Dark energy
by Gemma Church
Produces a repulsive force to repel (push away) things
AstronomyDecember 4, 2019
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Dark matter
by Gemma Church
Matter that does not absorb, reflect or emit light or energy
Photons
by Gemma Church
Particles that exchange the electromagnetic force (including light)
Atoms
by Gemma Church
The smallest bits of matter with chemical and physical properties