60 billion alien planets could support life and that is just in the Milky Way, according to a new study.

About a dozen habitable exoplanets have been detected, there's 60 billion alien planets that could support life.

NASA's planet-hunting Kepler spacecraft, scientists have predicted that there should be one Earth-size planet in the habitable zone of each red dwarf, which is the most common type of star. With 60 billion alien planets that could support life as the study said, and one reason is because cloud cover might help an alien planet support life.

"Clouds cause warming, and they cause cooling on Earth," study researcher Dorian Abbot, an assistant professor in geophysical sciences at the University of Chicago, said in a statement. "They reflect sunlight to cool things off, and they absorb infrared radiation from the surface to make a greenhouse effect. That's part of what keeps the planet warm enough to sustain life."

"If you look at Brazil or Indonesia with an infrared telescope from space, it can look cold, and that's because you're seeing the cloud deck," Nicolas Cowan, a postdoctoral fellow at Northwestern University told Fox News. "The cloud deck is at high altitude, and it's extremely cold up there."

If a planet has the right temperature to keep liquid water on its surface, it could potential for life on that planet. If a planet is too far from its star, its water freezes; too close, water vaporizes, according to the study. Since red dwarfs are dimmer and cooler than our sun, their habitable zone is much cozier than our solar system's.

"If you're orbiting around a low-mass or dwarf star, you have to orbit about once a month, once every two months to receive the same amount of sunlight that we receive from the sun," Cowan said.