Calculators, simulators, and visualizers built on real astrophysics. Complex orbital and atmospheric science, made explorable.
Tools unlock with a free account
create account →Input a star's luminosity and temperature. Visualize the inner and outer bounds of the habitable zone and compare known exoplanets within it.
Simulate the dimming signature of a planet transiting its host star. Adjust planet radius, orbital period, and stellar size in real time.
Explore the relationship between a planet's mass and radius across the full catalog. Identify compositional clusters: rocky, oceanic, gaseous.
Visualize absorption spectra for known atmospheric molecules — CO₂, H₂O, methane, oxygen — against the JWST wavelength range.
Search host stars by spectral type, distance, and number of known planets. Link through to every known world in a star's system.
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