Using Pluto as an example, this celestial body, once considered the ninth planet, was redefined as a dwarf planet in 2006.
Astronomers around the world have confirmed over 6,000 exoplanets, a milestone reached in September 2025. Billions more are waiting to be discovered.
Researchers are discussing 2025 PN7, a small celestial body that's following a similar orbital path to our planet's without being gravitationally tied to Earth ...