4,000 Exoplanets ...so farAstronomers have discovered more than 4,000 exoplanets – planets orbiting other stars – so far, with a lot more waiting for confirmation. Now, NASA has published a cool new video “summary” of the findings, a time-lapse map if you will, of the locations of these distant worlds in our galaxy.
It’s hard to think back to before the early 1990s, when astronomers believed exoplanets existed, but had not found a single one in outer space. Now we know of thousands, and scientists estimate that there are billions in our galaxy alone. When you combine that with the fact that there are at least 100 billion known galaxies, the total numbers of likely exoplanets becomes mind-boggling to contemplate. [earthsky.org]