It can keep slower things in orbit, but not light.
It seems like keeping it in orbit would be worthwhile, even if better telescopes are sent up.
There have been concerted efforts to keep Mir in orbit.
Klingon governors often kept their seat of power in orbit.
He kept his ships in orbit one hundred miles above the planet.
For example, the Earth's moon is kept in orbit by the gravitational pull from the Earth.
If we'd kept the base in orbit we'd have to bring supplies to it constantly.
An online opinion poll showed 67% support worldwide for keeping it in orbit.
You'll get your building materials, and we'll keep the colony ships in orbit for defense.
It's gravity that kept you in orbit you and the Shuttle.