Couching her petition in a mix of modesty and expertise, Herschel became the first woman to have a scientific paper read to the Royal Society of London.

Even the invention of the telescope couldn't convince all people to put aside superstitions about comets.

A recently completed analysis of comet 67P/C-G by the Rosetta Space Craft has effectively ruled out comets as the primary source of Earth’s water.

Last week, the European Space Agency (ESA) successfully landed an unmanned probe (Philae) on a comet, a feat heretofore unmatched in human history