Daily Extra :
digital signals: Data that is converted to numerical form so that it can be stored and used in a computer.
Who Was Born Today?:
1928: James A. Lovell, born in Cleveland, Ohio, USN/astronaut, Gemini 7, 12, Apollo 8, Apollo 13
Who Died Today?:
Today in History:
1857: Frederick Laggenheim takes 1st photo of a solar eclipse
1961: Explorer 10 launched into elongated Earth orbit (177/181,000 km)
1988: NASA launches space vehicle S-206
1992: Russian manned space craft TM-14, lands
1996: Comet C/1996 B2 (Hyakutake) approaches within 0.1018 AUs of Earth
2000: IMAGE, USA Space Weather Satellite. IMAGE is the first weather satellite for space storms. It is designed to study the global response of the Earth's magnetosphere to changes in the solar wind.