57 



Figure IV-3.— Jupiter, the largest planet in our solar system, has an atmosphere 

 dominated by hydrogen, and has a retinue of satellites analogous to the planets 

 of the solar system. 



that its moons are very different from those of Jupiter. By analogy, 

 one might expect the planets of a red dwarf star to differ consider- 

 ably from the planets in our own system. But even given another star 

 like the Sun, what are the chances of finding another planet like 



