Catégorie : Images

These clouds are doubly unusual. First, they are rare noctilucent clouds, meaning that they are visible at night — but

Do other stars have planets like our Sun? Surely they do, and evidence includes slight star wobbles created by the

Why are these clouds multi-colored? A relatively rare phenomenon in clouds known as iridescence can bring up unusual colors vividly

Found among the rich starfields of the Milky Way, star cluster NGC 7789 lies about 8,000 light-years away toward the

A glow from the summit of Mount Etna, famous active stratovolcano of planet Earth, stands out along the horizon in

The beautiful Trifid Nebula is a cosmic study in contrasts. Also known as M20, it lies about 5,000 light-years away

Big, bright, and beautiful, spiral galaxy M83 lies a mere twelve million light-years away, near the southeastern tip of the

The clouds may look like an oyster, and the stars like pearls, but look beyond. Near the outskirts of the

What’s happened since the universe started? The time spiral shown here features a few notable highlights. At the spiral’s center

Rising opposite the setting Sun, June’s Full Moon occurred within about 28 hours of the solstice. The Moon stays close