Sometimes it’s hard to decide which is more impressive — the land or the sky. On the land of the featured image, for example, the Volcano of Fire (Volcán de […]

One of the most spectacular solar sights is an erupting prominence. In 2011, NASA’s Sun-orbiting Solar Dynamic Observatory spacecraft imaged an impressively large prominence erupting from the surface. The dramatic […]

What bizarre planet are these alien creatures from? It’s only planet Earth, of course. The planet’s home galaxy the Milky Way stretches across a dark sky in the panoramic, fisheye […]

An abundance of boulders litters the surface asteroid 101955 Bennu in this dramatic close-up from the OSIRIS-REx spacecraft. Taken on March 28 from a distance of just 3.4 kilometers (2.1 […]

These three bright nebulae are often featured on telescopic tours of the constellation Sagittarius and the crowded starfields of the central Milky Way. In fact, 18th century cosmic tourist Charles […]

How does your favorite planet spin? Does it spin rapidly around a nearly vertical axis, or horizontally, or backwards? The featured video animates NASA images of all eight planets in […]

Why would clouds appear to be different colors? The reason here is that ice crystals in distant cirrus clouds are acting like little floating prisms. Sometimes known as a fire […]

Pulsating RS Puppis, the brightest star in the image center, is some ten times more massive than our Sun and on average 15,000 times more luminous. In fact, RS Pup […]

How far away is spiral galaxy NGC 4921? It’s surpringly important to know. Although presently estimated to be about 300 million light years distant, a more precise determination could be […]

Why does star cluster Trumpler 14 have so many bright stars? Because it is so young. Many cluster stars have formed only in the past 5 million years and are […]