Cold light: astronomers go to the ends of the Earth to see cosmic carbon
- Written by The Conversation Contributor
The edge of the Horsehead nebula, where it touches the empty space outside it, is rich in carbon.NASA, ESA, and the Hubble Heritage Team (STScI/AURA)The carbon cycle is central to life on Earth. It describes how carbon flows between living organisms, and the ocean, atmosphere and rock of our planet, and is driven by the energy from our sun.
But a...








