off a celestial fireworks display ...

What happens when galaxies collide?

We don't want to scare you, but our own Milky Way is on a collision course with Andromeda, the closest spiral galaxy to our own. At some point during the next few billion years, our galaxy and Andromeda – which also happen ...

A giant impact: Solving the mystery of how Mars' moons formed

Where did the two natural satellites of Mars, Phobos and Deimos, come from? For a long time, their shape suggested that they were asteroids captured by Mars. However, the shape and course of their orbits contradict this hypothesis. ...

Mystery of Saturn's 'F ring' cracked, says study

An enigmatic ring of icy particles circling Saturn, herded into a narrow ribbon by two tiny moons, was probably born of a cosmic collision, according to a study published Monday in Nature Geoscience.

Astrophysicist discusses Pluto flyby findings

NASA's New Horizons spacecraft reached its closest approach to Pluto on Tuesday, swooping to within 7,800 miles of the dwarf planet out beyond Neptune, snapping pictures and gathering data.