Spitzer telescope goes dark, leaving bright legacy

NASA sent its final command to the Spitzer Space Telescope today, ending more than 16 years spent studying alien planets, dusty nebulas and distant galaxies in infrared wavelengths.

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Alien megastructure? Nothing to see here

Image: Comets and star
his illustration shows a star behind a shattered comet. Observations of the star KIC 8462852 by NASA’s Kepler and Spitzer space telescopes suggest that its unusual light signals are probably due to dusty comet fragments that blocked the light of the star. (Credit: NASA / JPL-Caltech)

Recent infrared observations of a star that once showed a pattern of weird dimming have turned up no anomalous readings, astronomers say – and that supports the view that a comet blitz rather than the construction of an alien megastructure was behind the earlier observations.

The latest evidence, laid out in a paper published in the Astrophysical Journal Letters, isn’t exactly surprising. The passing of a shattered comet was seen as the leading orthodox explanation for the star KIC 8462852’s strange behavior.

But there was also the unorthodox explanation. The readings from the star, gathered by NASA’s Kepler space telescope and analyzed by a citizen-science project known as the Planet Hunters, created a stir because of a potential alien connection.

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