Advertisement Upgrade to remove ads

Don't freak anymore!!

between corona and photospher in sun


gases circulate here, rising the sun's energy

convective zone

a closed curve where the distance is always the same


the system composed of the sun and other bodies that travel around it

solar system

for seeing in space

astronomical telescope

eliptical motion of a body in space orbiting


eliptical path a body takes as it travels around another body


the spinning of a body on its axis


a large cloud of dust and gas in interstellar space


a telescope that uses curved mirrors to gather and focus light

reflecting telescope

imaginary circle created by extending earth's equator into space

celestial equator

all the wavelengths of electromagnetic radiation

electromagnetic spectrum

a measure of how north or south an object is from the celestial equator


a system for organizing time


a year in which an extra day is added

leap year

the time required for the earth to rotate once on its axis


a measure of how far east from the sun point on the first day of spring

right ascension

the study of all physical objects beyond earth


the time required for the earth to orbit the sun once


roughly the amount of time for the moon to orbit the earth once


a section of the sky that contains a recognizable star pattern


a unit of length equal to the distance that light travels through space in one year


the angle between an object in the sky and the horizon


the apparent path the sun takes across the celestial sphere


an instrument used to closer view the sky and beyond


a telescope used to see things on the ground

Terrestrial telescope

A telescope that uses a set of lenses to gather and focus light

refracting telescope

average distance between the earth and sun

astronomical unit

atom-packed part of the sun that can take millions of years to get through

radiative zone

an area of the photosphere of sun, cooler than surrounding areas showing a dark spot

sun spot

two nuclei that form together to make a larger source of energy

nuclear fusion

surface of sun; thick see-able gasses


the thin outermost layer of the earth, the uppermost part of the lithosphere


outer layer of sun- can equal 12 times the diameter


the layer of earth between crust and core


the tiny building blocks of planets, dust particles that grew


time it takes for a body to make an orbit

period of revolution

the central, spherical part of the earth, below mantle


the nebula that formed into the solar system

solar nebula

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 above and try again


Reload the page to try again!


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

NEW! Voice Recording