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Rosh Hashanah is Jewish New Year

On Sunday night, Oct. 2, 2016, Jews will begin celebrating one of their most important religious holidays, Rosh Hashanah. It remembers the creation of the world. In Hebrew, Rosh Hashanah means the "…

DK Space: Saturn

WHAT ARE SATURN’S RINGS? WHAT IS TITAN LIKE? FIND OUT MOREThis giant planet has a magnificent system of shining rings circling its equator. Saturn is the second-largest planet in the Solar System.…

Space Exploration

Encyclopedia: Space Mars Video and Educational Activities The Universe Constellations and Stars The Solar System Space Exploration NASA Turns 50 Space Shuttle Timeline New Planetary System…

Aristarchus of Samos

(Encyclopedia) Aristarchus of SamosAristarchus of Samosărˌĭstärˈkəs, [key]Aristarchus of Samosărˌĭstärˈkəs, sāˈmŏs [key], fl. c.310 b.c.–c.230 b.c., Greek astronomer and mathematician of the…

center of mass

(Encyclopedia) center of mass, the point at which all the mass of a body may be considered to be concentrated in analyzing its motion. The center of mass of a sphere of uniform density coincides with…

Date of Easter

The Question: Why does Easter occur at different times each year? The Answer: Easter, for Western churches, is calculated as the first Sunday…

Our Solar System (in order from the Sun)

by Mark Hughes Our solar system consists of a bright yellow star, eight planets, nearly 150 moons, and thousands of smaller objects like asteroids and comets. If you wanted to see all eight planets…

DK Science: Space

UNIVERSEMATTER IN THE UNIVERSEOUR PLACE IN THE UNIVERSECROWDED CITYOUR PLANETTHE SOLAR SYSTEMOUR GALAXYTHE EXPANDING UNIVERSEWHERE SPACE BEGINSUNIVERSAL FORCESFIND OUT MOREBIG BANGTIMELINE OF THE…

Endymion

(Encyclopedia) EndymionEndymionĕndĭmˈēən [key], in Greek mythology, young shepherd, loved by Selene (the moon). In one version of his legend, he asked Zeus for immortality and perpetual youth. Zeus…