The boosters from the Falcon Heavy test launch landing.

The Falcon Heavy in flight during it's first launch.

The real Calvin and Hobbes fighting the monster that lives under the bed.

The real Calvin and Hobbes in a chopped-down forest.

The real Calvin and Hobbes walking in the snow.

The real Calvin and Hobbes with Calvin on rocket skis.

The real Calvin and Hobbes jumping their wagon into a lake.

The real Calvin and Hobbes walking in the woods.

The real Calvin and Hobbes with Calvin as a giant monster.

The real Calvin and Hobbes crashed on an alien world.

The real Calvin and Hobbes relaxing in the den.

The real Calvin and Hobbes in the bedroom meeting more Calvin's.

The real Calvin and Hobbes in the woods balancing on a log.

The real Calvin and Hobbes fighting over a tree fort.

The real Calvin and Hobbes on Mars.

The real Calvin and Hobbes in the woods chasing snowmen.

The real Calvin and Hobbes as a film noir detective.

The real Calvin and Hobbes walking in the woods.

The real Calvin and Hobbes walking through the snowy woods.

The dark dunes on Mars, captured by the Curiosity rover.

An enhanced-color view, this image covers a 350 by 750 kilometer swath across the surface of Jupiter's tantalizing moon Europa. The close-up combines high-resolution image data with lower resolution color data from observations made in 1998 by the Galileo spacecraft. Smooth ice plains, long fractures, and jumbled blocks of chaos terrain are thought to hide a deep ocean of salty liquid water beneath. Though the ice-covered alien ocean world is outside the Solar System's habitable zone, new studies show the potential chemistry driving its oxygen and hydrogen production, a key indicator of the energy available for life, could produce amounts comparable in scale to planet Earth. Hydrogen would be generated by chemical reactions of the salty water in contact with the rocky ocean floor. Oxygen and other compounds that react with hydrogen would come from Europa's surface. There water ice molecules would be split apart by the intense flux of high-energy radiation from Jupiter and cycled into the Europan ocean from above.

This illustration shows a star surrounded by a protoplanetary disk. Material from the thick disk flows along the star’s magnetic field lines and is deposited onto the star’s surface. When material hits the star, it lights up brightly.

A high-resolution view of Pluto taken by the New Horizons probe.

A flat version of the Google Chrome logo.

The Google Chrome logo as a wallpaper image.