... Tonight's Sky . ... Observing . ... GRBs spark protoplanetary lightning . ... The researchers believe each of these gamma-ray sources is capable of sparking chondrule-forming lightning storms, and, taken together, they may be able to account for the abundance and complexity of chondrules in the solar system. ... Only registered members of Astronomy.com are allowed to comment on this article. ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...