Just Plain Rings
Saturn's beautiful rings encircle the planet in this image from the Cassini spacecraft, which is entering the final year of…
Saturn's beautiful rings encircle the planet in this image from the Cassini spacecraft, which is entering the final year of…
This artist's concept shows the major and minor spiral arms of our home galaxy, the Milky Way. Our solar system…
Biosphere 2, a complex designed to simulate Earth’s multiple ecosystems, gleams in the Arizona sunset. A team of “biospherians” was…
This artist’s concept of the planet known as HAT-P-11b shows how astronomers can discover and study the atmosphere of a…
The faint star TRAPPIST-1 glows above the surface of one of its three known planets in this artist's concept. Another…
This artist's concept shows how Kepler Space Telescope discovers planets in other star systems. The telescope looks for a planet…
The star cluster Messier 39 contains only about 30 stars, but they sparkle grandly in this view, which was compiled…
Neptune, the most remote of the Sun's eight major planets, is a giant blue marble, as shown in this view…
Delicate spiral arms encircle the bright nucleus of M63, the Sunflower galaxy, in this Hubble Space Telescope image. M63 is…
Lunar Orbiter 1 snapped its first pictures of the Moon on August 18, 1966. And five days later, the first…