On this day 35 years ago, NASA's Voyager 1 spacecraft took a picture that changed how we see our planet. The iconic "Pale Blue Dot" image is just as awe-inspiring today.

The four planet-strong "planet parade" currently visible to the naked eye in the night sky for a short time after sunset will ...

The zodiacal light shines in the evening as the Moon reaches Last Quarter and skims past Spica and Antares in the sky this ...

A new study out this week said that the Earth's inner core is less solid than previously thought. Scientists still have questions, though.

Incredibly powerful marsquakes that violently shake the red planet don't always begin under the surface, research shows.

The mantle, a zone between our planet’s thin crust and the molten core, features 1,800 miles (2,900 kilometers) of mostly solid rock, with a consistency like thickened caramel that scientists ...

The dark skies during a new moon provide ideal conditions for spotting skywatching targets that would otherwise be outshined by moonlight. The next new moon will occur on Thursday, Feb. 27 at 7:45 ...

The alignment of six planets – Mars, Jupiter, Uranus, Neptune, Saturn, and Venus – this month has sky photographers ... When you want to take photos of the sky you want to wait until it’s waning or ...