Trundling along the ecliptic plane in Virgo, our satellite hangs near the bright star Spica in the evening sky.

Friday, July 4 Mercury reaches its greatest eastern elongation from the Sun, standing 26° from our star at 1 A.M. EDT. We’ll ...

Nearly 400 years ago, Galileo looked at the Pleiades star cluster through his telescope and noticed that the seven or so ...