Despite being some 5,500 times as massive as the sun, the cloud went unnoticed ... Burkhart and colleagues estimate that Eos will slowly disappear over the next 6 million years.

We caught the sunrise on the beach in Nador, just as the sun peeked over the horizon. A rainbow stretched across the sky, and the tide rolled in beside us. The day hadn’t fully woken up yet ...

The solar system is our cosmic neighborhood, made up of the sun and everything that orbits ... forming planetesimals — the building blocks of planets. Over millions of years, these objects ...

This spectacular new image from a new telescope in Hawaii marks the moment the Red Planet reappeared over the lunar horizon — a "Mars ... an outer planet and the sun, making that planet as ...