2007 – International Heliophysical Year begins.
2002 – First image from Mars Odyssey visible light camera
THEMIS is from a Martian region known as Acheron Fossae and begins to map the surface of Mars using its thermal emission imaging system.
1924 – Edwin Hubble writes to Harlow Shapely “You will be interested to hear that I have found a Cephid variable in the Andromeda Nebula.”
Birthdays
1473 – Nicolas Copernicus is said to be the founder
of modern astronomy. In 1530, he completed and gave to the world his great work De Revolutionibus, which
asserted that the earth rotated on its axis once daily
and traveled around the sun once yearly.
1932 – Joseph P. Kerwin, American captain, physician, and astronaut served as the science pilot for the Skylab 2 mission from May 25, 1973, to June 22, 1973. He was the first physician to be selected for astronaut training and the first doctor from the United States to enter space.