... Tonight's Sky . ... Observing . ... solar system . ... Astronomy for Kids . ... Sky Guide . ... What stops solar eruptions? Physicists determine the difference between false starts and true eruptions by studying the Sun s magnetic field. ... Solar physicists should thus be on the lookout for guide fields, which can be found in relatively simple reconstructions of the sun s potential magnetic field. ... Only registered members of Astronomy.com are allowed to comment on this article. ...