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Strange Dark Galaxy Puzzles Astrophysicists

The surprising discovery of a massive, Milky Way–size galaxy that is made of 99.99 percent dark matter has astronomers dreaming up new ideas about how galaxies form.
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Welcome to the neighborhood: New dwarf galaxies discovered in orbit around the Milky Way

Academics / General Science : ScienceDaily: Science Society

Astronomers have discovered a 'treasure trove' of rare dwarf satellite galaxies orbiting our own Milky Way. The discoveries could hold the key to understanding dark matter, the mysterious substance which holds our galaxy together.

The Milky Way Galaxy "Is Embedded in a Massive Dark-Matter Halo Spinning Off Dark Satellites"

Academics / Astronomy : The Daily Galaxy

Around large galaxies, such as the Milky Way, dark matter sub-halos are large enough to host enough gas and dust to form small galaxies on their own, and some of these galactic companions, known as satellite galaxies, can be observe...

Andromeda's Dwarf-Galaxy Mashup --Astronomers Make a Surprising Discovery

Academics / Astronomy : The Daily Galaxy

Andromeda, the massive sister spiral galaxy to the Milky Way, is orbited by a swarm of small galaxies – astronomers so far have counted more than 20. They have names like Andromeda I, II, III, IV...etc. Researchers from the Dark...

Milky Way's spiral arms are the product of an intergalactic collision course; Models show dark matter packs a punch

Academics / General Science : ScienceDaily: Science Society

Astronomers have shown how the Milky Way galaxy's iconic spiral arms form, according to new research. A dwarf galaxy named Sagittarius loaded with dark matter has careened twice through our much larger home galaxy in the past two bi...

Violent Past as Prelude -- "Milky Way Collided With a Small Galaxy or Massive Dark Matter Structure 100 Million Years Ago"

Academics / Astronomy : The Daily Galaxy

"Our Milky Way had an encounter with a small galaxy or massive dark matter structure perhaps as recently as 100 million years ago," said Larry Widrow, professor at Queen’s University, part of a team of astronomers from Canada and th...


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