According to the HR diagram, what is the approximate absolute magnitude of Rigel?

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According to the Big Bang Theory, which graph best represents the relationship between time and the size of the universe from the beginning of the universe to the present?

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365 1/4 days =________

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As Earth_________ on its __________, only one side of the planet faces the Sun at a time.

The longest day of the year, with regard to the amount of daylight (in the Northern Hemisphere) is during the _________________.

What is represented by the diagram at the right?

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^{The diagram below represents a simple geocentric model. Which object is represented by the letter X?}

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At which two positions of the Moon is an eclipse of the Sun or Moon possible?

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The Milky Way Galaxy is best described as _________.

At the time indicated in this diagram, what season is it in the northern hemisphere?

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The lifetime of a star depends on its beginning

Which planet will take the longest time to orbit the Sun?

According to the Big Bang Theory, the universe is

Which of the following lists the correct order of the four outer planets from the sun?

Which motion causes Earth to experience a year?

If a full moon occurs on March 1, which date during the same month would you see another full moon?

What does the Big Bang theory suggest?

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Which star is the coldest?

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What type of galaxy is this?

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Which category is our Sun located in?

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Which star is considered a Main Sequence Star? A, B, C, or D?

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Which star is a yellow super giant with a similar luminosity to the sun?

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The graph below shows the diameters of the planets. The diameter of a planet is the distance from one side to the other through the middle at the widest part. Which two planets are closest in size?

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Pluto is called a dwarf planet. It is smaller than the planets in the solar system. The size of each solar system planet is listed in the table below. Which planet is MOST likely closest to Pluto in size?

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As a star uses up its Hydrogen supply, it changes from a Main Sequence star to a-

The universe is approximately how old?

Our solar system formed from a giant rotating cloud of dust and gas called a

Seasons are caused by Earth's revolution and

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What process produces the Sun’s energy

Which planet is fifth from the sun?

What type of galaxy is this?

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Which letter indicates the position of the moon during full moon?

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Which star type has a luminosity of 10^-3 and a temp. of 18,000 on the H-R scale?

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What are dark, cooler areas on the sun's surface called?

Name the moon phase . . .

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Name the moon phase . . .

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A student makes a model to depict the motion of a planet and a moon around the Sun. Which model accurately shows the motion of the planet and moon?

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How would the gravitational force between the Earth and the Moon change if the Moon was twice as far away?

Halley’s Comet is a well-known space object named after Edmond Halley, who studied comets. Halley’s Comet is visible from Earth and last appeared in the inner solar system in 1986; it is scheduled to return in 2061.What is primarily responsible for giving Halley’s Comet a predictable return date?

Which planet obits the Sun in the shortest amount of time?

Which type of eclipse is shown in the diagram?

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When the light of the moon is increasing, we say it is ________________________.

The two most common elements in stars is ...

As the earth rotates on its axis, the constellations and stars in them appear to _________.

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Which star is considered a Main Sequence Star?

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According to the table, which planet spins the fastest?

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The symbols below represent the Milky Way galaxy, the solar system, the Sun, and the universe. Using the symbols below, which arrangement of symbols is most accurate?

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A telescope that uses a set of lenses to gather and focus light from distant objects is a _____.

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Leap year was established because