Empirical head-to-head comparison table, delta analysis, and interactive formula calculators.
| Category | Terrestrial Planet |
| Parent Body | Sun |
| Radius km | 3396.2 |
| Oblateness | 0.00589 |
| Sidereal Rotation h | 24.623 |
| Axial Tilt deg | 25.19 |
| Surface Gravity m s2 | 3.721 |
| Mean Distance AU | 1.524 |
| Atmospheric Composition | 95.32% CO2, 2.6% N2, 1.9% Ar |
| Category | Planetary Moon |
| Parent Body | Mars |
| Radius km | 11.267 |
| Oblateness | 0.31 |
| Sidereal Rotation h | 7.65 |
| Axial Tilt deg | 0 |
| Surface Gravity m s2 | 0.0057 |
| Mean Distance AU | 1.524 |
| Atmospheric Composition | None |
Direct comparative ratio of core numeric metrics between Mars (Cyan) and Phobos (Gold).
Mars and Phobos represent distinct specifications within Planetary & Lunar Worlds. Reference the side-by-side data table above for exact empirical values.
Yes. GemsMakers offers a high-speed, zero-authentication JSON REST API at https://gemsmakers.com/api/v1/calculate.php and downloadable datasets in both CSV and JSON formats under CC BY 4.0.