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Researchers suggest adding another variable when calculating the possibility for extraterrestrial life on a planet.

Planetary tilt could affect alien life

Artist's rendition of the Milky Way's billions of planets. (credit: M. Kornmesser / ESO)

An exciting announcement was made recently that suggests there could be billions of extraterrestrial-inhabited planets in our very own galaxy. According to MSNBC, a statistical analysis based on a survey of millions of stars suggests that there is at least one planet for every star in the sky, and probably more, adding up to approximately 160 billion planets in the Milky Way.

A team of international scientists recently published findings in the journal Nature that conclude “stars are orbited by planets as a rule, rather than the exception,” and many of those are likely to be similar to Earth. The estimate is that one in ten planets is the right temperature to sustain life.

The search for habitable planets and extraterrestrial life is gaining momentum, thanks largely to NASA’s planet-hunting space telescope Kepler. But according to a team of scientists, an important element has been overlooked when considering a planet’s potential habitability. According to René Heller, a postdoctoral research associate at the Leibniz Institute for Astrophysics in Potsdam, Germany, many astrobiologists have failed to consider the variable of planetary tilt in calculating the possibility for alien life to exist on other planets.

Artist's conception of Kepler-22b (credit: NASA/Ames/JPL-Caltech)

Space.com reports that Heller and his colleagues recently published two papers describing how the gravitational interactions of stars and planets eventually erode the axial tilt of a planet. Computer simulations executed by the researchers concluded that “red dwarfs quickly erase the axial tilt of habitable, Earth-like exoplanets,” therefore eliminating the “temperature-moderating tilt” that the researchers contend makes life more likely to exist on a planet. Planets around sun-like stars, such as the newly discovered Kepler-22b, are less likely to experience this axial tilt erosion, and therefore are better candidates for life.

About Jason McClellan

Jason McClellan is a UFO journalist and the producer/co-host of the web series Spacing Out! He is also the web content manager and staff writer for OpenMinds.tv, and a co-organizer and technical producer of the International UFO Congress. As a founding member of Open Minds, Jason served as a writer and editor for the now defunct Open Minds magazine. He has appeared on Syfy, NatGeo, and, most recently, he co-starred on H2's Hangar 1: The UFO Files. ------ Follow Jason on Twitter @acecentric and subscribe to Jason's updates on Facebook.