More astrophysics illustrations

Astrophysics

Deneb

Astrophysics

Angle of inclination

Astrophysics

Milky way disk spiral

Astrophysics

Polaris symbol

Astrophysics

Seepage feature

Astrophysics

Sun tilted

Astrophysics

Sphere of radius d

Astrophysics

Radial unit vector r hat