Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Astronomy
Planet Visibility Calculator
Find the best times to observe Jupiter, Saturn, Mars, or Venus from your location. Enter your latitude and how many days you are from opposition to get a visibility score in degrees.
Fill in the required fields to see your result.
Astronomy
Planetary Transit Calculator
Estimate when inner planets Mercury and Venus will cross the disk of the Sun as seen from a specific location on Earth. Used by astronomers and educators to plan observations of these rare celestial events.
Fill in the required fields to see your result.
Key differences
| Planet Visibility Calculator | Planetary Transit Calculator | |
|---|---|---|
| Category | Astronomy | Astronomy |
| Inputs required | 3 | 2 |
| Result | Maximum Altitude (°) | Next Transit in (days) |
| What it does | Find the best times to observe Jupiter, Saturn, Mars, or Venus from your location. Enter your latitude and how many days you are from opposition to get a visibility score in degrees. | Estimate when inner planets Mercury and Venus will cross the disk of the Sun as seen from a specific location on Earth. Used by astronomers and educators to plan observations of these rare celestial events. |