Create an account
Big Bang Theory
States that all matter and energy started out concentrated in a small area and, after a gigantic explosion, matter began to organize into subtonic particles and atoms
The degree of ovalness of an ellipse, or how far an ellipse is from being a circle; computed using a formula
A closed curve around two fixed points called foci, in which the sum of the distances between any point of the curve and the foci is a constant
In an ellipse, either of two fixed points located so that the sum of their distances to any point on the ellipse is constant
The attractive force that exist between any two objects in the universe; proportional to the product of the masses of the objects and inversely proportional to the square of the distance between their centers; also called gravitational force
The concept that an object at rest will tend to remain at rest and that an object in motion with maintain the direction and speed of that motion unless an opposing force affects it
Luminosity (of a star)
Measures how bright the star will be in relation to the sun if all stars were the same distance from the observer
The combining of the nuclei of smaller elements to form the nuclei of larger elements with some of the mass being converted into energy
When earth and other celestial objects are moving apart and the electromagnetic waves are spread out
A planets movement around the sun in a path called an orbit; the movement of one body around another in a path called an orbit
The spinning of an object, such as a planet, moon, or star, on an imaginary axis- like a top
Any star or small group of orbiting stars and all the other objects that revolve around the star
Usually a large ball of gas held together by gravity that produces tremendous amounts of energy and shines
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together