APOD: Star Size Comparisons (2013 Jun 06)

[Chris Peterson]

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.

[JohnD]

NTX

[Beyond]

NTX

[odysseus]

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...