During each iteration of its fierce and familiar 11-year cycle of activity, the turbulent surface of the sun reaches a crescendo, shooting jets of scalding gas and magnetic energy into space at a markedly increased rate. For the first time, astronomers have made continuous, long-term observations of such flare activity on stars outside the solar system, and they've found that the stars have cycles of activity and quiescence similar to those of the sun.
Note: To comment, Science News subscribing members must now establish a separate login relationship with Disqus. Click the Disqus icon below, enter your e-mail and click “forgot password” to reset your password. You may also log into Disqus using Facebook, Twitter or Google.