What created this unusual mountain? There is a new theory. Ahuna Mons is the largest mountain on the largest known asteroid in our Solar System, Ceres, which orbits our Sun […]

At the end of last year’s northern summer, after its dazzling opposition, Mars still shone brightly in the night. The celestial beacon easily attracted the attention of these two night […]

The constellation of Orion is much more than three stars in a row. It is a direction in space that is rich with impressive nebulas. To better appreciate this well-known […]

If you put your ear to Mars, what would you hear? To find out, and to explore the unknown interior of Mars, NASA’s Insight Lander deployed SEIS late last year, […]

When did these big galaxies first begin to dance? Really only four of the five of Stephan’s Quintet are locked in a cosmic tango of repeated close encounters taking place […]

Why do some spiral galaxies have a ring around the center? First and foremost, M95 is one of the closer examples of a big and beautiful barred spiral galaxy. Visible […]

Star formation can be colorful. This chromatic cosmic portrait features glowing gas and dark dust near some recently formed stars of NGC 3572, a little-studied star cluster near the Carina […]

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 […]