10 Remarkable Exoplanets


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MOA-2007-BLG-192-Lb
MOA-2007-BLG-192 Lb may resemble our solar system buddy pictured here, Neptune.
MOA-2007-BLG-192 Lb may resemble our solar system buddy pictured here, Neptune.
Antonio M. Rosario/Getty Images

MOA-2007-BLG-192-Lb, or more succinctly MOA-192b, may not have the catchiest name in the galaxy, but it's a fascinating planet nonetheless. For instance, it has a mass only three times greater than Earth's, making it one of the smallest exoplanets ever discovered (and yet another super-Earth) [source: Kerr].

The planet orbits a star much smaller than the sun -- a star so small, in fact, that it can't sustain fusion reactions -- which is why astronomers believe MOA-192b is an icy, gassy planet like Neptune rather than a temperate planet like Earth. And while the planet is likely too chilly to make a good home, it gives us hope that smaller, Earth-sized planets may be abundant elsewhere in the cosmos.

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