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38 Cards in this Set
- Front
- Back
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most of the stars in the milky way will end their lives as
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white dwarfs
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cluster of galaxies can form larger groups call
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superclusters
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an obsercation of the red shift of galaxies suggests that the universe is
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expanding
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in stars energy is prodecued primarilary as hydrogen atomes are combined to form
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helium atoms
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nearly 90 percent of all stars are at what pint in their life cycles
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mid-life
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the inner planets are separated from the outer planets by
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an asteroid belt
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elliptical galaxies often appear reddish due to an abundance of
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old stars
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the sun is
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a typical star
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our galaxy is classified as an
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spiral galaxy
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who fiest proposed that the universe is expanding
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hubble
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a star is born when
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nuclear fusion starts in the core
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our solar system is inside the
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milky way galaxy
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planets may have formed out of material orbiting the early sun through the process of
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accretion
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a light year is
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a unit of distance
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hotter stars glow with light that is more intense at
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shorter wavelengths (toward the blue end of the spectrum)
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the most widely accepted model of the formation of the solar system is the
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nebular model
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galaxies are classified based on their
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shape
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supergiants stars
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form supernovas
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astronomers estimate that the universe that the universe contains
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100 billion galaxies
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the great red spot is believed to be a giant storm in the atmosphere of
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jupiter
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the milky way galaxy contains interstellar matter that may
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form new stars
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all of the planets in our solar system
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orbit the sun
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which of the following does not have rings
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mars
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mercury is characterized by
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very extreme temperatures
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the surface temp of a star can be estimated based on the stars
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color
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the phases of the moon are determined by
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a relative positions of earth,sun, and moon
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____ first proposed that earth and the other planets orbit the sun
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copernicus
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which of the following is not an inner planet
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jupiter
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stars are held together by
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gravitational forces
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all stars
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produce their own light
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the big bang theory states that the universe began with a gigantic explosion
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10 to 20 billion years ago
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spiral galaxies often appear bluish due to an abundance of
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young stars
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energy is released in stars as a result of
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fusion reactions
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the number of universes known to exists is
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one
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besides the sun and the moon what is the brightest object in the sky
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venus
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not including the sun the closest stars to earth
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4.3 light years away
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kepler showed that the orbits of the planets are
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elliptical
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during a solar eclipse
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the moon blocks out the sun.
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