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
edit
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

ASTRONOMY FLASH CARD

S

QuestionAnswer
Astronomy the science that deals with the material universe beyond the earth's atmosphere.
Geocentric having or representing the earth as a center
Heliocentric measured or considered as being seen from the center of the sun
Apogee the point in the orbit of a heavenly body, especially the moon, or of a man-made satellite at which it is farthest from the earth.
Retrograde Motion Retrograde motion is the apparent motion of a planet to move in a direction opposite to that of other bodies within its system
Ellipse a plane curve such that the sums of the distances of each point in its periphery from two fixed points,
Astronomical Unit a unit of length, equal to the mean distance of the earth from the sun
Rotation the act of rotating; a turning around as on an axis.
Revolution a procedure or course, as if in a circuit, back to a starting point.
Precession the slow, conical motion of the earth's axis of rotation, caused by the gravitational attraction of the sun and moon, and, to a smaller extent, of the planets, on the equatorial bulge of the earth
Perihelion the point in the orbit of a planet or comet at which it is nearest to the sun.
Aphelion the point in the orbit of a planet or a comet at which it is farthest from the sun.
Preigree the point in the orbit of a heavenly body, especially the moon, or of an artificial satellite at which it is nearest to the earth.
Apogee the point in the orbit of a heavenly body, especially the moon, or of a man-made satellite at which it is farthest from the earth.
Phases of the Moon The moon has eight main phases: new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, third quarter and waning crescent
Solar Eclipse the obscuration of the light of the sun by the intervention of the moon between it and a point on the earth
Lunar Eclipse the obscuration of the light of the moon by the intervention of the earth between it and the sun
crater the cup-shaped depression or cavity on the surface of the earth or other heavenly body marking the orifice of a volcano.
Terrstrial planet inner planet
Jovian Planet any of the four large outer planets: Jupiter, Saturn, Uranus, and Neptune.
Nebula a cloud of interstellar gas and dust
Planetesimal one of the small celestial bodies that, according to one theory were fused together to form the planets of the solar system.
Asteroid any of the thousands of small bodies of from 480 miles (775 km) to less than one mile (1.6 km) in diameter that revolve about the sun in orbits lying mostly between those of Mars and Jupiter.
Comet a celestial body moving about the sun, usually in a highly eccentric orbit, consisting of a central mass surrounded by an envelope of dust and gas that may form a tail that streams away from the sun
Coma the nebulous envelope around the nucleus of a comet.
Meteroid any of the small bodies, often remnants of comets, traveling through space: when such a body enters the earth's atmosphere it is heated to luminosity and becomes a meteor.
Meteor a meteoroid that has entered the earth's atmosphere
Meteorite a mass of stone or metal that has reached the earth from outer space; a fallen meteoroid.
Electromagnetic Spectrum the entire spectrum, considered as a continuum, of all kinds of electric, magnetic, and visible radiation, from gamma rays having a wavelength of 0.001 angstrom to long waves having a wavelength of more than 1 million km.
Photon a quantum of electromagnetic radiation, usually considered as an elementary particle that is its own antiparticle and that has zero rest mass and charge and a spin of one
Spectroscopy the science that deals with the use of the spectroscope and with spectrum analysis.
Doppler effect the shift in frequency of acoustic or electromagnetic radiation emitted by a source moving relative to an observer as perceived by the observer: the shift is to higher frequencies when the source approaches and to lower frequencies when it recedes.
Refracting telescope an optical instrument for making distant objects appear larger and therefore nearer. One of the two principal forms
Reflecting telescope consists essentially of an objective lens set into one end of a tube and an adjustable eyepiece or combination of lenses set into the other end of a tube that slides into the first and through which the enlarged object is viewed directly; the other form
Radio Telescopes a system consisting of an antenna, either parabolic or dipolar, used to gather radio waves emitted by celestial sources and bring them to a receiver placed in the focus.
Hubble Telescope a telescope launched into orbit around the earth in 1990 to provide information about the universe in the visible, infrared, and ultraviolet ranges
Space shuttle any of several U.S. space vehicles consisting of a reusable manned orbiter that touches down on a landing strip after an orbital mission
Created by: 3084820
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