Cosmology
Debate over the universe’s expansion rate may unravel physics. Is it a crisis?
Measurements of the Hubble constant don’t line up. Scientists debate what that means.
Cosmology
More Stories in Cosmology
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AstronomyIn a first, magnetic fields have been spotted between two galaxy clusters
The discovery of magnetic fields in the gaseous filament between two galaxy clusters suggests that some large cosmic structures are magnetized.
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CosmologyHidden ancient neutrinos may shape the patterns of galaxies
The gravitational pull of subatomic particles born in the universe’s first second seem to influence how galaxies cluster into rings.
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CosmologyA cosmic flare called the ‘Cow’ may reveal a new way that stars die
A burst of light from far away may have been an odd type of exploding star or a white dwarf being eaten by a black hole.
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CosmologyA second repeating fast radio burst has been tracked to a distant galaxy
Astronomers have spotted a second repeating fast radio burst, and it looks a lot like the first.
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CosmologyVoyager 2 spacecraft enters interstellar space
Voyager 2 just became the second probe ever to enter interstellar space, and the first with a working plasma instrument.
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AstronomyAstronomers find far-flung wind from a black hole in the universe’s first light
The detection of black hole winds far from their host galaxy could reveal details of how galaxies and black holes grow up together.
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AstronomyAstronomers have measured all the starlight ever emitted
Astronomers used distant blazars to tally up all the stray photons roaming through space.
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Planetary ScienceHints of Oort clouds around other stars may lurk in the universe’s first light
Sifting through the universe’s early light could reveal planetary graveyards orbiting other stars.
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CosmologyThe universe’s continued existence implies extra dimensions are tiny
The strictest limits yet on the size of extra dimensions come from the fact that black holes haven't destroyed the universe.