More astrophysics illustrations

Astrophysics

Lens diverging

Astrophysics

Distance element ds

Astrophysics

Equatorial disk

Astrophysics

Apollo retroreflector

Astrophysics

Hydrogen helium envelope

Astrophysics

Strobe light

Astrophysics

Radio signal waveform

Astrophysics

Microlensing light curve