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Ancient Martian icebergs?

October 5, 2010 by Paul Scott Anderson

Images from the Mars Reconnaissance Orbiter have provided evidence of possible icebergs in the ancient Martian past. It has long been speculated that the northern …

Read MoreAncient Martian icebergs?

Two steps closer to finding another Earth

October 1, 2010 by Paul Scott Anderson

This past week, there were two more news items of great interest relating to exoplanets, and the search ultimately for another Earth-like planet. The first, …

Read MoreTwo steps closer to finding another Earth

And now, the case of the disappearing methane

September 20, 2010 by Paul Scott Anderson

First, as posted a few days ago, there was the mystery of seemingly missing methane on an exoplanet. Now there’s another methane-related riddle, on Mars. …

Read MoreAnd now, the case of the disappearing methane

Blog update

September 20, 2010 by Paul Scott Anderson

I’ve tweaked the blog a bit more, updating the header graphic a bit and switching to a white background. Also playing with the CSS for …

Read MoreBlog update

The case of the missing methane

September 15, 2010 by Paul Scott Anderson

In our solar system, all of the gas giant planets have abundant methane in their atmospheres. It was expected that similar planets in other solar …

Read MoreThe case of the missing methane

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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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