A newfound cosmic alignment of galaxies challenges fundamental ideas about the nature of our universe.
Astronomers have found clumps of dark matter 30,000 light-years wide in the space between galaxies in the distant universe.
Dust is usually the product of generations of star formation. So what is all this dust doing in the early universe, just a few hundred million years after the Big Bang?
Three distant galaxies imaged by the James Webb Space Telescope might actually be "dark stars" powered by dark matter annihilation, claims a team of astronomers.
Deep-sky objects may appear static throughout our lifetime but by carefully "blinking" archival and current images we can discern real changes in their appearance.
A cosmic lens magnified the light of an exploding star. Now, astronomers are using observations of that supernova to calculate the universe’s current rate of expansion.
Astronomers analyzed the gravitationally lensed image of a distant galaxy to test the nature of dark matter.
JWST's detection of early galaxies that are far more massive than astronomers had expected could mean we need to rewrite our understanding of the cosmos.
Images and spectra from the James Webb Space Telescope suggest that the first galaxies in the universe are too many or too bright compared to what astronomers expected.
Scientists have detected something unusual around a distant quasar — perhaps the first real evidence of a first-generation star.
Distant galaxies in Webb images suggest we need to rethink star and galaxy evolution in the early universe.
The Hubble Space Telescope has revealed a single star whose light has traveled for 12.9 billion years to Earth — the most distant star known.