Much of the groundbreaking work in physics has
allowed the results to take the form of constants.
Certain values - like the speed of light for example
- are relatively unchanged and can safely integrate
themselves into new problems to be solved.The
list of constants given here are the ones used
mostly by Astronomers. A complete list of physical
constants is available from the
Physics Laboratory of the National Institute of
Standards and Technology.
In addition to constants, I have also integrated
some useful quantities as well.
| Name: |
Symbol: |
Value: |
| Astronomical Unit |
A.U. |
1.496 x 1011 meters |
| Atomic Mass Constant |
mu |
1.6605386x10-27 kg |
| Boltzmann Constant |
k |
1.3806505x10-23 J K-1 |
| Electron Volt |
eV |
1.60217653x10-19 J |
| Gravitational Constant |
G |
6.6742x10-11 m3 kg-1
s-2 |
| Gravity Constant Over h-bar |
G/ħ
c |
6.7087x10-39 (GeV/c2)-2 |
| Light Year |
ly |
9.4605x1015 m |
| Mass of Proton |
mp |
1.67262171x10-27 kg |
| Mass of Neutron |
mn |
1.67492728x10-27 kg |
| Mass of Electron |
me |
9.1093826x10-31 kg |
| Mass of Hydrogen Atom |
mH |
1.6735x10-27 kg |
| Parsec |
pc |
3.0857x1016 m |
| Planck Constant |
h |
6.6260693x10-34 J s |
| Planck Constant over 2π |
ħ |
1.05457168x10-34 J s |
| Rydberg Constant |
R∞ |
6.6x10-12 |
| Solar Mass |
 |
1.989x1030 kg |
| Solar Radius |
 |
6.9599x108 m |
| Solar Luminosity |
 |
3.90x1026 W |
| Speed of Light |
c |
299,792,458 m s-1 |
| Standard Atmosphere |
|
101,325 Pa |
| Stefan-Boltzmann Constant |
σ |
5.670400x10-8 W m-2
K-4 |
| Wien Displacement Law |
b |
2.8977685x10-3 n K |
| Year - Earth |
|
365.2564 days |
| Year - Earth |
|
3.156x107 sec |
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