this post was submitted on 10 Mar 2025
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https://phys.org/news/2025-01-peculiar-icy-outer-milky-perplex.html

Peculiar icy objects in outer reaches of the Milky Way perplex astronomers
... both could be dense clouds of gas or a type of star that has not been seen before ...
... both objects appear to be approximately 10 times the size of the solar system, which the researchers describe as very small for a gas cloud ...
... the gas surrounding both objects is made up mostly of silicon dioxide, with a little carbon dioxide ...
https://arxiv.org/abs/2501.05008
(preprint)