For decades, dark matter has been treated as the unseen framework around which galaxies take shape. Even the smallest ...

A faint dwarf galaxy drifting 45 million light-years from Earth may have joined one of astronomy’s strangest clubs. It belongs to a tiny set of galaxies that seem to exist without dark matter.

Astronomers have long argued that dark matter is the invisible scaffolding that holds galaxies together. Without its immense gravitational pull, the rotational spins of galaxies would force them to ...

DF9's lack of dark matter strongly suggests that DF2, DF4, and DF9 formed together in the same violent event, such as a high-speed collision between galaxies, Keim said. In this scenario, the ...

NASA calls dark matter the glue that holds the universe together—but the evidence is mounting that, at least in some galaxies ...

Dark matter-free galaxy NGC 1052-DF9 was confirmed by Yale astronomers on June 16, 2026 — the third of its kind ever found ...

Astronomers have followed a faint, cosmic trail of gas to a third galaxy that has no dark matter. Two of those other galaxies, DF2 and DF4, were previously shown to lack dark matter — an invisible, ...