With reference to 'Astrosat', the astronomical observatory launched by India, which of the following statements is/are correct? 1. Other than USA and Russia, India is the only country to have launched a similar observatory into space. 2. Astrosat is a 2000 kg satellite placed in an orbit at 1650 km above the surface of the Earth. Select the correct answer using the code given below.
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A hard Science & Technology multiple-choice question from UPSC Prelims 2016. Attempt it above, then check the correct answer and detailed explanation below.
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Correct answer: D. Neither 1 nor 2
Both are wrong — India is not the only country besides the USA and Russia to have launched a space observatory, and Astrosat weighs about 1500 kg and orbits at roughly 650 km (not 2000 kg at 1650 km). So neither is correct — option (d).
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