MW has captured satellites from neighbors

[notFritzArgelander]

https://phys.org/news/2019-10-milky-kid ... ghbor.html

[Michael131313]

Thanks n_NF. Interesting, but I did not know that there could be a galaxy without stars. " the LMC and galaxies similar to it host numerous tiny dwarf galaxies, many of which contain no stars at all—only dark matter" Is this really a galaxy?

[notFritzArgelander]

Thanks n_NF. Interesting, but I did not know that there could be a galaxy without stars. " the LMC and galaxies similar to it host numerous tiny dwarf galaxies, many of which contain no stars at all—only dark matter" Is this really a galaxy?

It's an overstatement. There are dark matter galaxies with very few stars and very little. But without a few stars or a little gas we wouldn't know there was dark matter present unless there was gravitational lensing.

A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter.

https://en.wikipedia.org/wiki/Galaxy

There are galaxies we see that are free of gas (as far as we can tell) so, sure why not? What they are more precisely talking about are dark galaxies like Dragonfly 44 which has almost no stars.

https://en.wikipedia.org/wiki/Dark_galaxy

[helicon]

Very interesting and I have learned a lot. Thanks notFritz.