astronomy

Everybody remembers Pluto's demotion to dwarf planet in 2006. This reclassification was triggered by the discovery of Eris, an object far out beyond Pluto's orbit that was found to be 27% more massive than Pluto. So either it had to be the tenth planet, or Pluto shouldn't classify as planer either.

I hope you are sitting down firmly as I'm about to tell you how fast you are actually going around just sitting there in place.

First of all, your on the surface of this planet, rotating around it's axis. The rotation takes you around the circumference of the planet in one day. To accomplish that, we are spinning around at around 1700km/h (or 0,5km/s).