60 years ago the space era began… It began with the first artificial satellite launched into the orbit around the Earth at 19:28:34 UT1 on October 4, 1957. The satellite was launched by the Soviet Union and was called “Sputnik-1” (in Russian it means a satellite). Below one can see a photo of the first satellite before launch taken from Soviet Union archive. Mass of the satellite was 83,6 kg, and its diameter was 0,58m. The height of the perigee was 228 km, and the height of apogee was 947 km, so the period of revolution was 96,2 min. The first satellite made 1440 revolutions around the Earth (92 days) and was heard at the frequencies 20MHz and 40MHz, one can listen below a recording of its signal made in Germany those days. It contributed to the science by the density data of the upper atmosphere layers using the drag force.
The second satellite was launched also by the Soviet Union on November 3, 1957.
The first Turkish satellite Turksat 1B was launched from Guiana Space Centre in Kourou, French Guiana at 23:05 UTC on August 10, 1994. It was a communication satellite as part of a project to form an instant network with two geosynchronous satellites that is supervised by the companies Türksat A.Ş. in Turkey and Aérospatiale of France.
Prepared by Anatoliy IVANTSOV