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Meet the Dwarf Planets Pluto: The Demoted Former Planet
Meet the Dwarf Planets Pluto: The Demoted Former Planet

... asteroid belt, containing about one-third of the belt's mass. However, at 590 miles (950 km) across, it is the smallest known dwarf planet. Because it's so much closer to Earth than the other dwarf planets, Ceres was discovered far earlier. Italian astronomer Giuseppe Piazzi spotted it first, on Jan ...
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... inner edge begins around 25 AU away, farther than the average orbital distance of Uranus in the Solar System. Its outer edge appears to extend as far out as 550 AUs away from the star. Analysis of Hubble Space Telescope data indicated that planets were only beginning to form around Beta Pictoris, a ...
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Stephen Ashworth

... example, are not classified as centaurs, even though their orbits may cross one or more planetary orbits in the inner Solar System. Unless the term is extended to cover all such cases, a planet-crosser discovered in an exosolar system would not be a centaur. It may be desirable to adopt a term such ...
A Binary Mass-Orbit Nomenclature for Planetary Bodies
A Binary Mass-Orbit Nomenclature for Planetary Bodies

... example, are not classified as centaurs, even though their orbits may cross one or more planetary orbits in the inner Solar System. Unless the term is extended to cover all such cases, a planet-crosser discovered in an exosolar system would not be a centaur. It may be desirable to adopt a term such ...
Chapter 26 Book Questions
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Earth Science 11 Chapter 28 Answers: 28.1 1. All are forms of

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Sun - UNT Physics

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... How do scientists know that the Earth actually orbits (revolves about) the sun? Have you ever thought about this? For thousands of years it was thought that the Earth was at the center of the universe and that everything moved around the Earth at different rates. Today, scientists know that the Eart ...
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Telescopes: More Than Meets the Eye

... Magnification is by far the best known of these three functions, but it really is the least important. Most objects in space are so far away that no matter how much you magnify them, they still look pretty much the same, the only difference is they get dimmer. What really allows you to see more dist ...
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MT 2 Answers Version D

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MT 2 Answers Version A

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MT 2 Answers Version C

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... for the Pre K-12 Science and Mathematics Campus. The Venus, Earth, Mars, Jupiter) is found at a proportionally accurate mathematical distance from the “Sun”. Each plaque colors for the Campus were identified as Purple (Representing the highest level of electromagnetic radiationincludes the name of t ...
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The Chandler wobble and Solar day

... This paper presents the results of the system approach to considering the problems of observation performance, methods for processing and interpreting the observation results, and the existing gravity dependence of astronomic instruments. The source of the dead-end situation [10] occurred in trying ...
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Astronomy Teaching that Focuses on Learning Subtitled

... 8. If two stars have the same spectral class, do they necessarily have the same temperature? The Stefan-Boltzmann Law tells us about how the luminosity of a star is related to its temperature and size. It reads as follows: L  Area  T 4 ...
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... The Sun’s Path Throughout the Year • The Sun’s Declination changes throughout the year due to the inclination of the Earth on its axis. • On Sep 20th and Mar 20th, the Sun’s Declination is 0°. • The Sun’s path follows the Celestial Equator. • These are called the autumnal and vernal equinoxes. • On ...
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Stars Chapter 21

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ANSWER KEY Evaluating Scientific Explanations: Why do we have
ANSWER KEY Evaluating Scientific Explanations: Why do we have

... How could one of the hemispheres be closer to the sun than the other one? The Earth is one big planet and the tilt doesn’t make any difference in the distance. (Note: This was not modeled in our experiment! The flashlight was so close to the book that when we tilted it, the top part of the book was ...
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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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