Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Astronomy
Galactic Year Calculator
Calculate how long it takes a star or object to complete one full orbit around the galactic center, given its orbital radius and velocity. Ideal for visualising cosmic timescales in astrophysics and astronomy coursework.
Fill in the required fields to see your result.
Astronomy
Planetary Mass Calculator
Determine the mass of a star or planet in solar masses from a satellite's orbital period and semi-major axis. Useful for astronomers and students applying Kepler's third law to real or hypothetical systems.
Fill in the required fields to see your result.
Key differences
| Galactic Year Calculator | Planetary Mass Calculator | |
|---|---|---|
| Category | Astronomy | Astronomy |
| Inputs required | 2 | 2 |
| Result | Galactic Year (million years) | Central Mass (M☉) |
| What it does | Calculate how long it takes a star or object to complete one full orbit around the galactic center, given its orbital radius and velocity. Ideal for visualising cosmic timescales in astrophysics and astronomy coursework. | Determine the mass of a star or planet in solar masses from a satellite's orbital period and semi-major axis. Useful for astronomers and students applying Kepler's third law to real or hypothetical systems. |