Farewell, Rosetta comet mission

ESA's great Rosetta comet mission has come to an end. Details from its final hour, here.

Need details on SpaceX’s Mars mission?

Links, photos and more about Elon Musk's plan to make humans a multiplanetary species.

Mercury is tectonically active

New findings suggest Mercury is contracting and experiences ongoing "mercuryquakes."

Possible water plumes spotted on Europa

Water plumes erupting on Jupiter's moon Europa might make it easier to investigate whether life exists in the warm ocean believed to be deep beneath its icy surface.

Last hurrah of sunlike star

New Hubble image shows the demise of a sunlike star. Our own sun will also burn out and shroud itself with stellar debris, but not for another 5 billion years.

Cassini begins epic final year at Saturn

The spacecraft will plunge repeatedly between Saturn and its rings, and finally execute a headlong plummet into the body of Saturn itself.

Dwarf galaxies and dark matter update

Standard cosmology calls for many more dwarf galaxies than we see. A new computer simulation suggests we might not need so many dwarf galaxies, after all.

Twin jets pinpoint active galaxy’s heart

The supermassive black hole at the heart of NGC 1052 is now the most precisely located supermassive black hole in the universe … almost.

Hubble sees a comet breaking up

This comet is spinning so fast it's ejecting building-sized chunks, littering space with a debris trail as wide as the continental U.S.

Pluto ‘paints’ its largest moon red

"Who would have thought that Pluto is a graffiti artist, spray-painting its companion with a reddish stain that covers an area the size of New Mexico?"

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