Show:
Stars
Sun
Galaxies
Cosmology
Magnitude
100
Scientists think that the universe will __________________
expand forever
100
What type of galaxy is the Milky Way?
spiral galaxy
100
What do the pattern of lins in a star's absorption spectrum represent?
some of the elements in the star's atmosphere
100
Why do scientists study distant galaxies to learn about early galaxies?
It takes a long time for light to travel through space, looking at distant galaxies shows what early galaxies look like.
100
The brightest star as seen from Earth.
apparent magnitude
200
What does a star's color indicate?
its temperature
200
Which of the following is the largest? a nebula, a galaxy, a neutron star, a globular cluster
a galaxy
200
Elliptical galaxies and the halos of spiral galaxies contain groups of stars called
globular clusters
200
What type of star has used up all of its hydrogen and is the leftover center of an older star?
white dwarf
200
The diagonal pattern on the H-R diagram where most stars appear.
main sequence
300
The H-R diagram shows the relationship between a star's surface temperature and its
absolute magnitude
300
On what part of the modern H-R diagram do cool, bright, red stars appear?
bottom, right
300
According to the big bang theory, what filled the universe after the original explosion?
cosmic background radiation
300
The study of the origin, structure, and future of the universe.
Cosmology
300
An object so massive and dense that not even light can escape its gravitational pull.
black hole
400
Which of the following it the hottest? red giant superstar, small, white dwarf star, main-sequence yellow star, main-sequence blue star
main-sequence blue star
400
What is one way scientists use to calculate the age of the universe?
They measure the distance from Earth to varioius galaxies.
400
The universe is organized according to
a loosely arranged structure
400
The distance that light travels in one year; about 9.5 trillion kilometers.
light-year
400
The brightness of a star at a distance of 32.6 light-years from Earth.
absolute magnitude
500
According to the big bang theory, how old is the universe?
13.7 billion years old
500
Why do black lines appear on an absorptoin specturm?
Black lines appear where colors of light are absorbed by a star's atmosphere.
500
What are the three major types of galaxies identified by Edwin Hubble?
spiral, elliptical, and irregular
500
A distant, starlike source of light.
quasar
500
Who is going to pass this test will flying colors and demonstrate their retention of the information they have learned?
YOU ARE!!!!!!!!