This Week in Space History: Isaac Newton’s Principia Published

On July 6, 1687, Sir Isaac Newton published his Philosophiæ Naturalis Principia Mathematica.

This Week in Space History – 1971: The Tragedy of Soyuz 11

On June 30, 1971, three Soviet cosmonauts died while reentering the Earth’s atmosphere after a successful docking and prolonged stay onboard the world’s first space station, Salyut 1.

Solar System Survey – Mercury (Part I)

Mercury is the smallest planet in our solar system at about 3,000 miles in diameter; it is also the closest planet to the Sun.

This Week in Space History 2009 – LCROSS Launched to the Moon

This week in 2009, on June 18, NASA launched the Lunar Crater Observation and Sensing Satellite (LCROSS) together with the Lunar Reconnaissance Orbiter (LRO) from Cape Canaveral SLC-41.

This Week in Space History: Isaac Newton’s Principia Published

This Week in Space History – 1971: The Tragedy of Soyuz 11

Solar System Survey – Mercury (Part I)

This Week in Space History 2009 – LCROSS Launched to the Moon