A trio of astronomical events will take place within a single week this month, including a well-known meteor shower.

Although it won’t hit Earth, an asteroid once labeled a “city killer” is now back in the spotlight — this time, because it ...

Scientists warn the universe could reverse its expansion and collapse in a “Big Crunch” — with the first signs possibly emerging in just 10 billion years.

In this edition of WTOP’s monthly space feature, “What’s up in the sky?” Greg Redfern tells you how to see the moon, planets, stars and Perseid meteor shower.

Mercury begins to emerge from the dawn glow after Aug. 12. On Aug. 19, Mercury reaches its greatest elongation west of the ...