A weak uniform microwave radiation which is detectable in nearly every direction of the sky. It is believed to be evidence of the Big Bang.
- ‘Because of its near-perfect isotropy on the sky, the cosmic microwave background provides some evidence in favour of the Cosmological Principle.’
- ‘By combining the galaxy map with the newest images of the cosmic microwave background, the relic radiation left over from the Big Bang, astronomers say they have also confirmed the existence of something even stranger.’
- ‘Black holes, the cosmic microwave background, pulsars, neutron stars, gravitational lenses, gravity waves - these are just a few of the phenomena that would make no sense without general relativity.’
- ‘In the past half century radio astronomers discovered remarkable things, including pulsars, quasars, molecules in space, and the cosmic microwave background, the first evidence in support of the big bang itself.’
- ‘The experimental detection of the cosmic microwave background was one of the great triumphs of the Big Bang theory.’
We take a look at several popular, though confusing, punctuation marks.