... Tonight's Sky . ... Sky this Month . ... An artificial comet holds secrets to Earths life . ... solar system . ... Astronomy for Kids . ... Sungrazing comet aids magnetic-field models . ... The tail motions that we observed reveal the pattern of the magnetic field within the solar corona, which enabled us to demonstrate that our magnetic-field model agrees quite closely with the Sun s invisible magnetic field. ... Only registered members of Astronomy.com are allowed to comment on this article. ...