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dwarf planets

New dwarf planet nicknamed The Goblin

April 29, 2019October 13, 2018 by Paul Scott Anderson

Astronomers have found a goblin in the far reaches of the outer Solar System. No, it’s not a mythical space-faring creature. The Goblin is the …

Read MoreNew dwarf planet nicknamed The Goblin

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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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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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Ceres up-close: Dawn prepares for lowest (and last) science orbit around dwarf planet

June 7, 2018 by Paul Scott Anderson

NASA is about to get its closest-ever look at the dwarf planet Ceres – a world which has already amazed planetary scientists with its intriguing …

Read MoreCeres up-close: Dawn prepares for lowest (and last) science orbit around dwarf planet

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A closer look at enigmatic Ceres: NASA’s Dawn mission extended for second time

October 23, 2017 by Paul Scott Anderson

NASA’s Dawn spacecraft has been orbiting the dwarf planet Ceres since March 2015, providing the first close-up views of this rocky and icy world residing …

Read MoreA closer look at enigmatic Ceres: NASA’s Dawn mission extended for second time

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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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