Card Set Information
How bright an object looks from Earth
Light output of an object
Metric system, English system examples
(nano, micro, milli, centi, deci, -meter, deca, hecto, kilo, mega, giga) Miles, Kilometers,
what are measurements used to measure distance in the solar system, Milky Way, and astronomy in general
Light years, Astronomical units. etc.
what is 10 to the 4th and what is 10 to the negative 4th
what does the H-R diagram measure
Intrinsic Brightness, Faintness, Size, Temperature, absolute magnitude
what temp and and absolute magnitude is the sun
size of the milky way
30-40 kiloparsecs, or 100,000 lightyears.
Meteoroid, meteor, meteorite.
meteriod is in space, meteor, is entering the atmosphere, meteorite is a rock on our ground
diameter of the sun compared to earth
109 earth diameters
mass of the sun compared to earth
332,943 earth masses
interior of sun has how many zones? and what are they
3 zones, core, radiation, convection
what produces the suns energy, (how does the sun work with the energy)
the Core then the radiation has it carried outward by photons, and the convection zone has energy carried outward by mass motion convection.
the sun has an atmosphere with how many layers? what are they
photosphere temp is 5,750K, chromosphere temp is 100,000K , Corona is 1-2 x10 ot the 6th K
long term features (few weeks) cooler regions in the photosphere
short term features columns of gases moving in photospere bright: blue-shifted; dark; red-shifted
bright, hot gases located near sunspots
how long is a solar cycle
11 year period(butterfly pattern), 22 year period(magnetic field of sun flips)
general expulsion of material from the Sun, in the form of highly charged particles, made of ionized Hydrogen, protons and electrons.
what are most things on the sun controlled by?
magnetic activity of the Sun
what is the inward force(s) of the sun
what are the outward forces of the sun?
Gas pressure, radiation pressure
why doesnt the sun blow itself apart? and what is it called
because inward forces balance outward forces, Hydrostatic equilibrium
what creates sunspots
energy sources (sun)
Combustion-fossil fuel, Contraction- conversion of gravitational potential energy to kinetic energy to thermal energy
Total random, microscopic, kinetic Energy of particles in a substance
Celcius, Farenhieght, Kelvin, Average random, microscopic K.E. of the particles in a substance
properties measured of stars are?
Luminosity, size, temperature, Mass
most direct method of determining stellar distances is to use the-----
what is a Parsec
distance measurement, 1pc= 3.26 light years, 1pc= 206,265 AUs
what are the two things that determine the apparent magnitude of a star(don't think complicated)
Luminosity and distance
brightness of a star seen from 10 Parsecs
Type (_)'s of stars
O B A F G K M
what 95% of stars can be found on the ____________ and they are mostly________
Main sequence, Dwarf stars