It takes eight and a half minutes for light to get from the sun to earth.
159
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
The earth travels through space at 660,000 miles per hour.
189
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194