cosmic microwave background

Astronomers have discovered that stars in the outer portions of galaxies tend to move much faster than expected…

Einstein’s theory of gravity may behave slightly differently across distances of billions of light-years, with gravity appearing about…

A proposed cosmology model argues that the universe may contain ordinary matter alone, without dark matter or dark…

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It’s been more than three centuries since Isaac Newton figured out that gravity pulls things together. You’d think,…

Karl Jansky tracked radio static with a rotating antenna. Image credit – Wikimedia Simple engineering tasks often lead…

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Gravity is so weird that it essentially forces cosmologists into subscribing to one of two equally radical conclusions:…

Gravity behaves predictably in your daily life. Drop a ball, and it falls. Planets loop around stars. On…

Since March, scientists have been keeping their eyes peeled as the Dark Energy Spectroscopy Instrument (DESI) started chipping…

An artist’s depiction of the halo of hot hydrogen gas surrounding the Milky Way galaxy (center) and two…

One major, unsolved problem in astronomy involves the Hubble constant, a number representing how quickly the universe expands.…

Researchers tested gravity across galaxy clusters separated by hundreds of millions of light-years and found it behaves almost exactly as Newton and Einstein predicted, strengthening the case for dark matter