| Object/System | Mass | Radius | Density | td | ||
|---|---|---|---|---|---|---|
| solar masses | pc | cm | gm cm-3 | yrs | seconds | |
| Universe | 1023 | 5 x 109 | 1028 | 10-29 | 1.5 x 1010 | 5 x 1017 |
| Galaxy | 3 x 1011 | 104 | 3 x 1022 | 5 x 10-24 | 3 x 107 | 1015 |
| Star Cluster | 106 | 3 | 1019 | 3 x 10-19 | 105 | 3 x 1012 |
| Solar System | 1 | 2 x 10-4 | 6 x 1014 | 2 x 10-12 | 40 | 109 |
| Object/System | Mass | Radius | Density | td |
|---|---|---|---|---|
| solar masses | cm | gm cm-3 | seconds | |
| Sun | 1 | 7 x 1010 | 1.5 | 2 x 103 |
| White Dwarf | 1 | 4 x 108 | 1 x 107 | 1.3 |
| Neutron Star | 1 | 106 | 5 x 1014 | 10-4 |
|
Equations of State P = Krg |
||
| n | g = 1 + 1/n | Relevant to: |
|---|---|---|
| 0 | ¥ | incompressible fluids (H2O) |
| 0.5 | 3 | neutron stars |
| 1 | 2 | |
| 1.5 | 5/3 | protostars, normal stars, and white dwarfs |
| 2.5 | 7/5 | |
| 3 | 4/3 | massive white dwarfs |
| ¥ | 1 | isothermal gas |