stars Flashcards
(22 cards)
how does a star form
nebula
what does H and R mean in H-R diagram
Hertzsprung and russell
what is our sun also known as
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 the corona
are sunspots cooler than the surrounding areas
yes
are sunspots permanent
no
galaxy
a large group of stars,dust,and gas held together by gravity
milky way
a huge group of stars,dust,and gas
local group
a large group of galaxies
cosmology
study of how the universe began, how it continues to change
big bang theory
hubbles explanation for how the universe formed
cosmic background radiation
the residual microwave radiation emitted when the universe was very young
dark matter
an invisible form of matter that does not emit any detectable electromagnetic energy of its own
dark energy
invisible form of energy that creates a repulsive force causing the universe to expand at a faster rate
what shapes can a galaxy be
spiral, irregular, elliptical
what is the name of our galaxy
milky way galaxy
what shape is the milky way galaxy
spiral
how many galaxies are in our local group
50
what are the two largest galaxies in the local group
milky way Andromeda
where are we located at in the milky way
in the center in one of the arms
