In 2006, the International Astronomical Union reclassified Pluto as a dwarf planet.
This is because Pluto does not gravitationally dominate the neighborhood around its orbit
2019
Scientists once believed that the same side of Mercury always faced the Sun.
In 1965 astronomers discovered that the planet rotates three times during every two orbits it makes.
2008
Triton is gradually getting closer to the planet it orbits.
Scientists believe that when Triton eventually gets too close to Neptune, it will be torn apart by the planet’s gravity
2020
