What does apsis mean?
The point in an elliptical orbit at which a celestial body is closest to or farthest from the body it is orbiting. In astronomy, the term is used to describe the closest and farthest points of an elliptical orbit.
Example
"The spacecraft reached its apsis at the outer edge of the solar system, marking the farthest point of its journey."
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.