Venus, Mars, Jupiter and Saturn are visible to the naked eye this month and for part of February. Uranus and Neptune can be spotted with binoculars and telescopes.

While the planets are technically always "aligned" along the same plane in our sky, seeing so many at once is a special opportunity ...

Hubble Space Telescope mapped Andromeda, revealing a chaotic history shaped by mergers. A 2.5-billion-pixel mosaic shows 200 ...

Miguel Claro captured a stunning portrait of the colorful Pelican Nebula from the Dark Sky Alqueva Observatory in Portugal.