31.1 and 2 Flashcards
constellation
star pattern that appears to form images which astronomers used to identify other stars
radio telescope
radio that collects and magnifies radio sound waves
light year
distance light travel in one year 9.5 trillion km
spectroscope
device that disperes into its component wavelength
nebula
interstellar cloud of gas and ice
main sequence
section of the H-R diagram that is plotted on the upper left to the lower right and contains 90 percent of all known stars
white dwarf
giant star that has lost the outer layers leaving behind a hot dense core
supernova
gigantic explosion of a star
neutron star
produced by collapsing star when protons and electrons in the star’s core collide from neutrons
black hole
a region in space that is so dense that nothing can escape it inward pull of gravity
photosphere
layer in the sun that emits light into space
sunspots
darker, cooler areas of the suns photosphere
how some of the constellations got their names
They where in stories, animals and even tools.
what is the constellation of a great hunter called
Orion’s belt
what are the names of his two dogs
canis minor and canis major
how many basic optical telescopes are there
2
what is a refracting telescope
it uses convex lenses
what is a reflecting telescope
uses a mirror
what are the two names of the two optical telescopes
reflecting and refracting
what the two major space telescopes
chandra X-ray and Spitzer
giant star
late stage in a star’s life cycle that occurs when its hydrogen fuel is depleted
how are stars formed
by nebula
what does HR stand for in Hr diagram
Hertzprung Russel
what is our sun known as
a giant star
are sunspots permanent
no they disappear over time
