What is dark energy?

Star Diary - A podcast by BBC Sky at Night Magazine - Sundays

Cosmologist Dr Eva-Maria Mueller reveals how we know the expansion of the Universe is accelerating, what this 'dark energy' might be, and how we can hope to solve the mystery. Hosted on Acast. See acast.com/privacy for more information. Learn more about your ad choices. Visit podcastchoices.com/adchoices