The Discussion: As we begin the new decade we struggle to find a consensus on whether it actually is a new decade. We discuss the busy Xmas period and thank any listeners who helped Dartmoor Skies reach their funding target for a new telescope. Then we take a look at a few listeners' emails and tweets.

The News: Rounding up the astronomy news this month we have:

• An old galaxy containing as much dust as one third the amount of its stars
• Mapping the magnetic fields around the Whale Galaxy
• An interstellar comet makes its way back out of the solar system
• A burst of supernovae in the Milky Way's not-to-distant past
• Is Betelgeuse about to go supernova?

The Sky Guide: Shaking up the format of the sky guide, we're taking a look at the constellation of Monoceros with a guide to its history, how to find it, a couple of deep sky objects and a round up of the solar system objects on offer in January.

Q&A: If there are no plate tectonics on the moon, how did the lunar mountain regions form? from @gkt_wales on Twitter