More astrophysics illustrations

Astrophysics

Infrared radiation band

Astrophysics

Solar nebula disk

Astrophysics

Hydrogen atom first excited state

Astrophysics

Hydrogen alpha emission region

Astrophysics

12 lacertae

Astrophysics

Ptolemaic model

Astrophysics

Yellow circle

Astrophysics

Spectral line split multiplet