7. How were gamma-ray bursts discovered? Select one: A. By the Hubble Space Tele

Question

7.

How were gamma-ray bursts discovered?

Select one:

A. By the Hubble Space Telescope in orbit around Earth

B. By gamma-ray telescopes at the South Pole

C. By weather balloons lofted high in the atmosphere to detect lightning strikes

D. By detectors left by the astronauts on the far side of the Moon

E. By satellites designed to look for signs of nuclear bomb tests in space

9.How much energy does a typical gamma-ray burster emit?

Select one:

A. As much as the Sun in 100 years

B. As much as the Sun in a month

C. As much as the Sun since the demise of the dinosaurs

D. As much as the Sun over its entire lifetime

Explanation / Answer

7) E. By satellites designed to look for signs of nuclear bomb tests in space

Gamma Ray Bursts were first discovered in the late 1960s by military satellites monitoring the Earth for secret nuclear weapons tests.

9) D. As much as the Sun over its entire lifetime

A typical gamma-ray burst releases as much energy in a few seconds as the Sun will in its entire 10 billion year lifetime

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