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astrobiology

An easier way to search for life on Europa

August 5, 2018August 5, 2018 by Paul Scott Anderson

When it comes to the question of what places in the Solar System would be the best to search for alien life, Europa immediately comes …

Read MoreAn easier way to search for life on Europa

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The case for a habitable moon

August 2, 2018 by Paul Scott Anderson

Could there have been life on the Moon in the distant past? Our airless, mostly dry moon certainly isn’t the first place that comes to …

Read MoreThe case for a habitable moon

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Subsurface lake discovered on Mars?

July 30, 2018 by Paul Scott Anderson

Water on Mars! Again! Doesn’t it seem like every year or two, we hear about some new water-related finding on the red planet? So far, …

Read MoreSubsurface lake discovered on Mars?

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Innovative new instrument to seek habitable worlds

July 16, 2018 by Paul Scott Anderson

As more and more exoplanets are discovered, the technology used to help find them keeps advancing as well. This is especially true when it comes …

Read MoreInnovative new instrument to seek habitable worlds

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These 2 exoplanets might have seasons and stable climates

July 10, 2018 by Paul Scott Anderson

We sometimes hear the term Earth-like in describing exoplanets that might be similar to our own world. The terms “Earth-like” or Earth analog conjure up …

Read MoreThese 2 exoplanets might have seasons and stable climates

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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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