Explore exoplanets
The smallest known exoplanets
The 60 smallest planets with a measured radius: some are smaller than Mercury, found by the tiny shadows they cast as they cross their stars.
Open the visor| Name | Type | Size | Radius |
|---|---|---|---|
| Kepler-37 b | Earth-sized | 0.31 × Earth | 0.31 R⊕ |
| Kepler-37 e | Earth-sized | 0.37 × Earth | 0.37 R⊕ |
| Kepler-879 c | Earth-sized | 0.4 × Earth | 0.4 R⊕ |
| Kepler-444 b | Earth-sized | 0.4 × Earth | 0.403 R⊕ |
| Kepler-158 d | Earth-sized | 0.43 × Earth | 0.43 R⊕ |
| Kepler-102 b | Earth-sized | 0.46 × Earth | 0.46 R⊕ |
| Kepler-444 c | Earth-sized | 0.5 × Earth | 0.497 R⊕ |
| KOI-4777.01 | Earth-sized | 0.51 × Earth | 0.51 R⊕ |
| Kepler-1994 b | Earth-sized | 0.51 × Earth | 0.51 R⊕ |
| Kepler-1489 c | Earth-sized | 0.51 × Earth | 0.51 R⊕ |
| Kepler-1308 b | Earth-sized | 0.52 × Earth | 0.52 R⊕ |
| Kepler-444 d | Earth-sized | 0.53 × Earth | 0.53 R⊕ |
| Kepler-62 c | Earth-sized | 0.54 × Earth | 0.54 R⊕ |
| Kepler-444 e | Earth-sized | 0.55 × Earth | 0.546 R⊕ |
| GJ 238 b | Earth-sized | 0.57 × Earth | 0.566 R⊕ |
| Kepler-102 c | Earth-sized | 0.57 × Earth | 0.567 R⊕ |
| Kepler-42 d | Earth-sized | 0.57 × Earth | 0.57 R⊕ |
| Kepler-1583 b | Earth-sized | 0.6 × Earth | 0.6 R⊕ |
| Kepler-1998 b | Earth-sized | 0.6 × Earth | 0.6 R⊕ |
| Kepler-963 c | Earth-sized | 0.6 × Earth | 0.6 R⊕ |
| KOI-1843.03 | Earth-sized | 0.61 × Earth | 0.61 R⊕ |
| Kepler-1087 b | Earth-sized | 0.61 × Earth | 0.61 R⊕ |
| K2-89 b | Earth-sized | 0.61 × Earth | 0.615 R⊕ |
| Kepler-1877 b | Earth-sized | 0.62 × Earth | 0.624 R⊕ |
| Kepler-138 b | Earth-sized | 0.64 × Earth | 0.64 R⊕ |
| Kepler-1371 c | Earth-sized | 0.64 × Earth | 0.64 R⊕ |
| K2-137 b | Earth-sized | 0.64 × Earth | 0.64 R⊕ |
| Kepler-1130 d | Earth-sized | 0.64 × Earth | 0.645 R⊕ |
| Kepler-1351 b | Earth-sized | 0.65 × Earth | 0.65 R⊕ |
| Kepler-1542 c | Earth-sized | 0.65 × Earth | 0.65 R⊕ |
| Kepler-271 d | Earth-sized | 0.66 × Earth | 0.66 R⊕ |
| Kepler-431 c | Earth-sized | 0.67 × Earth | 0.668 R⊕ |
| Kepler-1558 b | Earth-sized | 0.68 × Earth | 0.68 R⊕ |
| LHS 1678 b | Earth-sized | 0.69 × Earth | 0.685 R⊕ |
| Kepler-141 b | Earth-sized | 0.69 × Earth | 0.69 R⊕ |
| K2-116 b | Earth-sized | 0.69 × Earth | 0.69 R⊕ |
| EPIC 201497682 b | Earth-sized | 0.69 × Earth | 0.692 R⊕ |
| Kepler-378 c | Earth-sized | 0.7 × Earth | 0.7 R⊕ |
| Kepler-1349 b | Earth-sized | 0.7 × Earth | 0.7 R⊕ |
| KOI-4978 b | Earth-sized | 0.7 × Earth | 0.7 R⊕ |
| K2-266 c | Earth-sized | 0.7 × Earth | 0.705 R⊕ |
| Kepler-1339 b | Earth-sized | 0.71 × Earth | 0.71 R⊕ |
| Kepler-1559 b | Earth-sized | 0.72 × Earth | 0.72 R⊕ |
| Kepler-1850 b | Earth-sized | 0.73 × Earth | 0.729 R⊕ |
| Kepler-42 c | Earth-sized | 0.73 × Earth | 0.73 R⊕ |
| Kepler-124 b | Earth-sized | 0.73 × Earth | 0.73 R⊕ |
| Kepler-1371 b | Earth-sized | 0.73 × Earth | 0.73 R⊕ |
| Kepler-1967 b | Earth-sized | 0.73 × Earth | 0.73 R⊕ |
| GJ 367 b | Earth-sized | 0.74 × Earth | 0.736 R⊕ |
| Kepler-125 c | Earth-sized | 0.74 × Earth | 0.74 R⊕ |
| Kepler-345 b | Earth-sized | 0.74 × Earth | 0.74 R⊕ |
| Kepler-1869 c | Earth-sized | 0.74 × Earth | 0.74 R⊕ |
| Kepler-444 f | Earth-sized | 0.74 × Earth | 0.741 R⊕ |
| Kepler-1963 b | Earth-sized | 0.74 × Earth | 0.744 R⊕ |
| Kepler-378 b | Earth-sized | 0.75 × Earth | 0.75 R⊕ |
| Kepler-1563 b | Earth-sized | 0.75 × Earth | 0.75 R⊕ |
| HD 23472 d | Earth-sized | 0.75 × Earth | 0.75 R⊕ |
| Kepler-1864 b | Earth-sized | 0.75 × Earth | 0.754 R⊕ |
| Kepler-37 c | Earth-sized | 0.76 × Earth | 0.755 R⊕ |
| TRAPPIST-1 h | Earth-sized | 0.76 × Earth | 0.755 R⊕ |