(CNN) — Astronomers have spotted a large and mysterious dark spot within Neptune's atmosphere, and it has an unexpectedly bright companion. The observation was made using the European Southern ...

Using ESO's Very Large Telescope (VLT), astronomers 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 dark spot ...

Astronomers observing Neptune from the mountains of Chile have seen a large dark spot in the eighth planet’s atmosphere with an unexpected smaller bright spot next to it. The first time a dark spot on ...

Astronomers have spotted a large and mysterious dark spot within Neptune’s atmosphere, and it has an unexpectedly bright companion.Video above: NASA discovers a question mark in spaceThe observation ...