The Solar System contains 18 or 19 natural satellites of planets that are large enough for self-gravity to make them round. (Why the uncertain number? Neptune’s moon Proteus is on the edge.) They are shown here to scale with each other. Two of them are larger than Mercury; seven are larger than Pluto and Eris. If they were not orbiting planets, many of these worlds would be called “planets,” and scientists who study them are called “planetary scientists.”
Parody PSA of The Day: Millennials Apologize for Sucking So Bad
This sarcastic PSA video brought to you by Can Opener Studio offers a series of apologetic messages from the Millennial Generation for being unemployed, crippled by student loan debt and texting too much in an economy void of the manufacturing jobs that were once readily available for the baby boomers and their parents’ generation.