| Physical Constants | |
|---|---|
| Name | Value |
| speed of light (c) | 2.9979 × 108 m/s |
| gravitational constant (G) | 6.674 × 10−11 m3/(kg s2) |
| Planck’s constant (h) | 6.626 × 10−34 J-s |
| mass of a hydrogen atom (MH) | 1.673 × 10−27 kg |
| mass of an electron (Me) | 9.109 × 10−31 kg |
| Rydberg constant () | 1.0974 × 107 m−1 |
| Stefan-Boltzmann constant (σ) | 5.670 × 10−8 J/(s·m2 deg4)[1] |
| Wien’s law constant (λmaxT) | 2.898 × 10−3 m K |
| electron volt (energy) (eV) | 1.602 × 10−19 J |
| energy equivalent of 1 ton TNT | 4.2 × 109 J |
A table titled “Physical constants” with two columns and ten rows. The first row reads “speed of light (c)” and “2.9979 times 10 to the 8 m/s”. The second row reads “gravitational constant (G)” and ‘6.674 times 10 to the negative 11 m3/(kg s squared)”. The third row reads “Planck’s constant (h)” and “6.626 times 10 to the negative 34 J-s”. The fourth row reads “mass of a hydrogen atom (M sub H)” and “1.673 times 10 to the negative 27 kg”. The fifth row reads “mass of an electron (M sub e)” and “9.109 times 10 to the negative 31 kg”. The sixth row reads “Rydberg constant (R sub infinity)” and “1.0974 times 10 to the seven 7 m to the negative 1”. The seventh row reads “Stefan-Boltzmann constant (sigma)” and “5.670 times 10 to the negative 8 J/(s·m squared deg to the fourth)”. The eighth row reads “Wien’s law constant (lambda max T)” and “2.898 times 10 to the negative 3 m deg”. The ninth row reads “electron volt (energy) (eV)” and “1.602 times 10 to the negative 19 J”. The tenth row reads “energy equivalent of 1 ton TNT” and “4.2 times 10 to the 9 J”.
| Astronomical Constants | |
|---|---|
| Name | Value |
| astronomical unit (AU) | 1.496 × 1011 m |
| Light-year (ly) | 9.461 × 1015 m |
| parsec (pc) | 3.086 × 1016 m = 3.262 light-years |
| sidereal year (y) | 3.156 × 107 s |
| mass of Earth (MEarth) | 5.974 × 1024 kg |
| equatorial radius of Earth (REarth) | 6.378 × 106 m |
| obliquity of ecliptic | 23° 26’ |
| surface gravity of Earth (g) | 9.807 m/s2 |
| escape velocity of Earth (vEarth) | 1.119 × 104 m/s |
| mass of Sun (MSun) | 1.989 × 1030 kg |
| equatorial radius of Sun (RSun) | 6.960 × 108 m |
| luminosity of Sun (LSun) | 3.85 × 1026 W |
| solar constant (flux of energy received at Earth) (S) | 1.368 × 103 W/m2 |
| Hubble constant (H0) | approximately 20 km/s per million light-years, or approximately 70 km/s per megaparsec |
A table titled “Physical constants” with two columns and fourteen rows. The first row reads “astronomical unit (AU)” and “1.496 times 10 to the 11 m”. The second row reads “Light-year (ly)” and “9.461 times 10 to the 15 m”. The third row reads “parsec (pc)” and “3.086 times 10 to the 16 m = 3.262 light-years”. The fourth row reads “sidereal year (y)” and “3.156 times 10 to the 7 s”. The fifth row reads “mass of Earth (M sub Earth)” and “5.974 times 10 to the 24 kg”. The sixth row reads “equatorial radius of Earth (R sub Earth)” and “6.378 times 10 to the 6 m”. The seventh row reads “obliquity of ecliptic” and “23.4 degrees 26 minutes”. The eighth row reads “surface gravity of Earth (g)” and “9.807 m/s squared”. The ninth row reads “escape velocity of Earth (v sub Earth)” and “1.119 times 10 to the 4 m/s”. The tenth row reads “mass of Sun (M sub Sun)” and “1.989 times 10 to the 30 kg”. The eleventh row reads “equatorial radius of Sun (R sub Sun)” and “6.960 times 10 to the 8 m”. The twelfth row reads “luminosity of Sun (L sub Sun)” and “3.85 times 10 to the 26 W”. The thirteenth row reads “solar constant (flux of energy received at Earth) (S)” and “1.368 times 10 to the 3 W/m squared”. The fourteenth row reads “Hubble constant (H sub 0)” and “approximately 20 km/s per million light-years, or approximately 70 km/s per megaparsec”.