Add Yahoo as a preferred source to see more of our stories on Google. Space is filled with dust formed of tiny particles just microns — millionths of a meter — in size. Much of the dust in our solar ...

If you ever go hiking on an asteroid, you’ll want to pack one of Robert Gaskell’s maps. Gaskell, a senior scientist at the Planetary Science Institute, is to our solar system’s frontier what Lewis and ...

World views and the solar system -- Earth-centered world views in classical Europe -- Non-European world views -- Earth-centered world views in the Middle Ages and Renaissance -- Sun-centered and ...