Ibn-al-shatir's lunar model from which Copernicus is reported to have borrowed in composing his cosmological model. Credit: This work is in the public domain in the United States. New research has ...

New research suggests an unseen 'mirror world' of particles that interacts with our world only via gravity that might be the key to solving a major puzzle in cosmology today -- the Hubble constant ...

For decades, astronomers have relied on Einstein’s theory of relativity to explain the expansion of the universe, assuming that dark energy—a mysterious force making up 70% of the cosmos—remains ...

How do you measure dark matter, which by definition emits no light? Watch how it impacts things that you can see — specifically, how light from distant galaxies bends around it, as predicted by ...

Cosmology is already a complicated field of study, so switching up the variables is extra rough.