An artist's illustration of the alien solar system Kepler-47, a twin star system that is home to two planets. The planets have two suns like the fictional planet Tatooine in the "Star Wars" universe.

Here’s how it works. The alien solar system Kepler-47 joins four previously discovered double-star systems that have only one planet each. Most of the stars in our galaxy that are like our sun ...

In fact, Kepler 47 is the only known multi-planet system ... This tightly packed system has little in common with our solar system, and astronomers are therefore eager to learn all they can ...

[Planets of the Tatooine-like Solar System (Gallery) ] "Kepler-47 shows us that binary stars can have close-in planetary systems, just like the ones we see in single stars," study lead author ...

In Kepler-47, two stars whirl around each other, orbiting each other in every seven and a half days some 5000 light-years away from our solar system. The planet closest to the suns is about three ...

If placed in our solar system, Kepler-11g would orbit between Mercury ... The inner five exoplanets have orbital periods between 10 and 47 days around the dwarf star, while Kepler-11g has a ...

Our solar system, in contrast ... For example, Kepler-11 has six known planets that complete one orbit around their star in about 10, 13, 23, 32, 47, and 118 days (period ratios of 1.3, 1.7 ...

Researchers have known about the existence of three exoplanets – the term for planets outside our solar system – within the Kepler-138 system but have only just discovered two of them are ...