Portal:Space exploration/Did you know

...that Doppler spectroscopy was used to discover the first extrasolar planet in 1995 and has since been used to identify more than a hundred exoplanet candidates?

...that the Satellite Instructional Television Experiment, launched in 1975, was one of the first demonstrations that showed the potential of satellite technology as an effective mass communication media?

...that STS-116 was the last STS mission scheduled for launch from Pad 39B, after which the pad will be refitted for upcoming Ares I launches?

...that NASA engineer Harvey Allen's "Blunt Body Theory" made possible the design of heat shields that protected the Mercury, Gemini and Apollo astronauts?

...that the Pioneer anomaly shows a yet unexplained acceleration acting on the Pioneer 10 and Pioneer 11 spacecraft?

...that since November 2, 2000 there were always at least two humans in orbit?