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Both calculators run independently — change the inputs on either side to compare results.
Astronomy
Escape Velocity Calculator
Find the minimum speed an object must reach to escape a celestial body's gravity without further propulsion. Essential for mission planning, planetary science, and understanding why some atmospheres are retained.
Fill in the required fields to see your result.
Astronomy
Redshift Velocity Calculator
Compute the recession velocity of a nearby galaxy from its redshift z using v = c·z, where c is the speed of light. Part of the Hubble-Lemaître law — the empirical relation that established the expanding universe.
Fill in the required fields to see your result.
Key differences
| Escape Velocity Calculator | Redshift Velocity Calculator | |
|---|---|---|
| Category | Astronomy | Astronomy |
| Inputs required | 2 | 1 |
| Result | Escape Velocity (km/s) | Recession Velocity (km/s) |
| What it does | Find the minimum speed an object must reach to escape a celestial body's gravity without further propulsion. Essential for mission planning, planetary science, and understanding why some atmospheres are retained. | Compute the recession velocity of a nearby galaxy from its redshift z using v = c·z, where c is the speed of light. Part of the Hubble-Lemaître law — the empirical relation that established the expanding universe. |