what does nasa really have in orbit
An illustration depicts NASA's Juno spacecraft successfully entering Jupiter's orbit. Juno will study Jupiter from a polar orbit, coming about 3,000 miles (5,000 kilometers) from the cloud tops of the gas giant.
If people on Earth could only travel in deep space, you'd probably see a lot of traffic jams, Bill Borucki, NASA's chief Kepler scientist, joked Monday. The Kepler telescope peered at 42,000 stars, examining just a tiny slice of our galaxy to see how many planets like Earth are out there. Scientists then extrapolated that figure to the rest of the galaxy, which has hundreds of billions of stars.