More astrophysics illustrations

Astrophysics

Radar beam conical

Astrophysics

Angle theta

Astrophysics

Spherical molecular cloud centrally condensed

Astrophysics

He i atom excited

Astrophysics

Stellar surface contracted

Astrophysics

Long period variable star

Astrophysics

Infrared emission cloud

Astrophysics

Luminosity arrow