Here’s how it works. (Image credit: ESA. Courtesy of MPAe, Lindau) On July 2, 1985, the European Space Agency launched the Giotto space probe to get a close-up look at Halley's Comet.

This election cycle saw its fair share of so-called “fake news.” On December 4, an armed man walked into a Washington, DC, pizza joint, claiming he needed to investigate a story he had heard ...

Asteroids are composed of metals and rock, whereas comets also contain ice and dust. The Kuiper belt is a collection of such bodies that orbits at the edge of the solar system.