Unggulan
- Distance modulus & stellar magnitude calculator
Compute distance, apparent magnitude, or absolute magnitude from the distance modulus m - M = 5 log10(d/10 pc), and see how brightness scales with distance using a simple 1/r^2 graph.
- Kepler's third law & orbital period calculator
Compute orbital periods and semi-major axes from Kepler's third law, compare with Solar System planets on a log–log a–T diagram, and see a top-down orbit scale view.