I cover aerospace, astronomy & hosted The Cosmic Controversy Podcast. At least 50 billion planets in our own Milky Way galaxy are likely to be free-floaters --- unbound to any star system ...

It was the largest distance ever measured ... let's return to the Andromeda Galaxy and examine it from our vantage point on the dust-grain planet we call Earth. The remarkable thing is that ...

creating the largest photomosaic ever assembled from the telescope. It took ten years, 1,000 Hubble orbits, and required over 600 Hubble overlapping snapshots made up of at least 2.5 billion pixels.

Milky Way May Have Billions of Earth-Like Planets There could be as many as 40 billion habitable Earth-size planets in the galaxy, according to a new study. WSJ's Monika Vosough reports.

The Hubble Space Telescope has created a 2.5-billion-pixel image of the Andromeda galaxy, our closest neighbour ...