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exoplanets

Construction begins on ESA’s Plato planet-hunter

April 29, 2019October 15, 2018 by Paul Scott Anderson

The search for exoplanets – planets orbiting other stars – has really ramped up in recent years, with new telescopes, both space and ground-based, being …

Read MoreConstruction begins on ESA’s Plato planet-hunter

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Hubble and Kepler telescopes may have found first exomoon

May 2, 2019October 10, 2018 by Paul Scott Anderson

Exoplanets – planets orbiting other stars – have been found by the thousands now, with many more to come. But what about exomoons? So far …

Read MoreHubble and Kepler telescopes may have found first exomoon

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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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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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