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New Horizons

Closing in on Ultima Thule: New Horizons takes first images of distant KBO

September 5, 2018 by Paul Scott Anderson

NASA’s New Horizons spacecraft is rapidly closing in on its next target – a small Kuiper Belt Object (KBO) called Ultima Thule (aka 2014 MU69), …

Read MoreClosing in on Ultima Thule: New Horizons takes first images of distant KBO

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New Horizons team successfully observes new stellar occultation of Ultima Thule

August 8, 2018 by Paul Scott Anderson

Astronomers have just completed another observation of New Horizons’ next flyby target, Ultima Thule (aka 2014 MU69), pass in front of a distant star (a stellar …

Read MoreNew Horizons team successfully observes new stellar occultation of Ultima Thule

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Mapping new worlds: Researchers release first global maps of Pluto and Charon

July 25, 2018 by Paul Scott Anderson

When New Horizons sped past Pluto and its moons in July 2015, it revealed some incredible new worlds to explore. They are no longer just …

Read MoreMapping new worlds: Researchers release first global maps of Pluto and Charon

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Dunes on Pluto? Yes, but made of methane ice

June 9, 2018 by Paul Scott Anderson

We all know how common sand dunes are on Earth – just go to practically any desert region to see them in their various shapes …

Read MoreDunes on Pluto? Yes, but made of methane ice

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Record-breaking images from New Horizons are farthest ever taken from Earth

March 24, 2018February 15, 2018 by Paul Scott Anderson

NASA’s New Horizons spacecraft is way, way past Pluto now and still nearly a year away from its next encounter with an object in the …

Read MoreRecord-breaking images from New Horizons are farthest ever taken from Earth

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About Planetaria

About Planetaria



Pluto backlit by the Sun, as seen by New Horizons in 2015

Planetaria (formerly The Meridiani Journal) is a chronicle of planetary exploration, both in our own Solar System and beyond. Many continuing discoveries, such as the geysers of Enceladus, the subsurface ocean of Europa, the methane rivers, lakes and seas of Titan, the mountains and glaciers of Pluto, the cold but beautiful deserts of Mars and the thousands of exoplanets orbiting other stars make this an exciting time of exploration and discovery.

I publish Planetaria as a personal blog, a complement to my other freelance space writing for EarthSky and AmericaSpace.

- Paul Scott Anderson

Exoplanet Count

Exoplanet Count

Current Confirmed: 3,946
Current Candidates: 3,520
Potentially Habitable: 49

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