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DK Space: Jupiter

WHAT ARE THE GALILEAN MOONS? FIND OUT MOREThe biggest planet, Jupiter, is 11 times wider than Earth. It is made mainly of hydrogen and helium. Its rapid spin makes the clouds in its atmosphere form…

DK Science: Mars

THE MOONS OF MARSFIND OUT MOREThe fourth planet from the Sun, Mars is one of Earth’s closest neighbours. Mars has a slight atmosphere (mainly carbon dioxide), and ice caps at the poles.…

Classical Mythology: Eeek! Sea Monsters!

Eeek! Sea Monsters!Classical MythologyTake the Long Way Home: OdysseusGoing Home So Soon? Not Bloody LikelyThe Poseidon AdventuresEeek! Sea Monsters!Hi, Honey, I'm Home! The More Things Change ...…

William WHIPPLE, Congress, NH (1730-1785)

WHIPPLE, William, a Delegate from New Hampshire; born in Kittery, York County, Maine, January 14, 1730; became a sailor and engaged in the slave trade; freed his slaves and engaged in…

John Holmes BURLEIGH, Congress, ME (1822-1877)

BURLEIGH, John Holmes, (son of William Burleigh), a Representative from Maine; born in South Berwick, York County, Maine, October 9, 1822; attended the local academy; became a sailor when…

DK Space: Uranus

WHO DISCOVERED URANUS? WHAT ARE URANUS’S MOONS LIKE? FIND OUT MORETilted at 98°, Uranus seems to be spinning on its side. As it moves in its orbit, first one pole and then the other points straight…

Some Facts about Eclipses

Source: U.S. Naval Observatory and NASA/Goddard Space Flight Center Anaxagoras, in the 5th century B.C., is credited as the first to figure out the true cause of a lunar eclipse, but his…

NASA's 50th Anniversary

Celebrating NASA's birthday with fantastic slideshows featuring astronauts, spacecrafts, moons, planets, and more by Mark Hughes A wake up call came to the American people in 1957, when the…

cycle

(Encyclopedia) cycle, in astronomy, period of time required for the recurrence of some celestial event. The length of a cycle may be measured relative to the sun or to the fixed stars (see sidereal…