A stellar explosion was observed on Earth last Wednesday. Astronomers
report this event occurred 7.5 billion light years away -- halfway
across the universe.
http://www.foxnews.com/story/0,2933,340449,00.html
Near enough for astronomical math, a light year is 10 Pm. That puts this
stellar explosion 75 Ym away (75 yottameters). Thus, the universe is
roughly 150 Ym across. No need here for a larger prefix. Stating the
mass of the universe might be a different story, though.
While I'm at it, reckon an astronomical unit (mean Earth-Sun distance)
as 150 Gm.
Jim
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James R. Frysinger
632 Stony Point Mountain Road
Doyle, TN 38559-3030
(H) 931.657.3107
(C) 931.212.0267
