Pluto Once Had Rivers and Lakes of Liquid Nitrogen, New Horizons Data Suggests

By Paul Scott Anderson, on March 23rd, 2016

Artist’s conception of Pluto’s surface, with the distant Sun and largest moon Charon in the sky. The surface is frozen now, but evidence suggests that rivers and lakes of liquid nitrogen once flowed here. Image Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute/Alex Parker

As has been discussed extensively now on AmericaSpace, […]

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Early Mars May Have Been Cold and Icy Rather Than Warm, According to New Study

By Paul Scott Anderson, on June 17th, 2015

Conceptual image of the two competing warm and cold models of early Mars. Image Credit: Robin D. Wordsworth

The debate over whether Mars used to be warmer and wetter or colder and wetter earlier in its history has been a long and contentious one. Now, a new study suggests it may be the […]

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Tilted Aquaplanets Might Still be Habitable, Study Suggests

By Paul Scott Anderson, on December 24th, 2014

Artist’s conception of an ocean-covered aquaplanet. Image Credit: Christine Daniloff/MIT

With so many exoplanets now being discovered on a regular basis by astronomers, the focus has turned to what number of them might be habitable for some kind of life. For life as we know it at least, that depends on a number […]

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