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10 stories from Planck Standard. Latest: September 13, 2026.
Nine years after proposing the test, a Birmingham–Perimeter team measured how rotation squashed the heavier object in GW241011. Rotating boson stars with quartic self-interactions cannot explain it.
Nagoya University physicists found that hidden matter around a black hole shifts the frequency and the decay rate of its gravitational-wave ringdown by different amounts — a mismatch detectors could look for.
A team aboard the China Space Station ran the first atom-interferometry test of Einstein's weak equivalence principle in permanent free fall, and matched the two isotopes' accelerations to five parts in 100 million.
Penn researchers used the Atacama Cosmology Telescope to watch galaxy clusters pull on each other at the largest scale ever measured — and squeezed the room left for modified-gravity alternatives to dark matter.
A rising, bird-like pattern in an exploding star's light gave away the birth of one of the universe's most magnetic objects — and forced Einstein's relativity into the story of a supernova for the first time.
Watching a distant supernova flicker four times in a quickening rhythm, astronomers caught the moment an ultra-magnetic neutron star switched on — and saw Einstein's relativity at work in an exploding star.
Theoretical study suggests massive stellar collapse might trigger birth of tiny cosmos driven by dark energy, forming exotic objects called gravastars.
University of Tennessee physicists detected Earth's gravitational pull on particles of light in a benchtop interferometer, probing the elusive seam between general relativity and quantum mechanics.
Revolutionary gravastar theory suggests massive stellar collapse triggers miniature universe creation, challenging conventional black hole formation.
The clearest black hole merger ever recorded — with a signal-to-noise ratio nearly three times higher than LIGO's first detection — verified multiple tones predicted by Einstein's general relativity.