NASA and the Astronauts

NASA and the Astronauts — page 5
THE EXPLORER I SATELLITE Flexible antennas Micrometeorite ultrasonic microphone Nose cone temperature probe Cosmic ray measuring instruments Micrometeorite erosion gauges The next few launch attempts including the Explorer 2 satellite were not successful Finally in March 1958 the Vanguard 1 satellite successfully reached outer space Later that month Explorer 3 also reached space But the Soviet Union was not far behind Sputnik 3 launched two months later