A SpaceX Falcon 9 rocket transporting the TESS satellite lifts off at the Cape Canaveral Air Force Station in Florida on Wednesday. The satellite will scan nearly the entire sky for alien worlds.
An artist's conception of the KELT-9 system, which has a host star (left) that's almost twice as hot as our sun. The hot star blasts its nearby planet KELT-9b, leading to a dayside surface temperature of around 7,800 degrees Fahrenheit.
NASA/JPL-Caltech/R. Hurt (IPAC)
Proxima Centauri lies in the constellation of Centaurus (The Centaur), just over four light-years from Earth. Although it looks bright through the eye of Hubble, Proxima Centauri is not visible to the naked eye.
ESA/Hubble & NASA
Earth as seen by the Expedition 47 crew on May 31, 2016, from the International Space Station — looking from northwestern China on the bottom into eastern Kazakhstan. The large lake in Kazakhstan with golden sun glint is the crescent-shaped Lake Balkhash, the second largest lake in Central Asia.
Launched from Earth in 2011, the Juno space probe has nearly reached Jupiter. If all goes as hoped, the probe will repeatedly dive between the planet and intense belts of charged particle radiation, in an orbit that will take it from pole to pole.
An artist's concept depicts one possible appearance of the planet Kepler-452b, the first near-Earth-size world to be found in the habitable zone of a star that is similar to our sun.
NASA Ames/JPL-Caltech/T. Pyle
A portrait of Pluto (right) and its moon Charon in a colorized, composite image made July 11 during the final approach of the New Horizons spacecraft. Astronomers are eager to get a much closer view of the icy world Tuesday.
An artist's rendition of the HD 7924 planetary system — just 54 light-years away from Earth — shows newly discovered exoplanets c and d, which join Planet b.
Karen Termaura, BJ Fulton/UH IfA
Stars over the Cerro Tololo Inter-American Observatory in Chile. Sheppard and Trujillo used the new Dark Energy Camera (DECam) on a telescope there to find the distant dwarf planet 2012 VP 113.