HOW DO SATELLITES STAY UP IN SPACE? SATELLITE ORBITSFIND OUT MOREA spacecraft that travels in a steady path, or orbit, around Earth is called a satellite. Satellites receive and send on…
Most people think……Christopher Columbus discovered America. In fact, the Vikings, led by Leif Ericson, were the first Europeans to land on the coast of North America in the year 1000. Christopher…
(Encyclopedia)
CE5
Aircraft motions and control surfaces: Yaw, or motion to the left or right, is controlled by the rudder. Pitch, or climbing or dropping, is controlled by the elevators, which…
(Encyclopedia) Bologna, Giovanni, or GiambolognaGiambolognajōvänˈnē bōlōˈnyä, jämˌbōlōˈnyä [key], 1524–1608, Flemish sculptor, whose real name was Jean Bologne or Boulogne. Though born in Douai,…
(Encyclopedia) Wilkins, Sir George Hubert, 1888–1958, British explorer, b. Australia. He made a number of trips to Antarctica and to the Arctic. Valuable experience gained when he accompanied…
(Encyclopedia) Hermes, in Greek religion and mythology, son of Zeus and Maia. His functions were many, but he was primarily the messenger of the gods, particularly of Zeus, and conductor of souls to…
Migration Some animals live their whole lives in one location. Others migrate, or move from place to place — sometimes over huge distances. Animals migrate for several reasons: to find food or…
(Encyclopedia) Schirra, Wally, (Walter Marty Schirra, Jr.), 1923–2007, the only American astronaut to fly in all of NASA's first three manned spaceflight programs, b. Hackensack, N.J., grad. U.S.…
(Encyclopedia) altimeteraltimeterăltĭmˈĭtər, ălˈtĭmēˌtər [key], device for measuring altitude. The most common type is an aneroid barometer calibrated to show the drop in atmospheric pressure in…
