🔭 Astrophysics
Chapter 11 · 4 simulations — tap one to open it.
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Chapter 11
Hubble's Law & Expanding Universe
See galaxies recede faster the farther they are (v = H₀·d).
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Chapter 11
Stellar Parallax
Measure a star's distance from the tiny shift as Earth orbits the Sun.
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Chapter 11
Doppler Redshift
Move a star and watch its spectral lines shift red or blue.
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Chapter 11
H–R Diagram
Plot a star by temperature and luminosity to classify it.