NASA mathematician Katherine Johnson, whose calculations helped get the first Americans to space and back safely, died today at the age of 101. Among her many accomplishments, she completed the trajectory analysis for Alan Shepard’s 1961 suborbital flight, which was the first time the US sent a human into space.

Click this link for more news

Date of Input: 25/02/2020 | Updated: 25/02/2020 | noorizzati