Show:
stars
EMS
star systems & galaxies
life of stars
misc
100
patterns of stars in the sky
constellations
100
T or F Sound waves are a part of the electromagnetic spectrum?
Nooooo False
100
double stars are called
binary stars
100
The earliest stage of a stars life that forms within the nebula.
protostar
100
color of the hottest stars
blue
200
telescope that orbits Earth and takes most of our APOD.
Hubble Space telescope
200
The distance between the crest of one wave of electromagnetic radiation and the crest of the next one is its
wavelength
200
three types of galaxies
spiral, elliptical, irregular
200
How long a star lives depends on its
mass
200
the name of the graph that shows luminosity and temperature of stars
H-R diagram Hertzsprung-Russell diagram
300
Used to measure the distance of nearby stars (not stars that are far away)
parallax
300
What portion of the EMS has waves of the highest frequency? and the lowest?
gamma rays and radio waves
300
type of galaxy that contains mostly OLD stars
elliptical
300
After a ____________ explosion, massive stars will end their lives as either a ________ or a _____________.
supernova, black hole & neutron star
300
Distant galaxy with a GIANT black hole at its center. (also very bright!!!!)
quasar
400
A _______________ is a unit of DISTANCE. It is used to measure DISTANCES in space because miles and km just won't do.
light-year
400
Can astronauts talk in space? IF so how?
There is no air therefore no sound in space. Sound is carried by vibrations of molecules. When you talk here on Earth, air molecules transmit the vibrations and allow others to hear you. In open space there are very few molecules at all so there is nothing to carry the vibrations. Radios use radio waves to transmit information from one to another. These waves move through space by themselves so they can be transmitted from one astronaut to another.
400
Process where Hydrogen + Hydrogen yield Helium + energy
fusion
400
A neutron star that appears to produce pulses of radio waves is called
pulsar
400
Tell the difference between absolute and apparent magnitude.
-absolute magnitude is the brightness of a star as seen if all stars were the same distance from Earth. -relative magnitude is the brightness of a star as seen from Earth.
500
A ________ breaks the light from an object into colors and photographs the resulting spectrum.
spectrograph
500
Explain how an astronomer uses the EMS to study the stars.
Scientists use the light from a star to determine the composition of that star.
500
Planets orbiting other stars outside of our solar system.
exoplanets
500
Tell the life stages of a medium sized star like the Sun.
protostar-red giant-white dwarf-black dwarf
500
Most stars have a chemical composition similar to the sun. That is about 73% __________, 25% _____ and 2% other elements.
hydrogen and then helium