Mercury will reach its greatest eastern elongation, marking the point where it is farthest from the Sun in the evening sky.

Stargazers in the U.S. will find the waxing gibbous moon above the southwestern horizon as the sun sets on July 3, with Spica ...

Less than two weeks later, on June 25, reports began to circulate of a second nova blossoming in the southern night sky, this time in the constellation Vela. This nova — later designated V572 Velorum ...

Mercury begins a rapid plunge toward the setting sun. By early July, Mercury is lost in the glare of the sunset. By late July, Mars begins to sink into the ...

Two stellar explosions have created an unprecedented astronomical phenomenon, with both outbursts now visible to the naked ...