Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Astronomy
Exoplanet Habitable Zone Calculator
Estimate the inner and outer boundaries of a star's habitable zone based on its luminosity, spectral type, and a planet's mass. Use it when assessing whether a known exoplanet could support liquid water on its surface.
Fill in the required fields to see your result.
Astronomy
Comet Perihelion Velocity Calculator
Calculate a comet's maximum speed at perihelion — its closest point to the Sun — using the vis-viva equation. Useful for students, astronomers, and space enthusiasts studying comet dynamics and orbital mechanics.
Fill in the required fields to see your result.
Key differences
| Exoplanet Habitable Zone Calculator | Comet Perihelion Velocity Calculator | |
|---|---|---|
| Category | Astronomy | Astronomy |
| Inputs required | 3 | 2 |
| Result | Optimal Habitable Distance (AU) | Perihelion Velocity (km/s) |
| What it does | Estimate the inner and outer boundaries of a star's habitable zone based on its luminosity, spectral type, and a planet's mass. Use it when assessing whether a known exoplanet could support liquid water on its surface. | Calculate a comet's maximum speed at perihelion — its closest point to the Sun — using the vis-viva equation. Useful for students, astronomers, and space enthusiasts studying comet dynamics and orbital mechanics. |