Spica is a binary star system located 250 light-years from Earth in the constellation Virgo. The waxing gibbous moon will ...

This month will usher in two separate conjunctions — one between the moon and a rarely-visible Mercury, and another between ...

This month's night sky is filled with close-range meteors, swirling nebulas, and prime stargazing conditions. Here’s when you ...

Venus continues to be the brilliant “Morning Star” in the East before dawn, albeit dimming just a bit as it moves away from ...

The ever-moving lunar terminator has shifted to throw three prominent craters into contrast: Ptolemaeus, Alphonsus, and ...

I pick out North America’s celestial highlights for the week ahead (which also apply to mid-northern latitudes in the ...

Strawberry moon will be at full illumination June 11, the latest of the full moons tied to Native American tradition.

Below Corona Borealis is bright star Vega. Tracking the moon night by night is one of the easiest ways to understand the rhythm of the sky. It moves about 12–13 degrees eastward each day — a ...

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A crescent moon will appear alongside the bright stars Castor and Pollox to form a lopsided grin in the night sky on May 29.

Scientists have discovered key differences under the moon's surface that may explain why its two hemispheres look so different. The moon's near side, the side visible to Earth, is dark and covered ...

The Moon’s illumination is given at 12 P.M. local time from the same location. For a look ahead at more upcoming sky events, check out our full Sky This Week column.