This illustration shows the asteroid 24 Themis flanked by two small fragments that broke off following a crash more than 1 billion years ago. The bottom fragment's cometlike tail comes from the sublimation of ice from its surface. Gabriel Perez, Servicio MultiMedia, Instituto de Astrofisica de Canarias, Tenerife, Spain hide caption

itoggle caption Gabriel Perez, Servicio MultiMedia, Instituto de Astrofisica de Canarias, Tenerife, Spain

This newly released image from Hubble shows scorching radiation and fast winds from super-hot newborn stars are shaping this pillar of gas and dust. This stellar nursery is called the Carina Nebula and located 7,500 light-years away. NASA hide caption

itoggle caption NASA

This illustration depicts the Dragon — a spacecraft being developed for NASA by the private company SpaceX — docking at the International Space Station. The Dragon spacecraft received a $1.6 billion contract to resupply the space station when the space shuttle retires. NASA hide caption

itoggle caption NASA

The crew of the space shuttle Discovery is set to launch Monday morning. Where will they go after the mission ends? John Raoux/AP hide caption

itoggle caption John Raoux/AP