10 ms·
Hint of Planet X, something much larger than Pluto in the Kuiper belt, approaching the size of Earth. The evidence are several Kuiper objects with aligned, very
by peter303 10y ago
Hint of Planet X, something much larger than Pluto in the Kuiper belt, approaching the size of Earth. The evidence are several Kuiper objects with aligned, very eccentric orbits. If Planet X is in the outer range of its orbit, it may be too faint to seen with current telescopes.