This effect, known as gravitational redshift, is critical for maintaining GPS on Earth. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

There are several different kinds of redshift that we encounter in the universe. Those three are ‘gravitational’, ‘doppler‘ and ‘cosmological‘. Before looking at two examples, it is best to have a ...

For over a century, physicists have grappled with one of the most profound questions in science: How do the rules of quantum mechanics, which govern the smallest particles, fit with the laws of ...

Legendary physicist Albert Einstein was a thinker ahead of his time. Born March 14, 1879, Einstein entered a world where the dwarf planet Pluto had yet to be discovered, and the idea of spaceflight ...

The supermassive black hole at the center of the Milky Way is the most extreme astrophysical object located within a million light-years of Earth. With an estimated four million solar masses, it's the ...

Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and Fundamental Forces from Imperial College London.View full profile Alfredo has a PhD in Astrophysics and a Master's in Quantum ...

Albert Einstein wins again. His general theory of relativity has proved accurate in predicting how light travels from some of the most distant galaxy clusters in the universe, according to new ...

There are few scientific concepts that are as famous as Albert Einstein's theory of general relativity, but even the iconic theory isn't set in stone. Einstein's theory of general relativity states ...

Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and Fundamental Forces from Imperial College London.View full profile Alfredo has a PhD in Astrophysics and a Master's in Quantum ...

THE chief criticism 1 of the gravitational interpretation of the red-shift in the spectra of quasars consists of three items: high electron density, differential gravitational red-shift and the small ...