x 10 0
x 10 1
da
Symbol
x 10 3
x 10 6
x 10 9
x 10
x 1015
x 1018
h
k
M
G
T
P
E
(mega)
(giga)
(tera)
(peta)
(exa)
1,000,000
1,000,000,000
1,000,000,000,000
1,000,000,000,000,000
(million)
(billion)
(trillion)
(deca) (hecto) (kilo)
Prefix
Decimal 1
10
Short
Scale
100
1,000
(ten) (hundred) (thousand)
x 10 -18
12
x 10 2
x 10 -15
x 10 -12
x 10 -9
x 10 -6
a
f
p
n
Prefix
(atto)
(femto)
(pico)
(nano)
(micro)
m
0.000000000000001
0.000000000001
0.000000001
0.000001
Short
Scale (quintillionth)
(quadrillionth)
(trillionth)
(billionth)
(millionth)
1.23 pc
4.00 ly
2.46 x 10 3 AU
3.80 x 1016 m
Distance to center
of Milky Way
2,150 pc
7.00 x 103 ly
4.30 x 10 8 AU
6.64 x 10 19 m
8,000 pc
2.60 x 103 ly
1.60 x 10 9 AU
2.47 x 10 20 m
(quintillion)
c
x 10 -1
x 10 0
d
(milli) (centi) (deci)
Decimal 0.000000000000000001
Distance to Eagle
Nebula
(quadrillion)
x 10 -3 x 10 -2
Symbol
Distance to Alpha
Centauri (Closest
star...Actually a binary
system)
1,000,000,000,000,000,000
0.001
0.01
0.1
1
(thousandth) (hundredth) (tenth)
Distance to
Andromeda Galaxy
778,000 pc
2.54 x 10 6 ly
1.56 x 1011AU
2.40 x 10 22 m
Distance to 3C 273
(1st QSO
discovered)
749,000,000 pc
2.44 x 10 9 ly
1.50 x 1014AU
2.31 x 10 25 m