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Gale In Context: Science is an engaging online resource that provides contextual information on hundreds of today’s most significant science topics. By integrating authoritative reference content with headlines and videos, learners see how scientific disciplines relate to real-world issues, from weather patterns to obesity. Users can explore millions of full-text articles from national and global publications, 200+ experiments and projects, and top reference content.
1) Astronomers
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Explores the work of astronomers, including information on their working conditions, their tools, and important scientific discoveries.
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Astronomers look up into the sky and yearn to understand the universe. They ask questions about the distant stars and galaxies and wonder what lies beyond them. This title aims to create meaningful connections between the scientific concepts readers learn in the classroom and how they are applied in the real world by astronomers searching for answers.
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Explore the theoretical limit of the smallest possible orbit for a planet, taking into consideration tidal stresses and other destructive processes. Then focus on Professor Winn's search for such objects, which found probable lava worlds-planets heated to rock-melting temperatures by their extreme closeness to their host stars.
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Begin your search for planets that may harbor life by studying the conditions that make Earth habitable, including its distance from the Sun, surface temperature, atmosphere, and oceans. Then examine strategies for finding earthlike planets and the progress to date.
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Learn about the exciting mission of exoplanetary science-the study of planets orbiting stars beyond the Sun. Review the eight planets in our solar system, which provide a baseline for understanding the more than 1,000 worlds recently discovered in our region of the Milky Way galaxy.
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Dig deeper into the treasure trove of data from the Kepler mission, which discovered hundreds of compact multiplanet systems, with planets much more closely packed than in our solar system. Explore the dynamics of these groupings, which have planets interacting strongly through mutual gravitation.
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Survey the history of spectroscopy to understand how a telescope and a diffraction grating can disclose the composition of a star and its planet. Then learn how transits and occultations are ideal for analyzing planetary atmospheres, paving the way for the search for signatures of life.
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Pinpoint the location of the nearest exoplanetary systems to Earth. First, get the big picture on the layout of our Milky Way galaxy, its size, and the Sun's position. Also learn why the Kepler spacecraft focused on exoplanets much more distant than those targeted by the Doppler technique.
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See how data from the Kepler spacecraft confirms a scenario straight out of the movie Star Wars: a planet with two suns. Investigate the tricky orbital mechanics of these systems. A double star also complicates the heating and cooling cycle on a planet. However, the view is spectacular!
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A tiny percentage of exoplanets can be detected transiting-or passing in front of-their host stars. Combined with Doppler shifts, transits provide information about a planet's size, mass, density, and likely composition. Learn how ambitious amateur astronomers can use this detection technique in their own backyards.
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Chart the history of exoplanet hunting-from a famous false signal in the 1960s, through ambiguous discoveries in the 1980s, to the big breakthrough in the 1990s, when dozens of exoplanets turned up. Astronomers were stunned to find planets unlike anything in the solar system.
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Investigate 51 Pegasi b, the first planet detected around a Sun-like star, which shocked astronomers by being roughly the size of Jupiter but in an orbit much closer to its star than Mercury is to the Sun. Probe the strange characteristics of these "hot Jupiters," which have turned up around many stars.
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In billions of years, the Sun will expand into a red giant, possibly engulfing Earth. Learn how planet-finding techniques give astronomers insight into the processes inside giant stars. Then study the planets around these behemoths for clues about Earth's ultimate fate.
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Get a lesson in Einstein's general theory of relativity to understand an effect called gravitational microlensing, which allows astronomers to deduce a planet's existence without recording any light from the planet or its host star. This technique reveals exoplanets that would otherwise go undetected.