Great question! The answer is yes. In fact, as of today, there are 404 known planets beyond our Solar System! Like Earth, these planets spin around a huge star. In our Solar system, this star is called the Sun. 

Out of the 404 planets, many are gas giants. This means they have no surface that you can land on (think Jupiter). Some of these planets are really close to their  they're orbiting and others are far away. What's so amazing is that some planets are just the right distance from their star that their temperature and atmosphere allows for the possibility of life. Can you imagine meeting an alien from another planet? It's not as crazy as you think!

Recently, scientists have found a planet called Gliese 581d. This planet is just the right distance away from its Star. Scientists think that these conditions allow it to have liquid water (which is necessary for life). This star is 8 times the mass of Earth and it is 117,000,000,000,000 miles away from us! It's a long-long ways away!

Solar System: a system of stars and planets in which we live. It consists of one star, the Sun, and the following planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Note that Pluto is no longer called a planet.

Pluto: Believe it or not, Pluto is no longer called a planet. How can a planet no longer be a planet? Well, Pluto didn't change; it's our understanding of planets that did. Scientists now say that a planet is a body that 1) orbits, or "spins", around the Sun, 2) is round and 3) is not influenced by other bodies (such as meteors) in its orbit around the Sun. Pluto fails 3) because there are heavier objects in its orbit.