30.1 and 30.2 Flashcards
(33 cards)
Constellations
names given to group of stars
radio telescope
collects and amplifies radio waves
light-year
the distance light travels in one year
How do constellations get there names
characters from stories, animals and tools
What is the constellation of the Great Hunter
Orion belt
What are the names of Orions hunting dogs
Canis Major - Cansis Minor
What do they mean
Big dog, and little dog
How many optical telescopes are there
2
What does a refracting telescope use
Convex lens
What does a reflecting telescope use
mirror
Why are space telescopes better to use than ground base telescopes
No clouds or pollution
What things can a Spectroscope determine about a
star
chemical composition, surface temperature, whether its moving closer or further away
Stars farther away appear to be what color, and
the wavelengths appear what colors
more spread out
Stars closer appear what
Blue, and more frequent
Sunspots
are dark, cool areas in the photosphere where the sun’s magnetic field has weakend
photosphere
the layer of sun that emits light onto space
black hole
an area in space that is so dense that nothing can escape its pull of gravity
neutron star
when the star explodes it leaves behind a ball of neutros
supernova
collapse release a huge amount of energy and very fast moving neutrons
white dwarf
as the core of a giant star no longer supports fusion and the stars outer layers
giant star
star core contracts, the temperature increases and the star evolves to a giant star
main sequence
stars that include the broad band of stars from the hot bright stars
nebula
stars form from a large cloud of gas, ice, and dust
spectroscope
a prism or diffraction grating to separate light
