Astronomers using the Multi Unit Spectroscopic Explorer (MUSE) instrument on ESO’s Very Large Telescope (VLT) have observed a large dark spot in Neptune’s atmosphere, with an unexpected smaller bright spot adjacent to it. This is the first time a Neptunian dark spot has ever been observed with a ground-based telescope. This image from the MUSE instrument on ESO’s Very Large Telescope shows Neptune; a dark spot can be seen to the upper-right....
