| It took about an hour to match velocities with the orbiting UFO, ample time for Erin to reaccustom himself to zero-G maneuvering. |
| Sifting through these observations, they were able to detect the white dwarf orbiting the pulsar and measure its color and temperature. |
| In a prolific career, Galileo's discoveries, including phases of Venus and moons orbiting Jupiter dealt a death blow to geocentric theory. |
| He discovered moons orbiting Jupiter, phases of Venus, sunspots, and features on the Moon that made it seem more like a planet. |
| There may be over a million pieces of space junk currently orbiting the Earth. |
| Spacecraft orbiting Earth can be found in several different types of orbits based on their altitude and orientation. |
