Looking for a sky event this week? Check out our full Sky This Week column.  June 14: Irene nears opposition This afternoon, Mercury reaches greatest eastern elongation at 4 P.M. EDT, standing 25° from the Sun. You’ll find the solar system’s smallest planet in the evening sky, now shining at magnitude 0.5.  Half an hour after sunset, Continue reading "The Sky Today on Monday, June 15: Mercury at greatest eastern elongation" The post The Sky Today on Monday, June 15: Mercury at greatest eastern e