How Many Planets Can Fit Inside a Star's Habitable Zone?

How many planets can fit into the habitable zone around a star? The answer they came up with is five rocky planets the mass of Earth around a small, dim star (called a red dwarf). In the past 20 years or so, astronomers have confirmed the existence of nearly 3,400 planets outside Earth's solar system, many of which NASA's Kepler space telescope discovered.

Read More http://ift.tt/2dXZbaH