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Galileo [9] [10] discovered the Galilean moons. These satellites were the first celestial objects that were confirmed to orbit an object other than the Sun or Earth. Galileo saw Io and Europa as a single point of light on 7 January 1610; they were seen as separate bodies the following night. [11] Callisto: Jupiter IV o: 8 January 1610 p: 13 ...
Georg Brandt (26 June 1694 – 29 April 1768) [1] [2] was a Swedish chemist and mineralogist who discovered cobalt c. 1735. He was the first person to discover a metal unknown in ancient times. [3] [4] He is also known for exposing fraudulent alchemists operating during his lifetime. [5]
First planet discovered in a circumbinary orbit PSR B1620-26 b: PSR B1620-26: 1993 Orbits a pulsar and a white dwarf. Discovery confirmed in 2003. First planet discovered in globular cluster PSR B1620-26 b: PSR B1620-26: 1993 Located in Messier 4. First planet discovered in a multiple main-sequence star system 55 Cancri b: 55 Cancri: 1996
Planet Discovery method Mass (M J) Radius (R J) Density (g/cm 3) Orbital period ()Semimajor axis ()Orbital eccentricity Year of confirmation Ref. Earth (for reference): 0.003 15
First human-piloted space flight (Alan Shepard). First human-crewed suborbital flight. USA Freedom 7: 19 May 1961: First planetary flyby (within 100,000 km of Venus – no data returned). USSR Venera 1: 6 August 1961: First crewed space flight lasting over twenty four hours by Gherman Titov, who is also the first to suffer from space sickness ...
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4 October 1957 First Earth orbiter [1] [2] Sputnik 2: 3 November 1957 Earth orbiter, first animal in orbit, a dog named Laika [2] [3] [4] Explorer 1: 1 February 1958 Earth orbiter; discovered Van Allen radiation belts [5] Vanguard 1: 17 March 1958 Earth orbiter; oldest spacecraft still in Earth orbit [6] Luna 1: 2 January 1959
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