A system with seven earths of terrestrial size

A team of astronomers has revealed the first system known to harbor seven Earth-sized planets around an individual star (called TRAPPIST-1b, c, d, e, f, g and h). Three of these planets lies within the habitable zone, the area around the star where a rocky planet could hold liquid water on its surface, a key to life as we know it.

Kepler Spacecraft Should Pin Down 'Alien Earth' Planets Despite Glitch

NASA's planet-hunting Kepler spacecraft should be able to achieve its primary mission goal regardless of whether or not it can bounce back from a recent malfunction, researchers say.

Kepler launched in March 2009 on a 3.5-year prime mission to determine how common Earth-like planets are throughout the Milky Way galaxy. 

A galaxy settled by traveling planets

The endurance of planets lonely worlds turn around a star, but float alone traveling in space. Far from being an exception, these planets, which may have been expelled from their systems, are very numerous. Researchers from the Kavli Institute for Particle Astrophysics and Cosmology (KIPAC), an independent laboratory of Stanford University in Palo Alto, California, believe that, in fact, there are 100,000 for every star that exists in our galaxy. The Milky Way is full.

Our Solar System

Our solar system consists of its major star, the Sun and a set of body is not just about the eight planets now known, that because the August 24, 2006 the International Astronomical Union meet in Prague which was define planet or to be careful as such or the function of the sound "planet" Pluto was leaving because their individuality do not conform to what is intended by the planet, so going to be a planetoid and for that reason, our Solar System now includes nine planets, but eight, this termination is due to the amount of various bodies that have different sizes orbiting like planets around the Sun as asteroids, comets, meteoric bodies, interplanetary dust and gas, which make this set we call the solar system.

AROUND TWO SUNS THRIVE NASA TELESCOPE TO FIND PLANETS

Using the Spitzer Space Telescope NASA astronomers have observed that planetary systems - dusty disks of asteroids, comets and possibly planets - are so abundant in double star systems as single stars in systems such as ours. Since more than half of all stars are twins, or binaries, the finding suggests that the universe is full of planets with two suns. Sunsets on some of those worlds would resemble that of Luke Skywalker's planet, Tatooine, where two fiery balls dip below the horizon one by one.