Summer nights offer lots of interesting sights this month. Mercury and Mars are on show in the evening twilight. Both Uranus ...

Venus continues to be the “Morning Star” in the east before dawn, albeit it has become dimmer — but still bright — as it ...

Mercury reaches its greatest elongation, 26 degrees east of the sun on July 4. From latitude 40 degrees north, the ...

Earth reaches aphelion, its farthest point from the sun, at 2:54 p.m. on July 3. At that moment we’ll be 94.5 million miles from our parent star.

Researchers now appreciate that gas planets are more complex than first thought. New findings have implications for our ...

Venus will trine Jupiter on Saturday, September 14 at 10:34 p.m. PT/Sunday, September 15 at 1:34 a.m. ET. But you could feel its effects for about four days before and after the astrological event ...

Six of our cosmic neighbors are expected to line up across the night sky tonight, in what has been dubbed a "planetary parade". Throughout much of January and February, Venus, Mars, Jupiter ...