The Hubble Space Telescope is in orbit around the earth at a height of 560 km above the earth's surface.
a. Calculate Hubble's speed.
b. In a servicing mission, a space shuttle spotted the Hubble telescope a distance of 10 km ahead. Estimate how long it took the shuttle to catch up with Hubble, assuming that the shuttle was moving in a circular orbit just 500 m below Hubble's orbit.