5 ms·
« On 25 August 2016, astronomers reported that Dragonfly 44, an ultra diffuse galaxy (UDG) with the mass of the Milky Way galaxy, but with nearly no discernable
by The_rationalist 8y ago
« On 25 August 2016, astronomers reported that Dragonfly 44, an ultra diffuse galaxy (UDG) with the mass of the Milky Way galaxy, but with nearly no discernable stars or galactic structure, may be made almost entirely of dark matter.[6][7][8] »
Meta-source: https://en.m.wikipedia.org/wiki/Dark_galaxy https://en.m.wikipedia.org/wiki/Dark_galaxy
- The_rationalist 8y agoIsn't this a proof of the invisibility of dark matter ?
- lev99 8y agoIt's an observation that fits our theoretical models when dark matter is assumed. It's indirect proof. The indirect proof is so overwhelming strong that any rational person will concluded with reasonable certainty that dark matter is real. Directly detecting a dark matter particle will give us more data than "dark matter is real".