This is an artist's concept of a plume of water vapor thought to be ejected off of the frigid, icy surface of the Jovian moon Europa, located 500 million miles from the sun.
NASA, ESA, and K. Retherford
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)
This image shows Jupiter's south pole, as seen by NASA's Juno spacecraft from an altitude of 32,000 miles. The oval features are cyclones, up to 600 miles in diameter.
NASA/JPL-Caltech/SwRI/MSSS/Betsy Asher Hall/Gervasio Robles
After entering orbit around Jupiter on July 4, the spacecraft's camera, JunoCam, has begun to send images like the one above back to Earth. Pictured here are Jupiter and three of its moons.
Courtesy of NASA
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.