Universal Constants
Atomic Constants
Astrophysics Calculator
Relativity Effects Calculator
This calculator demonstrates the effects of time dilation and length contraction predicted by special relativity.
Dilated Time: s
Contracted Length: m
Astrophysics Facts
- Did You Know? There are more stars in the universe than grains of sand on all the beaches on Earth.
- Fun Fact: The surface temperature of the Sun is about 5,500 degrees Celsius (9,932 degrees Fahrenheit).
- Trivia: The largest known star, UY Scuti, is estimated to be over 1,700 times the size of the Sun.
- Astrophysics Quote: "We are made of star stuff." - Carl Sagan
Solar System Planets
| Name | Mass (kg) | Radius (m) | Semi-Major Axis (km) | Orbital Period (days) | Mean Density (g/cm³) | Surface Gravity (m/s²) | Escape Velocity (km/s) | Sidereal Rotation Period (hours) |
|---|
Astrophysical Scales
| Quantity | Symbol | Value |
|---|---|---|
| Astronomical unit | AU | 1.496 x 1011 m |
| Light-year | ly | 9.461 x 1015 m |
| Parsec | pc | 3.086 x 1016 m |
| Object | Quantity | Symbol | Value |
|---|---|---|---|
| Sun | Solar mass | M⊙ | 1.989 x 1030 kg |
| Solar luminosity | L⊙ | 3.839 x 1026 J/s | |
| Solar radius | R⊙ | 6.955 x 108 m | |
| Earth | Earth mass | M⊙ | 5.974 x 1024 kg |
| Earth radius | R⊙ | 6.378 x 106 m | |
| Jupiter | Jupiter mass | MJ | 1.899 x 1027 kg |
| Jupiter radius | RJ | 7.149 x 107 m |