12. How often does a solar or lumar ectipse occur? A) B) 6 months C) I year I mo

Question

12. How often does a solar or lumar ectipse occur? A) B) 6 months C) I year I month E) 3 weeks D) bias moon 13. The visible surface of the sun is called the: A) heliosphere B) corona C) chromosphere D) photosphere E) stratosphere 14. How many weeks are there from a I quarter to a waning gibbous moon? A) 15 B) 2 C)3 D) 1 E) 2.5 15. Ifa star has an apparent brightness magnitude of +9 at a distance of 100 parsec, what would be its absolate brightness magnitude at the standard distance of 10 parsec? A) 9 B) 10 C) 6 D) 14 E) 4 When auclear fusion ends in a star of mass greater than 3 solar masses, it first becomes what before finaly becoming a black hole? A) pulsar 16. B) white dwarf C) supernova D) nebulaeE) suns th: A) lunar B) solar C) umbra

Explanation / Answer

When full moon shown or blue moon then it is a possibility of an eclipse .

Hence option (D) is correct .

13-

The visible surface of the sun is called the photosphere.

Hence option (C) is correct .

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