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27 Topic Pages Found in Astronomy and starting with the letter S
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Open Sagan, Carl (1934 - 1996)
Sagan, Carl (1934 - 1996)

Place: United States of America Subject : biography, astronomy US astronomer and popularizer of astronomy whose main research was on planetary

Open Satellites

A SATELLITE IS an airborne autonomous platform that carries a set of sensors to capture information on the surface of the earth, including vegetation,

Open Saturn (Planet)
Saturn (Planet)

Sixth planet from the Sun, and the second-largest in the Solar System, encircled by bright and easily visible equatorial rings. Viewed through a

Scheiner, Christoph (1573 - 1650)

German astronomer who carried out one of the earliest studies of sunspots and made significant improvements to the helioscope and the telescope. In

Open Scorpio (Astrology)
Scorpio (Astrology)

the Scorpion, a constellation giving its name to, and formerly coinciding with, a sign of the zodiac (also Scor'pius ; astron ); the eighth sign of

Open Search for Extraterrestrial Intelligence
Search for Extraterrestrial Intelligence

Search for Extraterrestrial Intelligence (SETI) is a term most commonly used in connection with searches for artificial radio signals from

Open sextant

instrument for measuring the altitude of the sun or another celestial body; such measurements can then be used to determine the observer's

Seyfert, Carl Keenan (1911 - 1960)

US astronomer and astrophysicist who studied the spectra of stars and galaxies, and identified and classified the type of galaxy that now bears his

Open Solar energy
Solar energy

Solar energy refers to the energy that is created and radiated by Sol—the star at the center of the solar system—or, more significantly, the amount of

Open Solar System
Solar System

the sun and the surrounding planets, natural satellites , dwarf planets, asteroids, meteoroids, and comets that are bound by its gravity. The sun is