To celebrate its 70th anniversary, Sky & Telescope is releasing a free app, S&T SkyWeek for Android.
A new study with the Hubble Space Telescope pins down the universe's expansion rate with unprecedented accuracy.
The Hubble Space Telescope captures a spiral galaxy in remarkable detail.
With the help of Jupiter's moon Europa, astronomers have imaged the re-emerging South Equatorial Belt in unprecedented detail.
Find out how Joe DePasquale converted grayscale ESO data into beautiful full-color images as part of the Hidden Treasures competition.
News media worldwide are reporting today on the new "farthest galaxy ever found," but the discovery is not quite as definite as it’s being made out.
A recent study shows that the Crab Nebula, long considered a steady source of X-rays, actually fluctuates.