William Sanford Nye, popularly known as Bill Nye the Science Guy, is an American science communicator, television presenter, and mechanical engineer. wikipedia.org
Definition #2 for "bill nye launch sign"
Bill Nye Launch Sign is a photoshop meme based on an image tweeted by Bill Nye in which he is shown holding a white sign toward the camera announcing a chance to join him for the launch of the Space X Falcon Heavy rocket. Since its upload via Nye?s official Twitter account in mid-October 2017, the image has been turned into an exploitable template for online parodies.