The second full moon of July wowed skywatchers around the world - and even in space.
On July 25, 2015, the near-Earth asteroid 1999 JD6 -- a 'contact binary -- made its closest pass of Earth in at least over a century.
In new observations beamed back from Cassini, Saturn's icy moon Tethys has decided to show off its mysterious stripes.
Earth's magnetic field, which protects the planet from harmful blasts of solar radiation, is much older than thought.
As Comet 67P/Churyumov-Gerasimenko approaches perihelion, the sun is heating up its nucleus and the solar wind is causing its tail to evolve. And the Rosetta mission has a ringside seat.
For the next six months, NASA's Saturn-orbiting Cassini spacecraft will get its final look at two icy moons -- one famous and one not so well-known -- before preparing for mission's end in 2017.
For the first time, astronomers have detected an aurora erupting beyond the solar system, giving us a profound glimpse at the magnetism surrounding a brown dwarf, or 'failed star.'
NASA's Mars rover Curiosity went out of its way to investigate a rock the likes of which it has never seen before on the Red Planet.
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