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tkdguy

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2000 year old hunk of butter pulled from bog in Ireland

 

An ancient hunk of butter the size of a large watermelon has been recovered from a bog in Ireland. The bog butter, made from cow's milk, is estimated to be more than 2,000 years old. Ancient butter has been found in bogs many times before, either in hunks or containers of some kind, and researchers believe bogs may have been used as a means of preservation.
 
(Comments about dorm refrigerators are suppressed.)
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LIGO has announced a second black hole merger event. This one was in December, and the black holes were smaller, 14 and 8 solar masses.

I didn't think a black hole could BE that light.

 

Lucius Alexander

 

The palindromedary notes that 1) Eight solar masses is not exactly "light" and in this case is probably pretty dark, and 2) Lucius Alexander's extensive ignorance about astronomy is, well, astronomical.

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You can have black holes of any mass (above some really tiny limit).

 

I don't think we know the lower limit for making one via supernovae, but I think that limit is between 2.5 and 4 solar masses, the upper limit for masses of neutron stars. The progenitor pre-supernova star has to be rather higher mass than that.

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