Zettametre
A
zettametre
(
American spelling
:
zettameter
, symbol:
Zm
) is a
unit
of
length
equal to 10
21
metres
. Zettametres could be used for measuring
intergalactic
distances, but astronomers have been long accustomed to use
light-years
and
parsecs
instead.
1 Zm is equal to 105700
light-years
or 32408
parsecs
the diameter of
our galaxy
is about 1.0 Zm
distance to the
Large Magellanic Cloud
is 1.6 Zm
distance to the
Andromeda Galaxy
is 22.3 Zm
distance to the "
Black Eye Galaxy
" is 160 Zm
exametre
<<
zettametre
<<
yottametre
See also
1 E21 m
SI
SI prefix
Orders of magnitude
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