A timeline of the solar system etched into a concrete sidewalk. Included are drawings of the planets depicting their positions; the traveling time of sunlight to the planets and the revolutions of the ...

Discover how a giant interstellar cloud known as the solar nebula gave birth to our solar system and everything in it.

Astronomers have discovered a rare in-sync solar system with six planets moving like a grand cosmic orchestra, untouched by outside forces since their birth billions of years ago. The find ...

A new view of the solar system's early days proposes that the first two kinds of solid materials — the precursors of space rocks and ultimately planets — both formed at the same time.