What is the term for the amount of energy released from each square meter of an objects surface each second?

129

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What do astronomers call the point in the sky that is directly overhead?

114

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What is the constant called that is the average flux of the suns energy arriving at the earth?

164

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The work of this harvard college observatory scientist made possible the first accurate determination of extragalactic distances by what is often called henriettas law?

81

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Of the three types of meteorites, which is the most common, in terms of the number of samples, to fall to earth in recorded history?

100

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What moon of neptune orbits in a retrograde direction?

105

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What is the name for the celestial body of interstellar gas and dust where stars are sometimes born?

105

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The 29 days it takes the moon to complete an orbit around the earth is called a?

92

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A meteor that reaches the surface of the earth is more accurately called a?

104

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Is the gravitational pull on an object equalized if the object is at the centre of a planet, i.e. Surrounded by the mass of the planet, which is creating the gravity?

121

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Which of the is not another name for the pleiades?

88

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The celestial coordinate analogous to latitude is called?

102

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Name the part of the sun that we can see without any instruments?

108

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When a superior planet is at quadrature in reference to the earth, what is its elongation in degrees?

173

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Maria on the moon are?

140

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