Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

S. Mercado-Astronomy


Astronomy The study of the universe
Big Bang Theory The beginning of the universe
Red Shift Moving away
Blue Shft Moving towards
Frequency The number of waves produced in a given amount of time
Wavelength The distance on any point on a wave to an identical point on the next wave
Absolute Brightness (Magnitude) How bright a star really is
Apparent Brightness (Magnitude) How bright a star appears to be from earth
Cosmic Microwave Background (CMB) Glow leftover from the Big Bang
Universe Space and all the matter and energy in it
Galaxy A huge system of stars
Electromagnetic Spectrum The full range of electromagnetic radiation
Astronomical Unit (AU) Distance from the earth to the sun
Light Year The distance light travels in one year
Cosmology Study of the universe
Solar System A system of objects that revolves around a star
Star Giant ball of hot gas
Stellar Spectra Continuous black body spectrum and photosphere
Planet A large body in a space that orbits a star but does not produce any light of its own
Solar Nebula A large cloud of gas and dust
Gas Giant A large planet; Composed mainly of gas
Nuclear Fusion The process of which hydrogen atoms join together in the suns core to form helium
Main Sequence Diagonal pattern of stars
HR Diagram A graph relating the temperature and brightness of a star
Red Giant A large, reddish star late in its life cycle
White Dwarf A small, hot, dim star that is the leftover center of an old star
Nova A star that explosively increases in brightness
Neutron Star A small sphere of neutrons left behind by a massive-star supernova
Pulsar A rapidly spinning neutron star that produces radio waves
Black Hole An object whose gravity is so strong that nothing, not even light, can escaoe
Convective Zone A location within the sun where the hot material rises and the cool material falls back inward; Movement of matter as a result of temperature differneces
Photosphere The visible surface of the sun
Chromosphere The middle layer of the sun's atmosphere
Corona The outer layer of the sun's atmosphere
Sunspot A dark area of gas on the sun's surface that is colder than surrounding gases
Prominence A loop of gases that protrudes from the sun's surface, linking parts of the sunspot regions
Solar Flare A sudden eruption of intense high-energy radiation from the sun's surface
Coronal Mass Ejection An event when hot coronal gas is suddenly ejected into space with speeds of hundreds kilometers per second
Created by: smercado28