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Comets

An artist's impression of ESA's Rosetta approaching comet 67P/Churyumov-Gerasimenko. The comet image was taken on August 2, 2014, by the spacecraft's navigation camera at a distance of about 500 km. The spacecraft and comet are not to scale.

Scientists prepare for a historic landing on a ‘seething and sputtering and spitting’ comet

Science

If you think parallel parking is hard, then consider the European Space Agency’s latest mission. ESA’s Rosetta mission will attempt to land a small robot on a rocky comet barreling through space at more than 34,000 miles an hour.

Comets to Watch for in 2013