Save
Busy. Please wait.
Log in with Clever
or

show password
Forgot Password?

Don't have an account?  Sign up 
Sign up using Clever
or

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.
Your email address is only used to allow you to reset your password. See 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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
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

GS - Astronomy

Ch 22 - Origin of Modern Astronomy

TermDefinition
astronomy Study of the universe
geocentric A model of the universe in which Earth is at the center of the revolving planets and stars.
orbit The curved path of a celestial object or spacecraft around a star
heliocentric A model of the solar system in which Earth and the other planets revolve around the sun
Aristotle (384-322 BC) philospher
Eratosthenes (276-194) An astronomer that is credited with being the first to establish the size of the Earth
retrograde motion The apparent motion of the planets when they appear to move backwards (westward) with respect to the stars from the direction that they move ordinarily.
ellipse A elongated circle
astronomical unit The average distance between Earth and the sun
Aristarchus (310?-250? BCE) Greek scientist who first stated that the Earth revolved around the Sun
Claudius Ptolemy ancient Greek astronomer that is known for his theory of an earth-centered universe
Nicolas Copernicus (1473-1543) concluded that the sun is the center of our solar system. Heliocentric Theory or Copernicus Theory. He wrote "On the Revolution of Heavenly Spheres"
Tycho Brahe (1546-1601) Established himself as Europe's foremost astronomer of his day; detailed observations of new star of 1572.
Johannes Kepler Assistant to Brahe; used Brahe's data to prove that the earth moved in an elliptical
Galileo Galilei 1564-1642
Sir Isaac Newton Defined the laws of motion and universal gravitation and used them to predict the motion of stars and planets around the sun.
rotation CIRCULAR MOVEMENT AROUND AN AXIS
revolution Earth's yearlong elliptical orbit around the sun
precession A slow motion of Earth's axis that traces out a cone over a period of 26
perihelion Nearest point to the sun in the orbit of a heavenly body
aphelion The place in the Earth's orbit where Earth is farthest away from the sun.
perigee Nearest point to the earth in the orbit of a heavenly body
apogee farthest point from the earth in the orbit of a heavenly body
phases of the moon the progression of changes in the moon's appearance during the month;
solar eclipse Occurs when the Moon passes directly between the Sun and Earth and casts a shadow over part of Earth
lunar eclipse Occurs whenever the Moon passes through the Earth's shadow
crater A large round pit caused by the impact of a meteoroid.
ray splash marks that radiate outwards from a crater
mare A large dark, relatively smooth area on the moon's surface
rille a long channel similar to valleys or trenches
lunar regolith a thin. gray layer on the surface of the moon
Created by: droesener
Popular Earth Science sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards