A new Hubble Space Telescope image reveals the peculiar structure of a spiral galaxy with only one starry arm rotating about its center.
Learn more about NASA's New Horizons mission, which performed history's first flyby of the Pluto system on July 14, 2015.
New Horizons' epic encounter with a small body in the far outer solar system is telling us a lot about how planets are born.
A year after New Horizons buzzed its second target, Arrokoth, a wealth of science has been revealed.
Hopefully you weren't too attached to "2014 MU69," because the most distant object ever explored has a new name.
New Horizons made an epic flyby of a Kuiper Belt object to ring in the New Year — but scientists need brand-new observations to truly understand that data.
A surprisingly gentle merger between two small primordial bodies formed the distant object Ultima Thule, a new study suggests.
Learn about the physical characteristics of Saturn and its famous rings, what we know about Saturn’s moons and Saturn’s roots in Greek mythology.
Beyond Neptune, the Kuiper Belt is a vast region of icy objects called Kupier Belt Objects (KBOs), including dwarf planets Pluto, Eris, Maumea and Makemake — and possibly a true ninth planet.
An ethereal track by Queen lead guitarist Brian May accompanies the awe-inspiring time-lapse view from NASA's New Horizons flyby of a distant solar system object.
The New Horizons spacecraft is speeding away from its recent flyby target, a distant icy space rock nicknamed Ultima Thule, but the view from Earth is only getting better.
The best-ever photos of Ultima Thule have made it down to Earth, and they heighten the intrigue about the frigid and faraway world.
The final photos that NASA's New Horizons spacecraft snapped of Ultima Thule during the probe's epic Jan. 1 flyby reveal the distant object to be much flatter than scientists had thought.
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