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interference from television static
pigeon poop on the telescope
torn wiring
Correct!
The radio telescope was able to pick up the mysterious radiation because it could detect longer wavelengths.
Definition: the microwave energy observed from all directions in the sky, interpreted as the afterglow from the Big Bang
Formation: 380,000 years after the Big Bang
Temperature: 2.7 degrees above absolute zero
Discovered: In 1965, by Arno Penzias and Robert Wilson of New Jersey's Bell Labs
In 1965, two astronomers detected unusual background "noise" while testing a horn-shaped radio telescope. They thought it was caused by:
The cosmic microwave background shows the universe as it appeared:
at the moment of the Big Bang
a few hundred thousand years after the Big Bang
when the solar system's planets formed
Correct!
The Big Bang itself emitted no light. The universe then was so dense that light could not escape; it was opaque. After expanding for about 380,000 years, the universe became transparent, meaning that light could slip free. This first light is the cosmic microwave background.
We can see light from the cosmic microwave background with our naked eye.
Fact
OR
Fiction
?
Fiction
We cannot see the cosmic microwave background. This light reaches us as microwaves, which have longer wavelengths than visible light.