This Day In Astro History

Spirit Rover looks back at her lander

Sputnik 1

Galileo's wooden tube covered with paper, equipped with an objective bi-convex lens and a plano-convex eyepiece. It magnifies 14 times.

January 4

2004 - Mars Exploration Rover Spirit lands in Gusev Crater on Mars. (wiki link)

1959 - Luna 1 (Soviet Union) passed within 5995 km of the Moon's surface after 34 hours of flight. It went into orbit around the Sun, between the orbits of Earth and Mars.

1958 - Sputnik 1, launched on October 4, 1957 and the first artificial satellite to orbit Earth,  reenters the Earth's atmosphere and disintegrates.

1643 - Sir Isaac Newton born in Woolsthorpe, Lincolnshire, England.

1610 - January 4 - 15 Possibly the most important days in the history of astronomy. Galileo Galilei, Italy, points his telescope to the sky and observes craters and mountains on the Moon, moving spots on the Sun, four moons revolving around Jupiter , the phases of Venus, and the stars of the Milky Way.
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It is my conclusion that human evolution and the motions of matter in space are intrinsically linked. The observation and understanding of the complexity of biological history on Earth cannot be complete without the tandem observation and understanding of a dynamic greater cosmos. - SpaceGene