Caution! The site can't guarantee, that text has age permission. The site is not recommended, if you are less than 18 years old.
The site shows example sentences for English words. How the word or phrase could be used in a sentence?
" ... 2.) A low-energy, omnidirectional, leftover glow of radiation. If the Universe were hotter, denser, and more uniform in the past, eventually you’d reach a point where it was so hot and dense that even neutral atoms couldn’t form. The instant an electron bound to an atomic nucleus, a sufficiently energetic photon would come along and reionize that atom, preventing neutral atoms from stably forming. Only when the Universe expanded and cooled sufficiently would these photons lose enough energy that the Universe could become neutral, “releasing” that radiation which would stretch its wavelength as the Universe expanded. ... "
" ... Finally, beyond a certain distance, the Universe hasn't formed enough stars to reionize space and make it 100% transparent. ... "