WASHINGTON -- WASHINGTON (AP) — Space is vast, but it may not be so lonely after all: A study finds the Milky Way is teeming with billions of planets that are about the size of Earth, orbit stars just like our sun, and exist in the Goldilocks zone — not too hot and not too cold for life.
Astronomers using NASA data have calculated for the first time that in our galaxy alone, there are at least 8.8 billion stars with Earth-size planets in the habitable temperature zone.
The study was published Monday in the journal Proceedings of the National Academy of Science. As for what it says about the odds that there is life somewhere out there, it means "just in our Milky Way galaxy alone, that's 8.8 billion throws of the biological dice," said study co-author Geoff Marcy, a longtime planet hunter from the University of California at Berkeley.
The artist's concept depicts Kepler-62e, a super-Earth-size planet in the habitable zone of a star smaller and cooler than the sun, located about 1,200 light-years from Earth in the constellation Lyra.
The next step, scientists say, is to look for atmospheres on these planets with powerful space telescopes that have yet to be launched. The diagram compares the planets of the inner solar system to Kepler-62, a five-planet system about 1,200 light-years from Earth in the constellation Lyra. In the Milky Way, about 1 in 5 stars that are like our sun in size, color and age have planets that are roughly Earth's size and are in the habitable zone where life-crucial water can be liquid, according to intricate calculations based on four years of observations from NASA's now-crippled Kepler telescope. If people on Earth could only travel in deep space, "you'd probably see a lot of traffic jams," Bill Borucki, NASA's chief Kepler scientist, joked Monday. The Kepler telescope peered at 42,000 stars, examining just a tiny slice of our galaxy to see how many planets like Earth are out there. The diagram compares the planets of the inner solar system to Kepler-69, a two-planet system about 2,700 light-years from Earth in the constellation Cygnus.
For the first time, scientists calculated — not estimated — what percent of stars that are just like our sun have planets similar to Earth: 22 percent, with a margin of error of plus or minus 8 percentage points. Kepler scientist Natalie Batalha said there is still more data to pore over before this can be considered a final figure. There are about 200 billion stars in our galaxy, with 40 billion of them like our sun, Marcy said.


Based on the 1-in-5 estimate, the closest Earth-size planet that is in the habitable temperature zone and circles a sun-like star is probably within 70 trillion miles of Earth, Marcy said. An earlier study found that 15 percent of the more common red dwarf stars have Earth-size planets that are close-in enough to be in the not-too-hot, not-too-cold Goldilocks Zone. Put those together and that's probably 40 billion right-size, right-place planets, Marcy said. Scientists at a Kepler science conference Monday said they have found 833 new candidate planets with the space telescope, bringing the total of planets they've spotted to 3,538, but most aren't candidates for life. Kepler has identified only 10 planets that are about Earth's size circling sun-like stars and are in the habitable zone, including one called Kepler 69-c. Because there are probably hundreds of planets missed for every one found, the study did intricate extrapolations to come up with the 22 percent figure — a calculation that outside scientists say is fair. In this handout illustration made available on December 5, 2011 by NASA, the Kepler-22b, a planet known to comfortably circle in the habitable zone of a sun-like star is digitally illustrated. Party activities is a very important part that is worth mentioning, since the main idea at the party is for the kids to have fun. Give out craft supplies to create beautiful tiaras for girls to wear at the party and to keep.
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More in ARTS & CRAFTS, Party Ideas, TIPS FOR PARENTSHomemade Colorful Bubble WandsThe summer is approaching quickly and we spend more and more time outdoors. Seen in the foreground is Kepler-62f, a super-Earth-size planet in the habitable zone of a star smaller and cooler than the sun, located about 1,200 light-years from Earth in the constellation Lyra.
The five planets of Kepler-62 orbit a star classified as a K2 dwarf, measuring just two thirds the size of the sun and only one fifth as bright.


Scientists then extrapolated that figure to the rest of the galaxy, which has hundreds of billions of stars.
The two planets of Kepler-69 orbit a star that belongs to the same class as our sun, called G-type.
One of his co-authors put the number of sun-like stars closer to 50 billion, meaning there would be at least 11 billion planets like ours.
That's because scientists were looking only at sun-like stars, which are not the most common stars. For the first time NASA's Kepler mission has confirmed a planet to orbit in a star's habitable zone; the region around a star, where liquid water, a requirement for life on Earth, could persist. Without some fun games and activities, no matter how gorgeous your decoration are, party will not be a hit. The planet is 2.4 times the size of Earth, making it the smallest yet found to orbit in the middle of the habit.
Clouds could exist in this earth's atmosphere, as the artist's interpretive illustration depicts.
My two boys saw the movie a few times and each time they discovered something new and cool about it.
I can definitely say that Frozen will be the most popular party theme this year and the years to come. Looking ahead, I created a very long post collecting all the possible fun ideas to make Frozen Birthday Party a hit.




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