January 5, 2005, is an astronomical anniversary that is not really marked but should be. It saw the discovery of dwarf planet ...

We went to the public library in Sham Shui Po during our school’s reading week. Hong Kong’s public libraries give us many ...

Learn about the size, temperature, and colour of each planet, and discover why Pluto is no longer considered a planet.

On January 5, 2005, astronomers at NASA discovered Eris, the second-largest dwarf planet in the solar system. Eris is just slightly smaller than Pluto, and it orbits the sun about three times farther ...