The Units switch above does not change the units of your calculation! It only specifies the units of the constants buttons for future entries!
| NAME | SYMBOL | NUMBER | CGS UNITS | |
|---|---|---|---|---|
| Velocity of light | c | 2.998 x 1010 | cm s-1 | |
| Planck constant | h | 6.626 x 10-27 | erg s | |
| Gravitational constant | G | 6.67 x 10-8 | cm3 g-1 s-2 | |
| Electron charge | e | 4.803 x 10-10 | esu | |
| Mass of electron | m_e | 9.1096 x 10-28 | g | |
| Mass of proton | m_p | 1.6724 x 10-24 | g | |
| Mass of neutron | m_n | 1.6747 x 10-24 | g | |
| Mass of hydrogen | m_H | 1.6733 x 10-24 | g | |
| Atomic mass unit | amu | 1.661 x 10-24 | g | |
| Avagadro's number | N_A | 6.0222 x 1023 | ||
| Boltzmann constant | k | 1.38 x 10-16 | erg K-1 | |
| Electron volt | ev | 1.602 x 10-12 | erg | |
| Rad'n density constant | a | 7.5646 x 10-15 | erg cm-3 K-4 | |
| Stefan-Boltzmann const | sigma | 5.67 x 10-5 | erg cm-2 K-4 s-1 | |
| Fine structure constant | \alpha | 7.29735308 x 10-3 | ||
| Rydberg constant | R | 2.17992 x 10-11 | erg | |
| Year | yr | 3.156 x 107 | s | |
| Astronomical unit | AU | 1.496 x 1013 | cm | |
| Parsec | pc | 3.086 x 1018 | cm | |
| Light year | ly | 9.463 x 1017 | cm | |
| Solar mass | M_sun | 1.99 x 1033 | g | |
| Solar radius | R_sun | 6.96 x 1010 | cm | |
| Solar Luminosity | L_sun | 3.9 x 1033 | erg s-1 | |
| Solar Temperature | T_sun | 5780 | K |
In the calculator above, the Period has been converted to seconds and the Semi-Major Axis has been changed to cm.
| Name | Mass (g) | Radius (cm) | Period (yr) | Semi-Major (AU) | Eccentricity |
|---|---|---|---|---|---|
| Mercury | 3.303 x 1026 | 2.439 x 108 | 2.4085 x 10-1 | 3.87096 x 10-1 | 0.205622 |
| Venus | 4.87 x 1027 | 6.05 x 108 | 6.1521 x 10-1 | 7.23342 x 10-1 | 0.006783 |
| Earth | 5.976 x 1027 | 6.378 x 108 | 1.00004 x 100 | 9.99987 x 10-1 | 0.016684 |
| Mars | 6.418 x 1026 | 3.397 x 108 | 1.88089 x 100 | 1.523705 x 100 | 0.093404 |
| Jupiter | 1.899 x 1030 | 7.14 x 109 | 1.18622 x 101 | 5.204529 x 100 | 0.047826 |
| Saturn | 5.686 x 1029 | 6 x 109 | 2.94577 x 101 | 9.575133 x 100 | 0.052754 |
| Uranus | 8.66 x 1028 | 2.615 x 109 | 8.40139 x 101 | 1.930375 x 101 | 0.050363 |
| Neptune | 1.03 x 1029 | 2.43 x 109 | 1.64793 x 102 | 3.020652 x 101 | 0.004014 |
| Pluto | 1 x 1025 | 1.2 x 108 | 2.47686 x 102 | 3.991136 x 101 | 0.256695 |
Note: This calculator was written and tested on a Unix computer. If it looks bad to you, try making your window wider. The calculator looks especially bad on Macs, unfortunately...
Most of the JavaScript code for this calculator came (with permission) from the Scientific Calculator by Rolf Howarth. (rolf@insect.demon.co.uk)
The code for the comment field at the top of the page came from Bruce Busby (bbusby@umich.edu)