Planet
The smallest known planet is PSR B1257+12A, one of the first extrasolar planets discovered, which was found in 1992 in orbit around a pulsar. Its mass is roughly half that of the planet Mercury. The smallest known planet orbiting a main-sequence star other than the Sun is Kepler-37b, with a mass (and radius) slightly higher than that of the Moon.
Comoros
At , it is one of the smallest countries in the world. The Comoros also has claim to of territorial seas. The interiors of the islands vary from steep mountains to low hills.