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young universeSpace
•58% Informative
Astronomers aren't sure what it is, but they mostly agree that it's worth investigating.
The cosmic microwave background ( CMB ) was generated when our universe was only 380,000 years old .
The cold spot is strangely cold. It's about 70 microkelvins colder than average, compared with the average run-of-the-mill cold spot.
It's also big — about 5 degrees across, which is about 10 full moons lined up side by side.
When light from the CMB first enters a void, it gains a little energy as it transitions from a high-density to low-density environment.
This leads to an overall loss of energy of CMB light crossing the void.
Sutter: A giant void could potentially explain the cold spot, but there's not sure if there's actually a giant void in that direction.
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