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