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Our light year conversion tool allows you to convert light years into different-length units. Figure out how far light will travel in a given light year.
Why is the night sky dark, only dotted with shiny stars? Olber's paradox is a titillating problem with a clear and satisfying solution.
With our redshift calculator, you can determine the magnitude of redshift – an interesting phenomenon in astrophysics.
The luminosity calculator finds a star's luminosity, absolute magnitude, and apparent magnitude.
Calculate the gravitational acceleration at the event horizon of a black hole of a given mass using the Schwarzschild radius calculator.
Use the parallax calculator to determine the distance between the earth and the stars.
The Black Hole Collision Calculator lets you see the effects of a black hole collision, as well as revealing some of the mysteries of black holes, come on in and enjoy!
Come on into the Hubble law distance calculator where you can find the answers for the questions like what is the Hubble's Law and what is the value of the Hubble constant.
Use the radiation pressure calculator to find the pressure that arises from electromagnetic radiation.
Use the black hole temperature calculator to learn the black body temperature of a black hole from just its mass.
Where is everybody? Learn how to calculate the probability of another civilization existing somewhere in our Galaxy with Omni's Drake equation calculator.
Create your own Universe with this Universe Expansion calculator