Science test 2/4
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what are some characteritics of the corona ?
irregular shaped can extend for million killometers hottest atmosphere layers
which correctly sequences the major steps in star formation
nebula forms -> fusion starts -> protostar forms -> fusion begins
a group of stars that includes the sun
milkyway
a group of stars that contains very little gas or dust but many older stars
eliptical galaxy
its shape is the result of gravitational pull of neighboring galaxies
irregular galaxy
used to measure the distance between earth and Venus
astronomical unit
the brightness of a star or other objects in space as it appears from Earth
apparent magnitude
a galaxy with arms radiating from its central gulge
spiral galaxy
the light emitted by a star is not related to the stars-
number of layers
The Big Bang Theory states that-
the universe began fro one point billions of years ago
the fact that distant galaxies and clusters are moving away from earth is one piece of evidence that supports the-
Big Bang theory
the true brightness of any object in space
luminosity
used to measure distance between stars
light year
what happens in the core
fusion takes place
how do astronomers recognize regions in the sky
constalations