Analysis of information sources in references of the Wikipedia article "Timeline of the far future" in Simple English language version.
[...] all the rings should collapse [...] in about 100 million years.
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: CS1 maint: unflagged free DOI (link)Given this assumption... the minimum possible mass of a neutron star is 0.189
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: CS1 maint: multiple names: authors list (link)The last time acidification on this scale occurred (about 65 mya) it took more than 2 million years for corals and other marine organisms to recover; some scientists today believe, optimistically, that it could take tens of thousands of years for the ocean to regain the chemistry it had in preindustrial times.
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(help)Given this assumption... the minimum possible mass of a neutron star is 0.189
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: CS1 maint: multiple names: authors list (link)[Pioneer's speed is] about 12 km/s... [the plate etching] should survive recognizable at least to a distance ≈10 parsecs, and most probably to 100 parsecs.
[NASA's David Morrison] explained that the Andromeda-Milky Way collision would just be two great big fuzzy balls of stars and mostly empty space passing through each other harmlessly over the course of millions of years.
[Pioneer's speed is] about 12 km/s... [the plate etching] should survive recognizable at least to a distance ≈10 parsecs, and most probably to 100 parsecs.