Cosmology
A map of 14 million galaxies and quasars deepens a dark energy mystery
The DESI experiment shocked cosmologists with a hint that dark energy varies over time. Now, with more data, the conclusions hold up.
Cosmology
More Stories in Cosmology
- Cosmology
Einstein’s gravity endures despite a dark energy puzzle
The DESI project previously reported that dark energy — long thought to be constant — changes over time. A new analysis reaffirms that claim.
- Cosmology
How did dark matter shape the universe? This physicist has ideas
Theoretical physicist Tracy Slatyer proposes new scenarios for dark matter and helped discover the Fermi bubbles.
- Particle Physics
A neutrino mass mismatch could shake cosmology’s foundations
Cosmological data suggest unexpected masses for neutrinos, including the possibility of zero or negative mass.
- Physics
How to spot tiny black holes that might pass through the solar system
Flybys of primordial black holes may occur once a decade. Tweaks to the orbits of planets and GPS satellites could give away their presence.
- Cosmology
In an epic cosmology clash, rival scientists begin to find common ground
Different measurements of the cosmic expansion rate disagree. The James Webb telescope could determine whether that disagreement is real.
- Cosmology
Strange observations of galaxies challenge ideas about dark matter
A new look at how light bends as it travels through the universe could point to an alternative theory of gravity.
- Cosmology
The universe may have a complex geometry — like a doughnut
Physicists haven’t yet ruled out the possibility that the universe has a complicated topology in which space loops back around on itself.
- Cosmology
The largest 3-D map of the universe reveals hints of dark energy’s secrets
A year of data from DESI, the Dark Energy Spectroscopic Instrument, suggests that, contrary to expectations, dark energy might vary over time.
- Space
Did the James Webb telescope ‘break the universe’? Maybe not
There’s no need for strange new physics to explain anomalously bright, massive galaxies seen by JWST, Hubble data suggest.
