The Discussion: As we welcome in the New Year, we discuss the holiday season and your suggestions to replace the Guide to the Electromagnetic Spectrum section of the show.

The News: Rounding up the astronomy news at the beginning of 2021, we have:

• Finding exoplanets that have a good chance of being able to see us
• The 'Missing Lithium Problem'
• Chasing down the Hubble Constant
• A new method for detecting exoplanets
• Was there another dwarf planet in the inner solar system?

Main News story: That intriguing radio signal found coming from the vicinity of Proxima Centauri.

The Sky Guide: This month we're taking a look at the great winter constellation of Auriga with a guide to its history, how to find it, a couple of deep sky objects and a round-up of the solar system views on offer in January.

Q&A: We know there is a lower temperature limit (absolute zero), but is there an upper temperature limit? From Matt in California.