BBC Science

The Sky at Night

Find out more about everyone's favourite astronomy programme.

Stargazing LIVE star guide

Download your free guide to the stars and get the most out of the night sky.

Space blog

Jonathan Amos

Jonathan Amos

BBC Science Correspondent

Start Quote

"At this stage, it simply constrains what we believe it is made from, and as we get better measurements (closer up), there will be a lot of work to interpret whether the comet is heterogeneous...

Rosetta's 10-billion-tonne comet Thu, 21 Aug 2014 15:06:18 +0100

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.