Concept
Dark Matter Halo
A galaxy's enveloping cloud of invisible matter.
The roughly spherical distribution of dark matter surrounding and dominating the gravitational mass of galaxies.
Overview
The roughly spherical distribution of dark matter surrounding and dominating the gravitational mass of galaxies.
See also
Dark Matter
The invisible mass holding galaxies together.
Zodiacal Dust
The dust cloud lit up as zodiacal light.
Baryon Asymmetry
Why there is matter and almost no antimatter.
Cold Neutral Medium
Cool, denser neutral hydrogen clouds.
The Big Bang
How everything began, 13.8 billion years ago.
Black Holes
Regions where gravity stops light itself.