Daily Extra :
Astronomy & Space Word of The Day
viscous relaxation: The process whereby topographic features become subdued over time due to the flow of the surrounding geologic material.
Today in History:
1867: Wilbur Wright born in Millville, Indiana.
1970: Apollo 13 - USA Lunar Flyby (April 11-17, 1970) Crew: James A. Lovell, Jr., Fred W. Haise, Jr., John L. Swigert, Jr. The Apollo 13 mission became one of survival for the astronauts on board. During the translunar coast an explosion destroyed both power and propulsion systems of the Command Service Module. The Lunar Module was used as a lifeboat for the astronauts.
Apollo 16 - USA Manned Lunar Lander (April 16-27, 1972) launched. 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.