It is estimated that observable space or universe is 25 billion light years in diameter and one light year distance means approximately ,, km. Space exploration has lead to the creation of many life changing technologies. TOMS and phase-out of harmful chemicals b. Space exploration has been around for a while however, it has become more of a reality than science fiction.
The space research field evolved as scientific investigation based on advancing rocket technology. Vikram Sarabhai. Introduction A.
Consequently, the world has almost become a global village. Inthe space shuttle Challenger became the first spaceship to retrieve and repair an ailing solar satellite in April,