What did Penzias and Wilson discover? What did Penzias and Wilson accidentally discover?

What did Penzias and Wilson discover? What did Penzias and Wilson accidentally discover? – Arno Penzias and Robert Woodrow Wilson accidentally discovered the cosmic microwave background radiation in 1964 while working at Bell Labs.

While their initial goal was to study radio emissions from our Milky Way galaxy, they stumbled upon a faint, isotropic hum that permeated the universe, ultimately leading to a groundbreaking revelation about the cosmos.

They were working with a very sensitive radio telescope at Bell Labs in New Jersey, looking for something completely different – neutral hydrogen – when they happened to stumble upon a faint glow of microwave radiation that permeates the universe.

In order to detect such a faint signal, they needed to make sure they knew the source of every part of the signal their telescope was receiving.

As such, they had to account for a number of peculiar things, such as their theoretical models suggested that a young, hot, dense universe would produce such radiation. They were months away from making their own measurements, but Penzias and Wilson got there first.

Their discovery of the Cosmic Microwave Background (CMB), the radiation left over from the birth of the universe, provided the strongest possible evidence that the universe began with a Big Bang.

This discovery earned them the Nobel Prize in Physics in 1978