please help me i have only 30mins Flag this Question Question 11 pts One AU is a

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please help me i have only 30mins

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Question 11 pts

One AU is approximately how many miles

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Question 21 pts

Which of the following galaxies are part of our Local Group?

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Question 31 pts

Aristarchus is noted for having

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Question 41 pts

On December 21 the Earth's rotation axis is tipped so that

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Question 51 pts

If you wanted to find any planet in the night sky, you'd look for it in the

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Question 61 pts

Which of the following statements is false?

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Question 71 pts

The Moon is a waxing crescent on the night of November 13th. On what day (approximately) will be it be full?

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Question 81 pts

Kepler

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Question 91 pts

Galileo

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Question 101 pts

X-ray telescopes are important to modern astronomers because they can detect the presence of

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Question 111 pts

If you are shopping for a telescope, what feature most closely associated with performance would be your first consideration?

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Question 121 pts

An asteroid is located between Mars and Jupiter. The semi-major axis of the asteroid's orbit around the Sun is 4 Au. From Kepler's second law, the period of the asteroid's orbit is ______ years.

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Question 131 pts

At what times will a new moon be visible?

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Question 141 pts

At the summer solstice in the northern hemisphere

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Question 151 pts

How would you name the 7th brightest star in the constellation Orion?

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Question 161 pts

How many zodiacal constellations are there?

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Question 171 pts

How do astronomers learn what elements are present in a given star?

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Question 181 pts

The first evidence of the validation of Newton’s law of gravity was

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Question 191 pts

Spring tides are very large high tides and very small low tides. When do they occur?

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Question 201 pts

What phase of the Moon must it be to have a solar eclipse?

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Question 211 pts

Which of the following statements is true about the different kinds of telescopes?

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Question 221 pts

The most abundant element in the universe which is found in most stars and outer space nebula is

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Question 231 pts

Which EM wave has the higher energy?

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Question 241 pts

Visible light has a wavelength of about

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Question 251 pts

Which of the following statements is false concerning eclipses?

Explanation / Answer

Q1) One Astronomical unit (AU) is the average distance between the sun and earth which is approximately 93 million miles or 150 million kilometers.

Q2) The Andromeda Galaxy (about 2.5 million light years away) and M33 (triangulum galaxy) forms a local group of galaxies with the milky way galaxy.

Q3) Aristarchus of Samos, a greek astronomer, was the first to propose that the earth moves around the sun.

Q4) On December 21, the day of winter solstice, the earth's rotation axis is tipped most strongly away from the sun.

Q5) If you were to look for a plant in the night sky, you would look for it in the Zenith (the most powerful point).

Q8) Kepler discovered that planets move in ellipses, not circles.

Q9) Galileo developed mathematical laws of motion and theory of gravity.

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