Comet, 彗星

This image of Comet 67P/Churyumov–Gerasimenko was taken in April and released a few days ago in celebration of Rosetta’s first year studying the comet. ESA / Rosetta / Navcam / CC BY-SA IGO
11 Science Photos From This Week That Will Fill You With Awe
http://www.buzzfeed.com/kellyoakes/science-photos-aug-8

Last week, the comet made its closest approach to the sun, known as perihelion, (pictured) when it came to within 115 million miles (186 million km) of the star. The increasing solar radiation has been heating up the nucleus and recently caused its frozen ices to escape as gas and stream out into space at a greater rate
Mystery of why 67P 'sings' solved: Streams of charged particles blasting from the comet are causing vibrations around icy rock - Capitalbay Information Portal
http://www.capitalbay.com/news/871412-mystery-of-why-67p-sings-solved-streams-of-charged-particles-blasting-from-the-comet-are-causing-vibrations-around-icy-rock.html

Comet - Wikipedia, the free encyclopedia

彗星