Talk:Himiko (Lyman-alpha blob)

Physics Mid‑importance

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Astronomy: Astronomical objects Mid‑importance

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"It is 12.9 billion light years from Earth, and since light-year is the distance light travels in a year, about 6 trillion miles (10 trillion kilometers). An object 12.9 billion light-years away is seen as it existed 12.9 billion years ago, and the light is just now arriving." - it isn't. I forget the exact equation, but it took the light 12.9 billion light-years to reach us. Due to the expansion of space, it was a lot closer when the light was emitted - a few hundred million light-years - and is now some tens of billions of light-years away.

"Objects"

I sure wish you physicist-types would define what it is you consider an "object". I've run across a host of Wiki entries that say that X is the largest object yet discovered in the universe. Obviously, the term is somewhat subjective, as a grouping of like objects can be considered an object it itself.

-- Frunobulax (talk) 15:13, 14 July 2013 (UTC)[reply]