Why Did Karl Jansky Believe the Source of Radio Static

question 295

Multiple Choice

Why did Karl Jansky believe the source of radio static he was detecting in 1932 was NOT from terrestrial sources?

• A) In 1932 there were no strong sources of radio waves on Earth.
• B) He could detect the signals coming through Earth as well as from the sky.
• C) The radio static was most intense when the Sun was high in the sky.
• D) The radio static was most intense when the center of our Galaxy was high in the sky.

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Definitions:

Hypertrophy

The increase in size of an organ or tissue through the enlargement of its cells.

Skeletal Muscles

Muscles attached to bones by tendons that are responsible for the movement of the skeleton and thus the body.

Muscle Fibers

The elongated cells that makeup skeletal muscles, responsible for contracting to produce movement.

Involuntary Control

The automatic regulation of body functions, such as heart rate and digestion, that are not consciously controlled by the brain.