Physics
# Astrophysics

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Celestial Mechanics

compute the orbital period of a massive body orbiting another

Kepler's third law, 4 solar masses, 5 Earth masses, 2.5 AU
interactively compute the orbital speed of a body

circular orbit speed
visualize relation between eccentric and true anomaly

mean anomaly 85 degrees eccentricity 0.6
compute locations of Lagrange points

Lagrange points Earth and Moon
investigate the relationship between orbital distance and phase

orbital radius with eccentricity 0.7 and semimajor axis 17.8 AU
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Luminosity

compute the luminosity of a star of specified mass

luminosity 10 solar masses
compute luminosity from apparent magnitude and distance

luminosity app magnitude 2.5, d=20 light years
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Cosmology

compute cosmological properties of the universe

1 billion years after the big bang
compute cosmological properties, given a redshift

redshift z=0.5
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Black Holes

compute properties of a black hole

black hole 10 solar masses
compute properties of a rotating black hole

Kerr black hole
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Asteroid Impacts

calculate the outcome of an asteroid impact

500m asteroid impact 17 km/s
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Cosmic Rays

find out how many cosmic rays reach Earth

cosmic rays at 30000 ft for 1 hour