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UPSC 1998: One Astronomical Unit is the average distance between
(a)Earth and the Sun
(b)Earth and the Moon
(c)Jupiter and the Sun
(d)Pluto and the Sun
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Not attemptedCorrect Answer: (a) Earth and the Sun
An Astronomical Unit (AU) is formally defined as the mean Earth–Sun distance (≈ 149.6 million km). It is not based on Earth-Moon or any planet–Sun distance other than Earth’s. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Astronomical_unit?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 1998 Science & Technology question?▼
The correct answer is option (a): Earth and the Sun. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Space Technology & Astronomy question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 1998, GS Paper 1, as Question 125. It falls under Science & Technology > Space Technology & Astronomy.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Space Technology & Astronomy?▼
UPSC has asked 69 questions from Space Technology & Astronomy (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.