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

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

Cosmology

Compute cosmological properties of the universe:

1 billion years after the big bang

Compute cosmological properties, given a redshift:

redshift z=0.5

Black Holes

Compute properties of a black hole:

black hole 10 solar masses

Compute properties of a rotating black hole:

Kerr black hole

Asteroid Impacts

Calculate the outcome of an asteroid impact:

500m asteroid impact 17 km/s

Cosmic Rays

Find out how many cosmic rays reach Earth:

cosmic rays at 30000 ft for 1 hour