SUNSET: 
Life and Death in Nearby Galaxies
New images of nearby galaxies and their surroundings reveal details in galactic formation and evolution — and puzzles that remain to be solved.
New Image Reveals Possible Origins of “Odd Radio Circles”
This faint ring of radio emission might signal a momentous event in galactic evolution. Then again, it might be something else entirely.
"Dead Ringer" for the Milky Way Found in Early Universe
A cosmic magnifying glass has revealed a Milky Way-like galaxy in the early universe that doesn’t conform to cosmologists’ expectations.
The Black Hole Files with Camille Carlisle
Odd Jets Might Signal Dual Black Holes
Off-kilter, curved, and otherwise unusual beams of plasma from galaxies’ cores might track the dueling dances of two supermassive black holes.
Milky Way May Be Made with Swapped Gas
High-powered simulations suggest that half of the material in the Milky Way could come from other galaxies.
The Making of a “Frankenstein” Galaxy
Astronomers take a second look at UGC 1382 — previously considered a typical elliptical galaxy — and reassess everything they know about its size, age, and formation.
Super Spiral Galaxies
Astronomers have identified 53 “super spirals” — spiral galaxies that are huge and incredibly luminous — as part of a project exploring archived observations.
Seeing Shadows of Ancient Galaxies
A new technique lets astronomers measure nearly invisible clouds of hydrogen gas from across the universe.
Ancient Galaxies Seen Dying Inside-Out
Astronomers have found massive galaxies 3 billion years after the Big Bang that are dying from the inside out.
Question Reopened: How do Galaxies Grow?
Evidence from observations sheds doubt on cosmic cannibalism as a source for galaxy growth, suggesting that instead galaxies grow by pulling in gas from the intergalactic medium.