End of the Dark Ages
This chart illustrates several key stages in the early evolution of the universe. One of those stages was the epoch…
Cold Canyons
Flowing rivers have carved deep canyons on Titan, the largest moon of Saturn, such as Vid Flumina at the top…
Popping Off
Two views of Z Camelopardalis show an expanding cloud of gas and dust around the star system. The system consists…
Home of the Whopper
This diagram compares the size of the Sun, which is 865,000 miles (1.38 million km) in diameter, to VV Cephei,…
Two for Mars?
ExoMars, a joint project of the European and Russian space agencies, appears to have achieved mixed results at Mars. Trace…
Exotic but Close
An astronaut conducts experiments on the ocean floor during a recent excursion from Aquarius, a habitat on the ocean floor…
Cloudy California
The California Nebula is a cloud of interstellar gas set aglow by radiation from nearby hot stars. The cloud's outline…
Just Plain Rings
Saturn's beautiful rings encircle the planet in this image from the Cassini spacecraft, which is entering the final year of…
Arming the Milky Way
This artist's concept shows the major and minor spiral arms of our home galaxy, the Milky Way. Our solar system…
A New World
Biosphere 2, a complex designed to simulate Earth’s multiple ecosystems, gleams in the Arizona sunset. A team of “biospherians” was…