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Science Project
Science Project

... For many thousands of years , humanity , with a few notable exceptions , did not recognize the existence of the Solar System . People believed the Earth to be stationary at the center of the universe and categorically different from the divine or ethereal objects that moved through the sky . Althoug ...
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... To this distant point, the Sun and Earth have taken nearly opposite paths. Even a billion or two years from now, the Sun will look basically the same on the outside as it does now — a little bigger and brighter, but still recognizable. The Sun’s internal structure, however, will have changed markedl ...
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Our Universe - E Natural Health Center

... The Flat Earth In 600 B.C., in the West, the Assyrian Empire had just fallen. At its height, it had extended from Egypt to Babylonia, for an extreme length of 1400 miles. It was soon to be replaced by the Persian Empire, which extended from Cyrenaica to Kashmir, for an extreme length of 3000 miles. ...
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... Introduction: As one of the fruitful results obtained by exoplanet survey projects, an Earth-size planet has already been discovered in the habitable zone. From another point of view, observed spectra of exoplanets give us a lot of information. If we detect the signal of vegetation on exoplanets, it ...
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How the Earth Moves Transcript

... for astronomical observations by the Italian scientist Galileo Galilei (1564-1642), providing the first new astronomical data for centuries. He observed that Venus displayed phases and changes in its apparent size that correlated with its angular distance from the Sun, confirming Copernicus predicti ...
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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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