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planetaria

Kepler confirms first planet in habitable zone of Sun-like star

December 6, 2011 by Paul Scott Anderson

Scientists from the Kepler mission announced this morning the first confirmed exoplanet orbiting in the habitable zone of a Sun-like star, the region where liquid water could exist on the surface of a rocky planet like Earth. Evidence for others has already been found by Kepler, …

Read MoreKepler confirms first planet in habitable zone of Sun-like star

Microscopic worms may help to colonize Mars

December 1, 2011 by Paul Scott Anderson

Once the realm of science fiction, the prospect of colonizing other planets is getting closer to reality. The most logical first place, besides the Moon, has always been Mars. Venus is a bit closer, but the scorching conditions there are, well, much less than ideal. …

Read MoreMicroscopic worms may help to colonize Mars

Could Curiosity determine if Viking found life on Mars?

November 30, 2011 by Paul Scott Anderson

One of the most controversial and long-debated aspects of Mars exploration has been the results of the Viking landers’ life-detection experiments back in the 1970s. While the preliminary findings were consistent with the presence of bacteria (or something similar) in the soil samples, the lack …

Read MoreCould Curiosity determine if Viking found life on Mars?

Life on alien planets may not require a large moon after all

November 30, 2011 by Paul Scott Anderson

Ever since a study conducted back in 1993, it has been proposed that in order for a planet to support more complex life, it would be most advantageous for that planet to have a large moon orbiting it, much like the Earth’s moon. Our moon …

Read MoreLife on alien planets may not require a large moon after all

Curiosity is on its way to Mars!

November 28, 2011 by Paul Scott Anderson

After much anticipation, the Curiosity rover, also known by its more formal name as the Mars Science Laboratory, was successfully launched from the Cape Canaveral Air Force Station in Florida last Saturday. The rover is scheduled to land on Mars on August 6, 2012. The …

Read MoreCuriosity is on its way to Mars!

Does Pluto have a hidden ocean?

November 23, 2011 by Paul Scott Anderson

In recent years, it has become surprisingly apparent that, contrary to previous belief, Earth is not the only place in the solar system with liquid water. Jupiter’s moon Europa, and possibly others, are now thought to have a deep ocean below the icy crust and …

Read MoreDoes Pluto have a hidden ocean?

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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

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Exoplanet Count

Exoplanet Count

Current Confirmed: 3,869
Current Candidates: 2,898
Potentially Habitable: 55

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