Astronomy Ch 21-
Terms in this set (35)
chemical composition is determinad by this theroy. It describes the atom as having a neclues with postive protons and neutral neutrons
an electron can move toward the nucleus by falling inward from an other shell to can inner shell. when this happens, energy is released in the form of a piece of light
passing a star's light through a prism will display all the visible light waves in the fashion of a rainbow or spectrum. If all the colors are present. the spectrum is ...
A star's light will produce a spectrum with many brightly colored lines over a faint continuous spectrum in the background
when a star's light passes through gasses this spectrum reveals which elements are present.
astronomers use the absolute brightness of.... of the star when making the HR diagram
Hertzsprung Russell diagram and produce a fairly straight line which slopes form the upper left to the lower right
(cool stars) the brightness comes form their very large size- very bright
very hot - although quite faint - due to the fact that they are exceptionally small in size - lower left region of the HR diagram
stars farther away than the edge of our galaxy requires this method to determine their distance
galaxies in all direction are moving away from all other galaxies; an the father a galaxy is away the faster it is moving
(one way to harness nuclear energy) - involves breaking apart complex atoms.
(the opposite of nuclear fission) - begins with simple atoms and involves forcing them together to make more sophisticated atoms.
Triple Alpha Process
as the x-rays propagate out ward from the core (layer of the Sun) converts the x-rays by fluorescent effects in to nearly all the frequencies in the electromagnetic spectrum
once the waves emerge through the reversing layer they have reached the surface of the Sun( Greek word meaning light)
occasionally the sun has dark spots which usually come in pairs on its surface - these spots which are strong magnetic fields
The magnetic field produced by the sun spots can heart the surface until nuclear fusion occurs in those areas - it is the effect of a gigantic hydrogen bomb on the sun's surface
Particles that reach Earth- pass through the atmosphere above the poles they cause the air to glow producing the Northern and Southern lights or...
occasionally large clouds of hydrogen gas risen an arch from the photosphere
Above the photosphere- a thin layer of gas that can be seen only during an eclipse of the sun
The chromosphere extends out on either side of the sun producing the Sun's ...
T- Tauri Star
New Stars (because the first example were found in the constellation of Taurus the Bull)
some small clouds of hydrogen gas do not produce gravity to cause the cloud to develop into a normal star - they emit a very small amount of light
huge star, cooling down to a red color and it is dying (star)
in the process of popping, the star often sends out a ring of gaseous debris
(white dwarf moves into) dissipates its heat into space and it becomes darker and darker
the entire center of the once massive star becomes nothing but neutrons... formed, the combination of electrons and protons should produce extremely small particles called neutrons.
short pulse or beep in our radio telescopes, one plus for each rotation of the star. sometimes neutron stars are called
consequently no light can escape form these objects so they are seen as dark voids in space
the process of devouring stars by black holes is thought to explain the mechanism behind....
Binary variable star
1st this is a bright star that has a dark companion star revolving around it
3rd this is unusual because the shift can vary so rapidly (variable star)
4th variable star - these are the most common variable stars and are usually red, thus cool stars