A streak in a @NASAHubble image was so unusual that astronomers thought it must be a camera artifact. Later observations revealed it to be a 200,000-light-year-long chain of bright blue newborn stars spurred by a possible runaway black hole! https://go.nasa.gov/3ZXD9XW #NASAExoplanets
There's an invisible monster on the loose, barreling through intergalactic space so fast that if it were in our solar system, it could travel from Earth to the Moon in 14 minutes.
