Source. |
And here is the brief chronology of space exploration that Judy prepared as background for our discussion of this article:
“Firsts in Space”― a timeline for this article
Oct 4, 1957 - Sputnik (USSR) launched
Jan 1, 1958 – Explorer 1 – the first US satellite - launched
Jan 1, 1959 – Luna 1 (USSR) launched, then orbits the sun
Sept. 12, 1959 – Luna 2 (USSR) launched, then impacts the moon
April 12, 1961 – Yuri Gagarin (USSR) orbits earth
May 5, 1961 – Alan Shepard (US) sent into (sub-orbital) space
Feb. 20, 1962 – John Glenn (US) orbits earth
Group 401 will discuss this article next week; group 501 (evening) the following week. In the meantime, here is the video we showed as a preview in our 401 class last Wednesday.
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