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To understand why we have seasons, we need to look at the relations ... The sun's rays are pretty close to parallel to each other when they reach the Earth, ...
http://daphne.palomar.edu/jthorngren/tutorial.htm
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seasons
astronomy
earth
science
sun
space
tutorial
study
weather
physics
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nasa
earth
images
science
space
satellite
photos
photography
astronomy
maps
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SkyandTelescope.com's Free E-newsletters. Weekly Bulletin ... Sky & Telescope, Night Sky, and SkyandTelescope.com are registered trademarks of New ...
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astronomy
science
space
magazine
telescope
news
sky
stars
reference
magazines
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Galaxy Zoo is an online, large-scale astronomical survey that asks volunteers to help classify galaxies.
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astronomy
science
space
research
galaxy
community
classification
collaboration
web2.0
web
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Turn your computer into a virtual telescope. Microsoft's WorldWide Telescope brings together imagery from the best ground and space-based telescopes for a seamless exploration of the universe. Also offers guided tours of the sky by astronomers and educators.
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astronomy
science
telescope
space
microsoft
education
software
research
visualization
web2.0
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A browser-based virtual planetarium of stars and planets customizable by location (latitude and longitude) and time of day.
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astronomy
science
space
planetarium
stars
constellations
flash
cool
reference
visualization
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Managed by the California Institute of Technology, is NASA's lead center for robotic exploration of the solar system.
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space
science
nasa
astronomy
technology
jpl
news
photography
images
physics
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KidsAstronomy.com is a powerful astronomy websited designed to introduce children to the facinating ... KidsAstronomy.com, part of the KidsKnowIt Network, is the ...
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astronomy
science
space
kids
education
solar_system
planets
solarsystem
games
interactive
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Complete astonomy textbook for first-year college courses.
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astronomy
science
education
physics
astrophysics
reference
space
teaching
cosmology
stars
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No information avaiable
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science
astronomy
blog
space
blogs
physics
news
technology
skepticism
education
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astronomy
science
space
variables
stars
research
reference
education
physics
astro
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