Concept
Black Holes
Regions where gravity stops light itself.
Concentrations of mass so dense that nothing — not even light — can escape past the event horizon. Form from collapsed massive stars (stellar) or grow in galactic cores (supermassive).
Spaghettification
Near a black hole, the gravity difference between your head and feet stretches you into a thin strand.
See also
Lagrange Points
Five spots where gravity and orbital motion balance.
Photon Sphere
Where light itself can orbit a black hole.
The Habitable Zone
Where liquid water can exist on a planet's surface.
Termination Shock
Where the solar wind slows from supersonic to subsonic.
Zodiacal Dust
The dust cloud lit up as zodiacal light.
Hill Sphere
The volume in which a body's gravity dominates.