Exoplanets once trumpeted as life-friendly may not exist

Spots on nearby star could have led to false planet detections

By Andrew Grant, 11:58 AM July 3, 2014

Two planets considered among the most promising for life outside the solar system don’t exist, scientists report July 3 in Science. The signals embedded in starlight that were attributed to the planets may instead have been caused by the changing magnetic activity of their star, Gliese 581.

Although the study isn’t the final word on these enticing yet controversial worlds, scientists say it reinforces the need for meticulous analyses to separate planets’ signals from those generated by spots a...

Source URL: https://www.sciencenews.org/article/exoplanets-once-trumpeted-life-friendly-may-not-exist