Daily Extra :
Astronomy & Space Word of The Day
cosmic ray: An extremely energetic charged particle.
Today in History:
1858: Max Karl Ernst Ludwig Planck born in Kiel, Schleswig-Holstein, Germany.
1962: Ranger 4 - USA Lunar Hard Lander launched. First US lunar impact of the Moon.
Apollo 16 - USA Manned Lunar Lander (April 16-27, 1972) Crew: John W. Young, Charles M. Duke, Jr., Thomas K. Mattingly II. Young and Duke landed on April 21, 1972, at the Descartes crater located at latitude 9°00' N and longitude 15°31' E. They deployed instruments, drove the lunar rover, and collected 94.7 kilograms of samples during a 71-hour surface stay.