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Not too hot, not too cold: New Earth-like planet could
Not too hot, not too cold: New Earth-like planet could

... Gliese 581g is a prime spot for the potential existence of extraterrestrial life, scientists say. Photo / AP The search for a faraway planet that could support life has found the most promising candidate to date, in the form of a distant world some 193,000 billion kilometres away from Earth. Scienti ...
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... 45. Although Mars and Mercury are nearly equal in size, Mars has more of an atmosphere because Mars is _____ 46. A _____ is a body in the solar system which revolves around another, larger object other than the Sun. 47.The principle element of the atmosphere of Earth is ______ 48.The planets which, ...
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Components of the Solar System Learning Targets
Components of the Solar System Learning Targets

... activity, no moons, largest difference in temperature Venus hottest, greenhouse effect, dense atmosphere, rotates opposite of other planets, Earth’s sister (because of size only), layers, volcanic activity, longest day (day is longer than its year), no moons, Earth liquid water, one moon, layers, at ...
Word doc - UC-HiPACC - University of California, Santa Cruz
Word doc - UC-HiPACC - University of California, Santa Cruz

... 847 and counting: that’s the number of planets confirmed as existing around 642 stars within several hundred light-years of our Sun. And more than 2,000 additional detections are awaiting confirmation by follow-up observations. By far, the most potential exoplanets have been found by the NASA spacec ...
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... Lively and colorful illustrations provide a fun introduction to the solar system. Fictitious postcards from each planet can give children a creative impetus for their own reports. Keep in mind that since the book was written, Pluto has been reclassified as a dwarf planet and additional moons have be ...
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... large planets and microscopic dust particles, which orbit around it. As a unit, the solar system has a center of mass, its balancing point. At this point, the system would balance like a spinning plate atop a circus performer's balancing stick. This point, called the barycenter, is the exact point a ...
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Marine Bio Lab CCR Notes Chapter 3

... The nebular theory is the theory that the solar system formed from a nebula. According to nebular theory, Earth and other planets formed due to a process called accretion. The process by which matter became layered according to density during Earth’s formation, with heavier matter near the core and ...
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Solar System and Astronomy puzzle 001

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Our Solar System The Sun

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title of lesson plan - Discovery Education

... 1. Describe the nine planets in the solar system. Compare and contrast the other planets with Earth. How are the four inner planets different from the five outer planets? 2. Explain the various technologies that astronomers use to study the planets and their moons. 3. Compare the use of robots and s ...
OUR SOLAR SYSTEM
OUR SOLAR SYSTEM

... Elements heavier than hydrogen and helium were formed in the cores of ancient and exploding stars, so the first generation of stars had to die before the universe could be enriched with these atoms. The oldest stars contain few metals, while stars born later have more. This high metallicity is thoug ...
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Extraterrestrial life



Extraterrestrial life is life that does not originate from Earth. It is also called alien life, or, if it is a sentient and/or relatively complex individual, an ""extraterrestrial"" or ""alien"" (or, to avoid confusion with the legal sense of ""alien"", a ""space alien""). These as-yet-hypothetical life forms range from simple bacteria-like organisms to beings with civilizations far more advanced than humanity. Although many scientists expect extraterrestrial life to exist, so far no unambiguous evidence for its existence exists.The science of extraterrestrial life is known as exobiology. The science of astrobiology also considers life on Earth as well, and in the broader astronomical context. Meteorites that have fallen to Earth have sometimes been examined for signs of microscopic extraterrestrial life. Since the mid-20th century, there has been an ongoing search for signs of extraterrestrial intelligence, from radios used to detect possible extraterrestrial signals, to telescopes used to search for potentially habitable extrasolar planets. It has also played a major role in works of science fiction. Over the years, science fiction works, especially Hollywood's involvement, has increased the public's interest in the possibility of extraterrestrial life. Some encourage aggressive methods to try to get in contact with life in outer space, whereas others argue that it might be dangerous to actively call attention to Earth.
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