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UPSC 2012: Which of the following is/are cited by the scientists as evidence/evidences for the continued expansion of universe? 1. Detection of microwaves in space 2. Observation of redshift phenomenon in space 3. Movement of asteroids in space 4. Occurrence of supernova explosions in space
(a)1 and 2
(b)2 only
(c)1, 3 and 4
(d)None of the above can be cited as evidence
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Not attemptedCorrect Answer: (a) 1 and 2
Key empirical supports for an expanding universe are: (1) the cosmic microwave background radiation, the cooled remnant of the Big Bang, and (2) the systematic red-shift of light from distant galaxies indicating they are receding. Asteroid motions are local solar-system phenomena, and mere occurrence of supernovae does not by itself evidence expansion, so only 1 and 2 are accepted. ([rishiupsc.com](https://rishiupsc.com/2012-prelims-question-paper-with-answers/))
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Frequently Asked Questions
What is the correct answer to this UPSC 2012 Science & Technology question?▼
The correct answer is option (a): 1 and 2. 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 2012, GS Paper 1, as Question 19. It falls under Science & Technology > Space Technology & Astronomy.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
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.