Greenfield 12V is a star named after Mr. Greenfield, the owner of Greenfield Observatory. Professor Spaulding discovered it using a new telescope.
Greenfield 12V is a big, twinkling star.
Scooby-Doo and Scrappy-Doo (first series)
A star creature supposedly came from the new star through the big telescope, trying to take over the Earth. It was actually Mr. Greenfield in disguise trying to steal secrets from Star Laboratory.