Question

18 कृत्रिम उपग्रह किसे कहते हैं? इसकी कक्षीय चाल एवं कुल ऊर्जा (गतिज एवं स्थितिज)
के लिए सूत्र स्थापित कीजिए।
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Answer 1

In the context of spaceflight, a satellite is an object that has been intentionally placed into orbit. These objects are called artificial satellites to distinguish them from natural satellites such as Earth's Moon. On 4 October 1957 the Soviet Union launched the world's first artificial satellite, Sputnik 1.