Chapter 31 section 1 and 2 Flashcards
(33 cards)
constellation
names given to group of stars by ancient cultures
radio telescope
collects and amplifies radio waves
light-year
is the distance light travels in one year
spectroscope
uses a prism or diffraction grating to separate light into its component wavelengths
nebula
starts form from a large cloud of gas, ice, and dust
main sequence
stars include broad band of stars from hot bright stars in the upper left corner of diagram to cool dim stars in the lower right corner
giant star
equulibrium ends the stars core contracts the temperatures increases and the star evolves
white dwarf
forms as the core of a giant star no longer supports fusion and the stars outer layers escape into space leaving a hot and dense core
black hole
is an area in space that is so dense that nothing can escape its pull of gravity
photosphere
the layer of the sun that emits light into space
sunspots
are dark cool areas in the photosphere where the suns magnetic field has weakened
supernova
collapse releases a huge amount of energy and very fast moving neutrons
neutron star
when the star explodes it leaves behind a ball of neutrons
how did some of the constellations get their name
after characters in stories
what is the constellation called thats named after a great hunter
orion
what are the constellations called that are named after the great hunters dog
Canis major and canis minor
how many basic types of optical telescopes are there
two
what are the names of the optical telescopes
refracting and reflecting telescope
what is a refracting telescope
it uses convex lenses
what is a reflecting telescope
uses mirror to collect and focus light
what is radio telescope
uses radio waves
what is a space telescope
look past things affecting the image
why are space telescopes better telescopes better to use
does not have earths atmosphere effecting its image
what are the two names of the space telescopes
Chandra X-Ray Observatory and Spitzer Space Telescope
