What's the Weird Thing in Space That Pulses Every 20 Minutes?

An undergraduate student made an accidental discovery of something very weird in the night sky. This is a fairly recent result and one that astronomers have been puzzling over. What's the weird thing in space that's pulsing every 20 minutes you're telling me this isn't about a giant slime monster though I'm saying we don't know. Maybe there is a giant slimemonster out there that burps every 20 minutes and that's going to be the answer right.