The Ring of Charon

Blurb

The Ring of Charon is a science fiction book by American writer Roger MacBride Allen, first published in 1990 by Tor Books. It is the first in a series of three books under the name of The Hunted Earth.
The story unfolds as an unknown alien race captures Earth with the use of a controlled wormhole, which was triggered accidentally by artificial gravity experiments issued from a human outpost in space. The story follows all three viewpoints: the earth, the solar system and the alien race.