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Both calculators run independently — change the inputs on either side to compare results.
Astronomy
Apparent Magnitude Calculator
Convert a star's absolute magnitude and distance in parsecs into its apparent magnitude — how bright it looks from Earth. Essential for astronomy students comparing stellar brightness across different distances.
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
| Apparent Magnitude Calculator | Redshift Velocity Calculator | |
|---|---|---|
| Category | Astronomy | Astronomy |
| Inputs required | 2 | 1 |
| Result | Apparent Magnitude (mag) | Recession Velocity (km/s) |
| What it does | Convert a star's absolute magnitude and distance in parsecs into its apparent magnitude — how bright it looks from Earth. Essential for astronomy students comparing stellar brightness across different distances. | 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. |