Some notable features: It is the source of short-period comets like Halley's Comet. The largest Kuiper Belt objects include Pluto, Haumea, Makemake, and Eris. Pluto was reclassified as a dwarf planet ...

Since its first edition, in 1906, The Chicago Manual of Style has been a vital reference for every book and magazine editor. The AP Stylebook guides many newspapers — though not The Washington Post, ...

There are nine named meteor showers left in 2024, with at least one meteor shower being active at all times. That means you ...

Halley’s Comet appears only once every 75 years, sparking excitement among both casual observers and astronomers. Learn what ...