Wednesday, February 22, 2017
The Seven Daughters of Trappist-1
The discovery of rocky planets around red dwarf star is also pretty cool, since they are the most common stars in the galaxy, especially our part; within 30 light years of the earth there are 250 red dwarf stars but only 20 in the same class as our sun. That's a lot of potential planets close enough for us to observe them directly.
It is amazing to me how quickly the discovery of planets around other stars has become routine. The first serious claim was not made until 1988, and that was very controversial; the first widely accepted claim was made in 1992. In the 25 years since the list has grown to more than 3,500 planets, and it gets longer every day.