Create an account
The galaxy that contains our solar system; visible as a broad band of stars across the night sky
A form of energy that can be transmitted through a vacuum. Its spectrum contains radio waves, infrared waves, visible light waves, ultra-violet waves, x-rays, and gamma rays
An electronically neutral, subatomic, nearly massless, particle emitted by the fusion reaction within the sun that travels at nearly the speed of light
The horizontal distance between crests of waves, such as those of the electromagnetic spectrum
An instrument used to identify the elements in an incandesent substance by separating and measuring the component wavelenghts
a device made of thousands of closely spaced slits through which light is passed in order to produce a spectrum
a fourth state of matter that forms at extremely high temperatures and is distinct from solid or liquid or gas. It is present in stars and fusion reactors. Its particles are partially or completely ionized.
One of innumerable bumps in the sun's photosphere thought to result from convection currents bringing up hot plasma from beneath the sun's surface
a relatively small, cooler darker area appearing periodically on the sun's photosphere believed to be associated with irregularities in the sun's magnetic field
Violent eruption on the surface of the sun resulting in intense emissions of ultra-violet radiation, x-rays, and solar matter Larger solar flares (coronal mass ejections) create geomagnetic storms on earth.
High-speed particles from the sun's corona mostly protons and electrons traveling outward in all directions into intersteller space
An immense disturbance in the corona of the sun that may appear as a loop, a feathery structure or an irregular mass rising from and falling back into the sun
The central region of the interior of a celestial object where thermonuclear fusion takes place
The middle zone of the model of the sun's interior where thermal energy moves outward from the core by radiation
In the model of the sun's interior, it is the outermost region, composed of extremely hot plasmas, where heat transfer from the radiative zone to the surface occurs by convection
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