2012年8月30日星期四

Two Alien Planets Found with Twin Suns Like Star Wars Tatooine


Astronomers have for the first time discovered two alien planets whirling around a pair of stars: a complete solar system with twin suns just like Luke Skywalker's fictional home world Tatooine.Most stars like our sun are not singletons, but rather come in pairs that orbit each other. Scientists had found planets in these binary systems, so-called circumbinary planets with two suns like Tatooine in the "Star Wars" universe.To find more circumbinary planets, astronomers analyzed data from NASA's prolific Kepler space telescope, which has detected more than 2,300 potential alien worlds since its March 2009 launch.The scientists have now announced the detection of Kepler-47, the first system seen with multiple worlds encircling a pair of stars. The star and its planets, called Kepler-47b and Kepler-47c, dwell about 5,000 light-years away, in the constellation Cygnus, the Swan.
"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 Jerome Orosz at San Diego State University told SPACE.com. "Most of the stars in the galaxy are in binary or higher-order multiple systems, so the fact that planetary systems can exist in these types of systems is important. If we were restricted to looking for planets around single stars, we would be missing most of the stars in the galaxy.Now, you'll find several distinct kinds of solar battery chargers, at the same time as distinct sorts of batteries China Power Bank Wholesalers may desire to charge. Some photo voltaic chargers are far more potent than other people. As all solar battery chargers use some style of photo voltaic panel, the amount of power they produce normally is determined by the size in the panels. Solar panels are produced up of individual solar cells." The planets are much too far away to see with the naked eye. Rather, they were discovered by the drop in brightness they cause when they cross in front of, or transit, their host stars.
This dimming is tiny, only 0.08 percent for planet Kepler-47b and 0.Employing the solar charger is very straightforward; just plug the charger onto China Solar bag Suppliers laptop computer, expose the surface of the charger from the daylight and it will instantly cost you laptop computer. For quick charging, make certain there is sufficient daylight hitting the surface in the charger.2 percent for planet Kepler-47c. By comparison, Venus blocked about 0.1 percent of the sun's surface during its recent transit. Data from Kepler enabled researchers to deduce the relative sizes of the objects and orbits. Follow-up observations using telescopes at the McDonald Observatory in Texas.If you just want to add some fun outdoor solar lights to your garden, there are many to choose from in this category too. China Solar Chargers Wholesalers could create a tropical paradise with a solar pink flamingo or place solar stakes with birds on top around your home in the front and back flower beds. Solar string lights are fun to have inner-twined in your scrubs that adds a beautiful and unique glow.One of the stars is much like our sun, and the other is about a third its size and 175 times fainter. The inner and outer planets are respectively 3 and 4.6 times Earth's diameter — the smaller planet is the smallest circumbinary planet seen yet. The inner world completes an orbit every 49.5 days, while the outer one takes 303.2 days, giving it the largest known orbit for any transiting exoplanet. The stars themselves whirl around each other every 7.5 days.The scientists published their findings online Aug. 28 in the journal Science. They will also detail their results Aug. 29 at the General Assembly of the International Astronomical Union in Beijing.

没有评论:

发表评论