Spitzer – planetaria

NASA’s Spitzer Space Telescope discovers seven Earth-sized worlds orbiting nearby star

February 23, 2017 by Paul Scott Anderson

Artist’s conception of standing on the surface of exoplanet TRAPPIST-1f. Image Credit: NASA/JPL-Caltech

The search for exoplanets – planets orbiting other stars – has been one of the most exciting developments in astronomy and space science in recent years. The first couple exoplanets were found in 1992, and now over 3,400 have been confirmed, with over 5,000 additional candidates. Some of these are smaller rocky worlds similar in size to Earth, bringing scientists close to finding “Earth 2.0” – another planet with water and, perhaps, life. Yesterday, NASA announced another key discovery, bringing us even closer to finding another living world – a star with not just one or two Earth-sized planets orbiting it, but seven. Three of those planets are in the star’s habitable zone, where, depending upon other surface conditions, lakes or oceans of liquid water could exist.

Astronomers find first evidence of possible volcanic activity on a super-Earth exoplanet

May 7, 2015 by Paul Scott Anderson

Artist’s conception of super-Earth exoplanet 55 Cancri e, before and after volcanic activity on its day side. The surface may be partially molten. Image Credit: NASA/JPL-Caltech/R. Hurt

Discovering new exoplanets has become rather routine in the last few years, but determining just what conditions exist on any of them is naturally more difficult, since they are so far away. But astronomers are making advances in this area as well, and now they have found the first evidence of changing temperatures – and possible volcanic activity – on a distant super-Earth exoplanet.

Today’s weather forecast is patchy clouds – on exoplanet Kepler-7b

October 2, 2013 by Paul Scott Anderson

Size comparison between Kepler-7b (left) and Jupiter (right). Credit: NASA / JPL-Caltech / MIT — Size comparison between Kepler-7b (left) and Jupiter (right).
Credit: NASA / JPL-Caltech / MIT

Patchy clouds in the west and clear skies in the east. That is the current weather forecast, not for anywhere on Earth, but for a much more distant world in another solar system. For the first time, astronomers have been able to map cloud patterns on such a far-away exoplanet, it was announced on September 30, 2013.