sections 1&2 Flashcards
constellations
many of the names given to these groups of starts by ancient cultures remain today
radio telescope
collects and amplifies radio waves
light-year
distance light travels in one year
spectroscopes
uses a prism or diffraction grating to separate light into its component wavelengths
nebula
stars form from a large cloud of gas, ice, and dust
main sequence
stars include the broad band of starts from the hot, bright stars in the upper left corner of the diagram to the cool, dim stars in the lower right corner
giant star
as equilibrium ends, the star’s core contracts, the temperature increases
white dwarf
forms as the core of giant star no longer supports fusion and the star’s outer layer escape into space, leaving a hot and dense core
black hole
and area in space that is so dense that nothing can escape its pull of gravity
photo-sphere
the layer of the sun that emits light into space
sunspots
dark, cool areas in the photo-sphere where the sun’s magnetic field has weekend
supernova
a gigantic explosion in witch the temperature within the collapsing stars is 10 billion K and the atomic nuclei in the core split into neutrons and protons
neutron star
star explodes it leaves behind a ball of neutrons
how did some of the constellations get their name
stories, animals, and tools
what is the constellation named after a great hunter
O Ryan’s belt
what are the two dogs from O Ryan’s belt and what do they mean
Cains Minor- small dog
Cains Major- big dog
how many basic types optical telescope is there
two
what is a refracting telescope
it convex lens- curved on the out side
what is a reflecting telescope
its concave mirror- curved on the inside
why are are space telescope better the any on land
there is no clouds or anything blocking the view
what are the two name of the space telescopes
Chandra X-Ray Observatory and Spitzer Space Telescope
what are the three things that spectroscope determine about stars
chemical composition, its surface temperature, and whether it is moving away from or toward Earth
what dose a red wave length look like
it is more spread out cause the star is further way from Earth
what dose a blue wave length look like
it is more together cause the star is closer to Earth
where do stars form from
a nebula
where dose the H-R in H-R Diagram stand for
that is the initial of two peoples name Hertzsprung-Russel
what is our sun known as
a giant star
what are the interior layers of the sun
core
radiation zone
convection zone
what are the exterior layers of the sun
photo-sphere
corona
are sun spot permanent feature
false
