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150
Ptolemy invented the concentric system
Around 150 A.D. Ptolemy, an Alexandrian astronomer, invented the concentric system to explain the motions of the planets around the earth.
His work was believed and accepted until 1543. -
Jan 1, 1543
mercury is a planet theory
Nicolaus Copernicus proposed the theory that mercury was orbiting the sun and therefore a planet. This was in 1543. -
fisrt planet found (besides Earth)
uranusSir William Herschel discovered Uranus on March 13th, 1781. He was one of the most famous or notable astronomers of the 18th century. -
Johann Gottfried Galle found neptune
On September 23rd, 1846 Johann Gottfried Galle found neptune. -
pluto found
Clyde Tombaugh found pluto in 1930 and said it was a planet.
sadly pluto's planetship expired and we were told we only have 8 planets in our solar system; not 9.
helpful website -
NASA Formed 29 Jul 1958
nasaThe National Aeronautics and Space Administration or NASA was formed by the United States during the space race for more aeronautics and aerospace research. It controls all missions and launches to space. -
Luna 9
luna 9Luna 9 was the first space craft to have a soft luna landing. It was sent by the Russians. The spacecraft landed on oceanus procellarum. Luna 9 took pictures of the surface of the moon but these pictures werent immediately released. -
Luna 10
luna 10Luna 10 was the first spacecraft to orbit the moon. It finished its first orbit in 3 hours. The design of the spacecraft was similar to that of Lunar 9. After the spacecraft went into orbit, the satellite separted but stayed close by. -
Soyuz I
Soyuz 1 was a manned spacecraft holding Vladimir Komarov. It was the first of the Soyuz series. On its return back to Earth, technical problems caused a crash and the death of Vladimir. It was the first fatal space flight. -
Apollo 8
Apollo 8 was the first manned spacecraft to orbit the moon. It was a three man crew containing Frank Borman, James Lovell, and William Anders. The mission took three days and took 10 orbits in 20 hours. On Christmas Eve the crew read the first 10 verses of Genisis while broadcasting the view on television. -
Apollo 11
apollo 11Apollo 11 was the first flight that took men to the moon and was a project of the United States. This was a great achievement because the US had reached the moon before the Soviets. -
magellan
The Magellan mission scientific objectives were to study land forms and tectonics, impact processes, erosion, deposition, chemical processes, and model the interior of Venus. -
mars pathfinder
Mars Pathfinder launched December 2, 1996 and arrived on the surface of Mars on July 4, 1997. The mission was an engineering demonstration of key technologies and concepts for use in future missions to Mars; it also delivered science instruments -
mars odyssey
The 2001 Mars Odyssey is an orbiter carrying science experiments designed to make global observations of Mars to improve our understanding of the planet's climate and geologic history, including the search for water and evidence of life-sustaining environments. -
pluto demoted
sadly pluto no longer is a planet.
