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Paul Scott Anderson

What’s the recipe for a habitable exoplanet?

October 2, 2018 by Paul Scott Anderson

We often hear the term “habitable” next to the word exoplanets. Which exoplanets are habitable; that is, which are capable of supporting life? But how …

Read MoreWhat’s the recipe for a habitable exoplanet?

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Ross 128 b and the search for Earth-like exoplanets

September 26, 2018 by Paul Scott Anderson

Of all the exoplanets being discovered these days, some of the most exciting – if not the most – are those that might be Earth-like. …

Read MoreRoss 128 b and the search for Earth-like exoplanets

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Report calls for direct images of Earth-like exoplanets

September 18, 2018September 18, 2018 by Paul Scott Anderson

The National Academies of Sciences, Engineering and Medicine (NASEM) in Washington, D.C., just released a new congressionally mandated report that aims to guide scientists’ study …

Read MoreReport calls for direct images of Earth-like exoplanets

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What is the Hypatia Catalog?

September 14, 2018 by Paul Scott Anderson

As more and more exoplanets are discovered, with 3,779 confirmed so far plus 2,737 additional candidates, the focus is shifting from merely finding exoplanets to …

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‘Towering hexagon’ and auroras: Saturn’s north polar wonders

September 11, 2018September 11, 2018 by Paul Scott Anderson

Saturn’s north pole is an incredibly active place, data from NASA’s Cassini mission and the Hubble Space Telescope have shown, with its massive hexagonal weather …

Read More‘Towering hexagon’ and auroras: Saturn’s north polar wonders

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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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