Supernova from the Universe’s Childhood
A massive galaxy cluster acts as a giant lens. Its gravity warps the fabric of space, and the light of distant objects, bending around this curvature, is amplified and split into multiple images.
Red Eyes: Cosmic Lens Reveals a Pair of Black Holes
Thanks to gravitational lens — an effect predicted by Fritz Zwicky, where a galaxy cluster acts like a magnifying glass — the James Webb Space Telescope spotted two red dots in a galaxy 800 million years after the Big Bang.
A Galaxy Cluster at the Dawn of the Universe
In the first moments after the Big Bang, the universe was nearly uniform, like smooth dough. But within a billion years, in some places the dough began to rise faster: clumps of hundreds of galaxies emerged, which astronomers call protoclusters. These are the seeds of future giant clusters, the most massive bound structures in the universe.
Prodigy Galaxy: A Barred Spiral at the Dawn of Time
The early Universe is often imagined as a nursery: most galaxies there are amorphous blobs, rowdy and irregular, choking on gas and bursts of star formation.
Dim Architects of Dawn: How Invisible Galaxies Lit Up the Universe
Within a field of view the size of a grain of sand held up to the eye, hundreds of galaxies lie hidden, smeared into arcs by the massive cluster Abell S1063.