General

At least one astrophysicist says planets are formed in the same manner as dust bunnies that form underneath your bed. Check out this quote from a space.com article by Robert Roy Britt.

Rocky planets like Earth are thought to form when dust motes around a nascent star gather to form rocks. Rocks collide, and some stick and grow.

"The dust bunnies under your bed grow in a similar way," said Scott Kenyon, a planet-formation theorist at the Harvard-Smithsonian Center for Astrophysics. "And after a million years, a dust bunny can get pretty big."

So if the dust particles beneath your bed have collided, stuck together and started to grow, don't worry about it. You're not a bad housekeeper. You're conducting a scientific experiment. Just a suggestion: Don't wait a million years before you clean. Asteroids tend to clog the vacuum hose.