Getting closer to Earth 2.0: Astronomers discover 20 new potentially habitable exoplanets

Exoplanets, planets orbiting stars other than the Sun, are being discovered by the thousands now, and there are estimated to be billions of them in our galaxy alone. So far, they have ranged from worlds smaller than Earth, to “super-Earths” and “hot Jupiters” – a …

Read MoreGetting closer to Earth 2.0: Astronomers discover 20 new potentially habitable exoplanets

Kepler Space Telescope discovers first evidence for exocomets transiting their stars

Comets, those icy and rocky bodies with the spectacular long tails of gas and dust, are common in our Solar System, with several thousand having been discovered so far. But what about other solar systems? Thousands of exoplanets are now being discovered, along with the …

Read MoreKepler Space Telescope discovers first evidence for exocomets transiting their stars

First exomoon found? Astronomers optimistic but urge caution

Artist’s conception of a large Earth-like exomoon orbiting a giant gaseous exoplanet. Image Credit: Avatar/20th Century Fox

Exoplanets are being found so frequently now that they have become commonplace. But what about exomoons? As might be expected, they are much harder to detect, being typically much smaller than most planets. There have been tantalizing hints but nothing conclusive so far. That may be about to change soon, however. Astronomers from Columbia University have reported the possible discovery of the first exomoon – but they stress that it is still unconfirmed and just a candidate at this point.

Read MoreFirst exomoon found? Astronomers optimistic but urge caution

Bizarre Boyajian’s Star (‘alien megastructure’ star) is dipping again!

Artist’s concept of Boyajian’s Star with a huge swarm of comets. Image Credit: NASA/JPL-Caltech

The weird star called Boyajian’s Star (aka Tabby’s Star or KIC 8462852) has been fascinating astronomers and people in general because of its weird behaviour of experiencing sudden, unusual dips in brightness which all current theories have so far had difficulty explaining. Now, the star has started dipping again after a long period of “normal” activity.

Read MoreBizarre Boyajian’s Star (‘alien megastructure’ star) is dipping again!