Planetary systems begin in chaos. In their primitive form, many rocky and icy objects are careening through space, smashing ...

Astronomers believe the solar system's early days were a cosmic bumper-to-bumper, with planetesimals, asteroids, and comets ...

Could two giant planetary building blocks really meet in the same star system in just two decades? In the star system around ...

For only the second time ever, a collision between two asteroids has been observed around an alien star not too far beyond ...

Two rare cosmic collisions around the young star Fomalhaut were caught by space telescopes, offering new clues about how planets form.

Two cosmic collisions near the star Fomalhaut solve the mystery of a disappearing "planet" and show rare planetesimal crashes ...

Hubble discovered a point of light in a neighboring star system, presumably a debris cloud from a celestial body collision.

It is a rare occurrence indeed for a theory to be turned upside down by the cold accuracy of observation, until the Hubble ...

When the solar system began to form, everything was chaos. A slew of rocky material was smashing together in a maelstrom that ...

Astronomers studying a nearby star expected to find a planet. Instead, they caught two massive collisions in the Eye of ...

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