Discovery Alert: Water Vapor Detected on a ‘Super Neptune’ Posted on 2022/01/20 by Carl Robitaille Discovery Alert: Water Vapor Detected on a ‘Super Neptune’ Discovery Alert!A rarer planet type joins the list of known worlds. This brings the total of confirmed planets beyond our solar system to 4,903!We are moving closer and closer to 5,000! https://t.co/FUNYZNmdGF pic.twitter.com/J6ZyMXTMKx— NASA Exoplanets (@NASAExoplanets) January 15, 2022