Background radiation detected in space is believed to be evidence that

Billions of stars in the same region of the universe are called

In which group are the parts listed in order from oldest to youngest?

The great system of 200 billion stars to which the sun and our solar system belong to is the

A star differs from a planet in that a star

The sun's energy is most likely the result of of the

Nuclear fusion can only occur in areas of

As star color changes from blue to red, the surface temperature of the star

A luminosity and temperature of stars diagram classifies a star of high temperature and low luminosity as a

Base your answer to this question on the Characteristics of Stars diagram in the Earth Science Reference Tables.

A main sequence star is 1000 times more luminous than the sun. The temperature is likely to be most nearly

Base your answer to this question on the Characteristics of Stars diagram in the Earth Science Reference Tables.

A white dwarf star has a temperature of 13,000 K. What is the probable luminosity of the star?

Base your answer to this question on the Characteristics of Stars diagram in the Earth Science Reference Tables.

A giant star has a luminosity of 300. Its color is most likely to be

Base your answer to this question on the Characteristics of Stars diagram in the Earth Science Reference Tables.

An orange star has a temperature of 4000 K and is 500,000 times as luminous as the sun. To which group does it belong?

Base your answer to this question on the Characteristics of Stars diagram in the Earth Science Reference Tables.

The nearest star to the sun is Alpha Centauri. How does this star compare to the sun?

Base your answer to this question on the Characteristics of Stars diagram in the Earth Science Reference Tables.

The sun is best described as a

Base your answer to this question on the Characteristics of Stars diagram in the Earth Science Reference Tables.

The sun is brighter than any star in the group of

Base your answer to this question on the Characteristics of Stars diagram in the Earth Science Reference Tables.

Which type of star is associated with the last stage in the evolutionary development of most stars?

Comets are considered to belong to the solar system if they

A person observes that a bright object streaks across the nighttime sky in a few seconds. What is this object most likely to be

A belt of asteroids is located an average of distance of 503 million kilometers from the sun. Between which two planets is this belt located?

Which is not included in our solar system?

in the last billion years when meteorites, asteroids, or comets collided with Earth, which has occurred?

Today it is most commonly believed that our solar system formed

The Jovian planets have more gravitational pull than the terrestrial planets. Therefore they have

Which graph best illustrates the relationship between the diameter of a planet versus the distance of the planet from the sun?

Which graph best illustrates the relationship between the time it takes a planet to make one revolution around the sun versus the distance of the planet from the sun?

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The planet that has the shortest day is

Use your Earth Science Reference Tables for the following question
Which member of the solar system has an equatorial diameter of  $3.48\times10^3$  kilometers

The planets known as "gas giants," or Jovians, include Jupiter, Uranus and

Which three planets are known as terrestrial planets because of their high density and rocky composition.

Astronomers have observed a reddish spot on the surface of Jupiter. From observations of this spot, it is possible to estimate the

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Which planet takes longer for one spin on its axis than for one orbit around the sun.

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Which planet revolves fastest in its orbit?

Which diagram best approximates the shape of the path of Earth as it travels around the sun?

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Which planet's orbit is most nearly circular?

As the distance between two objects in the universe increases, the gravitational attraction between these two objects

The diagram shows Earth (E) in orbit about the sun. If gravitational force were suddenly eliminated, toward which position would Earth then move?

The force of gravity between two objects is greatest when