Support the news

A Journey To The Oort Cloud, Where Comets Are Born17:29Download


The comet ISON, discovered by two amateur astronomers last year, will zoom past the Earth next fall. But where did it come from? Astronomer Andrew Fraknoi says a passing star could have flung the comet our way from the Oort Cloud, a distant realm of ice chunks at the outer limits of the solar system.


+Join the discussion

More from WBUR

Support the news