In simple terms, ascending and descending orbits describe two modes of satellite flight relative to the Earth's rotation ...

The planets of our solar system all orbit the Sun within a few degrees of a flat plane extending out from our star’s equator — its equatorial plane. That makes sense. Our solar system began as a ...

"The complexity of the exo-Neptunian landscape provides offers a unique window onto the processes involved in the formation ...

Orbital transfer vehicles launch atop rockets, carrying other spacecraft that they deliver to specific, often hard-to-reach, orbits. The new early-stage studies for NASA should be complete by ...