(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…
(Encyclopedia) Juan FernándezJuan Fernándezhwän fārnänˈdās [key], group of small islands, S Pacific, c.400 mi (640 km) W of Valparaiso, Chile. They belong to Chile and are constitutionally a special…
(Encyclopedia) Wouk, HermanWouk, Hermanwōk [key], 1915–2019, American writer, b. New York City. In The Caine Mutiny (1951; Pulitzer Prize), he made the protagonist-antagonist Captain Queeg a popular…
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…
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…
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…
(Encyclopedia) HeleneHelenehəlēnˈ, hĕlˈənə [key], in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn XII (or S12), Helene is an irregularly shaped (…
