Vocab section 1 and 2 Flashcards
constellations
groups pf stars named by ancient cultures
radio telescope
collects and amplifies radio waves
light year
is the distance light travels in one year (9.5 km)
spectroscope
uses a prism or diffraction getting separate light into its component wavelengths
nebula
stars form from a large cloud of gas ice and dust
main sequence
stars include the broadband of stars from the hot bright stars in the upper left corner of the diagram to the cool
giant star
as equilibrium ends the stars core contracts, 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
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
dark cold areas in the photosphere where the suns magnetic field has weakened
super nova
a gigantic explosion in which the temperature within is 10k billion k and the atomic nuclei split
neutron star
when a star explodes it leaves behind a ball of neutrons
How do constellations get their names
characters from stories
animals
tools
What is the name of the constellation of the great hunter
orion’s belt
What are names of the constellations names of orion’s hunting dogs
canis major
canis minor
What does canis major and minor mean
big dog and little dog
how many basic optical telescopes are there
2
what does a refracting telescope use
convex lense
what does a reflecting use
mirrors
why are space telescopes more effective than ground telescopes
cause there is no clouds or pollution
what can a spectroscope determine about a star
chemical composition
surface temperature
weather the star is moving closer or farther from earth
stars farther away from earth appear what color and what are its wavelengths
red and more spread out
Stars close to earth appear to be what color and what are its wavelengths
blue and and closer together
How does a star form
nebula
What does the h and R stand for in H-R diagram
Hertzsprung and russell
what is another name for our sun
giant star
what are the interior layers of the sun
core, radiation zone, convection zone
what is the name of the surface of the sun
photosphere
what is the atmosphere of the sun composed of
chromosphere and corona
are sun spots cooler than the surrounding areas
yes
are sun spots permanent
no
