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How Big Are Things?
Home     Welcome
small Real
world

big     solar system between galaxy
nano
micro
meter
kilo
Mega
Giga
Tera
Peta
Exa
  Zettameter's Room - looking at a sheet of graph paper
  Zm = 1021 m
look at the entire room
 
galaxy21
 20
19
local stars18
 17
16
between15
 14
13
E's orbit12
 11
10
sun9
 8
7
texas6
 5
4
hood3
 2
1
you0
 -1
-2
salt grain-3
 -4
-5
bacteria-6
 -7
-8
atom-9
1021 m    1 Zm
1022 m    10 Zm
1023 m    100 Zm

our galaxy

Mega light-years (M ly)
0
1
2
3
4
5
6
7
8
9
10

0

1

2

3
Mega parsecs (Mpc)

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