12. The farthest object normally visible to the naked eye is M33, a galaxy of 40

Question

12.

The farthest object normally visible to the naked eye is M33, a galaxy of 40 billion stars, 3 million light years away. GRB 080319B was 7.5 BILLION light years away, yet appeared brighter in visible light than M33!

How many times farther away than M33 was GRB 080319B?

Select one:

a. 40

b. 2.5

c. 250,000

e. 2,500

17.

In case of a nearby GRB, a lethal dose of which subatomic particle could cause the death of up to half the living creatures on Earth?

Select one:

b. positrons (anti-matter)

c. muons (heavy electrons)

d. neutrinos

e. protons

18.

Which of the following species would be most likely to survive if a nearby (~7000 light years) GRB happened with its beam toward Earth?

Select one:

A. humans

B. phytoplankton

D. a deep-sea anglerfish

Explanation / Answer

12. e. 2500
17. d. neutrinos
18. D. a deep-sea anglerfish

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