Planet HAT-P-1b orbits a star in a double star system. (Image credit: David A. Aguilar (CfA)) It's extremely large for its mass. In this picture, both stars are included - one is quite far away. Mona Evans, "Exotic Exoplanets Tour" http://www.bellaonline.com/articles/art32334.asp
Space Image Extrasolar Planet Yellow Orange Blue Print by Matthias Hauser. All prints are professionally printed, packaged, and shipped within 3 - 4 business days. Choose from multiple sizes and hundreds of frame and mat options.
The most Earth-like world yet detected beyond our solar system has been discovered, scientists say. With a radius that is just 1.5 times that of Earth, the potential planet is a so-called “super-Earth,” meaning it is just slightly larger than the Earth. The planet orbits a star similar to the sun at a distance that falls within the “habitable zone”, the region where liquid water could exist on the planet’s surface. The planet, if confirmed, could be a prime candidate to host alien life.
Space Image Extrasolar Planet Yellow Orange Blue Print by Matthias Hauser
Space Image: Extrasolar planet, wonderful yellow, orange and blue tones. Artists impression of the extrasolar planet HD 189733b, now known to have methane and water. Astronomers used the Hubble Space Telescope to detect methane - the first organic molecule found on an extrasolar planet. Posters and prints (framed, canvas, metal and acrylic) for sale. Credit: ESA, NASA, G. Tinetti (University College London, UK & ESA) and M. Kornmesser (ESA/Hubble)
Artist’s impression of a hot Jupiter exoplanet in the star cluster Messier 67 - This artist’s impression shows a hot Jupiter planet orbiting close to one of the stars in the rich old star cluster Messier 67, in the constellation of Cancer (The Crab). More information: http://www.eso.org/public/images/eso1621a/ Credit: ESO/L. Calçada
Scientists have only searched through a tiny fraction of our galaxy, and with the fast advances in technology, we can expect many more interesting discoveries in the future. But for now, check out the handy infographic below, courtesy of Space.com, displaying all known types of alien worlds.