s4w6 Review formative -
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Last updated 5 months ago
16 questions
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| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
angular size | arrow_right_alt | a regular oval shape, traced by a point moving in a plane so that the sum of its distances from two other points (the foci) is constant |
period | arrow_right_alt | finding the angle between the line of site from one side of an object to another |
semi-major axis | arrow_right_alt | the distance from the center of an ellipse to furthest point |
astronomical unit | arrow_right_alt | the average distance from the earth to the sun |
ellipse | arrow_right_alt | the time interval of a repeating cycle |
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
epicycle | arrow_right_alt | slow rotation of the axis of a planet around another axis |
parallax | arrow_right_alt | how the position of an object changes with respect to its background when seen from different positions |
retrograde motion | arrow_right_alt | the idea that the earth is the center of the solar system |
geocentrism | arrow_right_alt | how planets seem to move backwards in their orbits |
precession | arrow_right_alt | a small circular orbit whose center moves around a larger circular orbit |
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
Tidal braking | arrow_right_alt | Deformation caused by gravitational forces between celestial bodies |
Synchronous rotation | arrow_right_alt | Temporary dimming of one celestial body by another |
Tidal bulge | arrow_right_alt | Gradual slowing down of rotation due to tidal forces |
Eclipse | arrow_right_alt | Rotates at the same rate as orbit |
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
the mass of a star | arrow_right_alt | pattern of the light tells us the makeup of the outermost layer of the earth |
doppler shift of the spectral analysis | arrow_right_alt | whether the star is moving towards or away from the earth |
Brightness of the star | arrow_right_alt | how much light is observed from earth |
luminosity of the star | arrow_right_alt | light output of the star based on light observed from earth and calculated distance to the star |
distance of the star | arrow_right_alt | parallax, speed of doppler shift, |
Age of a star | arrow_right_alt | uh... we can't really tell that about an individual star. we have theories about stars in general. |
spectral analysis of the light | arrow_right_alt | angular diameter, and then calculate the linear measurement with the distance found with parallel. (there are other methods of making more precise measurement as well) |
size of the star | arrow_right_alt | from measuring the speed of the orbits of the stars planets |
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
Radiative zone | arrow_right_alt | Energy is released by fusion |
Convection zone | arrow_right_alt | Energy is moved by photons being released, reabsorbed, and released again |
photosphere | arrow_right_alt | Energy is carried by moving atoms rather than photons |
Core | arrow_right_alt | transition layer where gases move from being transparent to opaque |
corona | arrow_right_alt | thin layer with strong red-emission lines that can be seen during an eclipse |
Chromosphere | arrow_right_alt | third hottest layer of the sun that has lowest amount of energy because of its low density |
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
Accretion disk: | arrow_right_alt | A rotating disk of gas, dust, and other matter that forms around massive objects in space due to gravity pulling material toward it |
Neutron star: | arrow_right_alt | The maximum mass (about 1.4 times the mass of our Sun) that a white dwarf star can have before it collapses under its own gravity |
Degeneracy pressure | arrow_right_alt | A quantum mechanical force that prevents certain types of stars from collapsing, created by electrons or neutrons being squeezed too close together |
Pulsar | arrow_right_alt | An extremely dense stellar remnant composed almost entirely of neutrons, formed when a massive star explodes and its core collapses |
Supernova: | arrow_right_alt | A powerful explosion that occurs at the end of a massive star's life, briefly outshining entire galaxies and spreading heavy elements into space |
Chandrasekhar limit: | arrow_right_alt | A rapidly rotating neutron star that emits regular pulses of radiation from its magnetic poles, acting like a cosmic lighthouse |