Astronomers use powers-of-ten notation to express large numbers in compact form.
Examples:
|
10 |
= 101 |
|
|
|
|
100 |
= 102 |
315 |
=3.15x100 |
=3.1x102 |
|
1000 |
= 103 |
3150 |
=3.15x1000 |
=3.15x103 |
|
1000000 |
= 106 |
|
|
|
|
1000000000 |
= 109 |
|
|
Examples: small numbers
|
0.1 |
= 10-1 |
|
|
|
0.01 |
= 10-2 |
0.315 |
=3.15x0.1 |
=3.15x10-1 |
0.001 |
= 10-3 |
0.0315 |
=3.15x0.01 |
=3.15x10-2 |
0.000001 |
= 10-6 |
|
|
|
0.000000001 |
= 10-9 |
|
|
