Sunday, January 1, 2017

Sunday, December 25, 2016

Saturday, December 24, 2016

Friday, December 23, 2016

Monday, December 19, 2016

Sputnik 1


Sputnik 1 was the first artificial Earth satellite. The Soviet Union launched it into an elliptical low Earth orbit on 4 October 1957. It was a 58 cm (23 in) diameter polished metal sphere, with four external radio antennae to broadcast radio pulses. It was visible all around the Earth and its radio pulses were detectable.
First Satellite in Space

Thursday, December 15, 2016

Tuesday, December 13, 2016

Saturday, December 10, 2016