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Which of the following correctly shows the organization of the universe, from smallest to largest units?
the color of the light it gives off
star, star cluster, galaxy, galactic cluster, universe
Red-shift in light beyond the Local Group
The light observed from most galaxies shows that they are moving away from Earth in all directions.
all the matter and energy in space
the universe
47.5 trillion kilometers
distances to far-off galaxies
What is the best way for a scientist to estimate the age of a star?
the color of the light it gives off
star, star cluster, galaxy, galactic cluster, universe
Red-shift in light beyond the Local Group
The light observed from most galaxies shows that they are moving away from Earth in all directions.
all the matter and energy in space
the universe
47.5 trillion kilometers
distances to far-off galaxies
What best describes the universe?
the color of the light it gives off
star, star cluster, galaxy, galactic cluster, universe
Red-shift in light beyond the Local Group
The light observed from most galaxies shows that they are moving away from Earth in all directions.
all the matter and energy in space
the universe
47.5 trillion kilometers
distances to far-off galaxies
Which observation provides evidence that galaxies are moving apart and the universe is expanding?
the color of the light it gives off
star, star cluster, galaxy, galactic cluster, universe
Red-shift in light beyond the Local Group
The light observed from most galaxies shows that they are moving away from Earth in all directions.
all the matter and energy in space
the universe
47.5 trillion kilometers
distances to far-off galaxies
Before the Hubble telescope was put into orbit, what was NOT well know?
the color of the light it gives off
star, star cluster, galaxy, galactic cluster, universe
Red-shift in light beyond the Local Group
The light observed from most galaxies shows that they are moving away from Earth in all directions.
all the matter and energy in space
the universe
47.5 trillion kilometers
distances to far-off galaxies
Which of these is the largest?
the color of the light it gives off
star, star cluster, galaxy, galactic cluster, universe
Red-shift in light beyond the Local Group
The light observed from most galaxies shows that they are moving away from Earth in all directions.
all the matter and energy in space
the universe
47.5 trillion kilometers
distances to far-off galaxies
The Big Bang Theory, formation and expansion of the universe is supported by the observed...
the color of the light it gives off
star, star cluster, galaxy, galactic cluster, universe
Red-shift in light beyond the Local Group
The light observed from most galaxies shows that they are moving away from Earth in all directions.
all the matter and energy in space
the universe
47.5 trillion kilometers
distances to far-off galaxies
If light travels about 9.5 trillion kilometers (km) in one year, and a star is 5 light-years from Earth, about how far away is ti?
the color of the light it gives off
star, star cluster, galaxy, galactic cluster, universe
Red-shift in light beyond the Local Group
The light observed from most galaxies shows that they are moving away from Earth in all directions.
all the matter and energy in space
the universe
47.5 trillion kilometers
distances to far-off galaxies
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