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Search for Extraterrestrial Intelligence (SETI)
An exploratory science that searches for evidence of life in the universe.
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Seasons
Four natural divisions in weather and daylight throughout the year resulting from Earth’s yearly revolution around the Sun and the tilt of Earth’s axis. The seasons are Spring, Summer, Fall, and Winter.
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Serpens, the Serpent
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SIM-Planetquest Mission
A NASA space telescope being developed to search for Earth-sized planets orbiting in the habitable zones of nearby stars other than the Sun.
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Sirius, the Dog Star
The brightest star in the northern night sky, Sirius is actually a binary star system 8.7 light-years away in the constellation Canis Major.
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Size of the Universe
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Skylab
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Social Studies
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solar eclipse august 2018 information viewing tips resources
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Solar System
The system of our Sun and its planets, including moons, asteroids, and comets.
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