thumb|260px|W75N(B)-VLA2 in 1996 (top) and in 2014
thumb|260px|W75N(B)-VLA2 in 1996 (top) and in 2014
W75N(B)-VLA2 is a massive protostar located in the Cygnus X region some 4,200 light-years from Earth, about 8 times more massive and 300 times brighter than the Sun, observed in 1996 and 2014 by the Karl G. Jansky Very Large Array (VLA). In 2014 its stellar wind had changed from a compact spherical form to a larger thermal, ionized elliptical one outlining collimated motion, giving critical insight into the very early stages of the formation of a massive star. Being able to observe its rapid growth as it happens (in real time in an astronomical context) is unique, according to Huib van Langevelde of Leiden University, one of the authors of a study of the object.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).