APOD: Star Size Comparisons (2013 Jun 06)

Comments and questions about the APOD on the main view screen.
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Chris Peterson
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Re: APOD: Star Size Comparisons (2013 Jun 06)

Post by Chris Peterson » Mon Jun 10, 2013 3:07 pm

neufer wrote:But, in the case of the entire Universe the term "center" has no meaning.
That's not true at all. It has a physical meaning both in terms of the 3D spatial universe, and the 4D spacetime universe.
Whereas, the center of yannick's universe does have a meaning.
Of course, there are also other interpretations- the center of the observable universe, the center of expansion, and of course, the figurative center.
Chris

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JohnD
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Re: APOD: Star Size Comparisons (2013 Jun 06)

Post by JohnD » Mon Jun 10, 2013 9:05 pm

NTX

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Beyond
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Re: APOD: Star Size Comparisons (2013 Jun 06)

Post by Beyond » Mon Jun 10, 2013 9:34 pm

JohnD wrote:NTX
:?:
To find the Truth, you must go Beyond.

odysseus

Re: APOD: Star Size Comparisons (2013 Jun 06)

Post by odysseus » Wed Jun 12, 2013 6:20 pm

neufer wrote:
felixfelixby wrote:diametr, km 2 800 000 000
circle lenth, formula diam.*3,14159
distance, km 8 796 452 000
hours in a day 24
velocity 900
distane per day, km 21 600
days in a year 365
distane per year, km 7 884 000
trip duration, years 1 116
That's only if there are no flight delays.
it should be implied that the "years" are earth years.
Let's name the plane orbiting the largest star APOD. A single orbit of the largest sun would only take *1* APOD-year... :D