S63E08
08 Sept 2019Alien Worlds
The Sky at Night – Season 63
Astronomers have found more than 4,000 planets circling stars other than our own. What do we know about these alien worlds and how have we managed to detect them?
The Sky at Night – Season 63
Astronomers have found more than 4,000 planets circling stars other than our own. What do we know about these alien worlds and how have we managed to detect them?