'Name That Space Rock' Great infographic that clearly & concisely shows differences between a comet, asteroid, meteoroid, meteor & meteorite. (Credit and copyright: Tim Lillis) Mona Evans, "Meteor or Meteorite & Other Posers"
What would Earth be like with no moon? EarthSky 11/30/16 Earth without its moon would be a very different world indeed. No eclipses. Smaller tides. But the biggest change would be in the length of Earth’s day-moons of the solar system, with the Earth for scale- the moon is pretty big. But Pluto and its moon are even closer in size via NASA.
How long to orbit Milky Way’s center? | EarthSky 11/28/16 One journey of our sun and planets around the center of our Milky Way galaxy is sometimes called a cosmic year. That’s approximately 225-250 million Earth-years. Artist's concept of solar system with the Milky Way galaxy in the background.