Astronomy Questions And Answers

41⟩ What are asteroids like?

Asteroids have several general features of interest.

1) Firstly, their formation - they all represent material that was not used in the initial formation of the solar system.

2) For whatever reason - chance and position - they did not form planets, and therefore were left scattered.

3) They do not represent much material - it is thought that if they were all joined together the mass would only be that of half of our Moon!

4) Most asteroids are in a 'belt' between Mars and Jupiter.

5) Some asteroids even have their own mini moons - for instance Ida and Dactyl.

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42⟩ Is there water in moon rock?

No! The tests on moon rock that has either reached earth, from meteorites or from rock brought back by astronauts, have brought a new meaning to the word dry!

Any water there was would have escaped long, long ago. This has affected the number of minerals possible on the moon - around 100 compared to the thousands on earth where water has enabled much more complexity.

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43⟩ Which of the following constellations cannot be seen in the summer sky of the northern hemisphere?

1. Libra

2. Orion

3. Ursa Major

4. Cygnus

Answer: B

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44⟩ What are gamma ray bursts?

Gamma ray bursts are one of the current mysteries that are still to be explained.

If we could see gamma ray wavelengths, we would see the sky glow - and much of this is from known sources like pulsars, quasars and so on. However, from time to time we have directly observed sudden pulses of gamma rays for a few seconds at a time.

These pulses pour out massive energy. The mystery is with regard the source of these gamma rays.

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45⟩ A solar eclipse can only occur at a

1. full moon

2. new moon

3. ½ gibbous moon

4. ¼ gibbous moon

Answer: B

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46⟩ What percent of stars in the sky that appear to be single stars are actually binary stars

1. about 90%

2. about 50%

3. about 20 %

4. about .5%

Answer: B

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47⟩ The 29 ½ days it takes the Moon to complete an orbit around the Earth is called a

1. synodic month

2. sidereal month

3. orbital month

4. solar month

Answer: A

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48⟩ In the Australian winter night sky, which of the following is true regarding the constellation Orion

1. it is seen in the western sky

2. it is seen in the southern sky

3. it is seen in the northern sky

4. it can never be seen

Answer: C

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49⟩ Which of the following is NOT true about meteorites

1. most of the meteorites that have been found have a high iron content

2. iron meteorites often contain 10 – 20% nickel

3. most of the iron meteorites are octahedrites

4. on rare occasions, acid-etched iron meteorites display a pattern called the Widmanstatten pattern

Answer: D

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50⟩ The apparent speed of the Sun along the ecliptic

1. is constant

2. varies during the solar year

3. varies only during winter

4. varies only during summer

Answer: A

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51⟩ According to Keplers Third Law, plotting the squares of the periods of the planet against the cubes of the semi- major axes of their orbits will result in what sort of graph

1. a parabolic line

2. a straight line

3. an irregular jagged line

4. a hyperbolic line

Answer: B

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52⟩ The time between two successive meridian transits of the Sun as observed from a stationary spot on the Earth’s surface is called

1. the stellar day

2. an apparent solar day

3. lunar day

4. an apparent solar month

Answer: B

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53⟩ The hydrogen envelope that surrounds the comets nucleus derives its hydrogen most directly from

1. gases escaping from the melting comet’s ice

2. hydrogen captured from interstellar space

3. breakdown of water by ultraviolet light

4. hydrogen in the solar winds

Answer: C

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54⟩ At a location half-way from the Equator to the North Pole, which of the following correctly describes the stars apparent motion

1. they move in circles parallel with the horizon

2. they rise and set vertically

3. they remain stationary

4. they rise and set at an angle to the horizon

Answer: D

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55⟩ Light from distant galaxies comes mostly from which of the following

1. low mass stars

2. high mass stars

3. ionized hydrogen nebula

4. large globular clusters of stars

Answer: B

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56⟩ Which of the following is NOT a superior planet

1. Jupiter

2. Venus

3. Mars

4. Pluto

Answer: B

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57⟩ Which of the following planets has the highest escape velocity

1. Saturn

2. Uranus

3. Jupiter

4. Mars

Answer: C

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58⟩ Astronomers usually detect the electromagnetic emissions of a single neutron star in what single form

1. cosmic radiation

2. microwaves

3. radio waves

4. infrared waves

Answer: C

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59⟩ An emission or bright line spectrum consists of

1. a series of bright lines superimposed on a black or continuous background.

2. a series of bright and dark lines superimposed on a black-lined grid

3. a series of faint black lines superimposed on a bright background

4. a circular array of dark ring patterns on a bright background

Answer: A

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60⟩ Maria on the moon are

1. darker and smoother parts of the moon’s surface

2. mountains of the moon

3. irregular craters

4. highland areas which show up as irregular contours

Answer: A

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Astronomy

Home Education and Science Astronomy

97 Astronomy Questions And Answers

41⟩ What are asteroids like?

42⟩ Is there water in moon rock?

43⟩ Which of the following constellations cannot be seen in the summer sky of the northern hemisphere?

44⟩ What are gamma ray bursts?

45⟩ A solar eclipse can only occur at a

46⟩ What percent of stars in the sky that appear to be single stars are actually binary stars

47⟩ The 29 ½ days it takes the Moon to complete an orbit around the Earth is called a

48⟩ In the Australian winter night sky, which of the following is true regarding the constellation Orion

49⟩ Which of the following is NOT true about meteorites

50⟩ The apparent speed of the Sun along the ecliptic

51⟩ According to Keplers Third Law, plotting the squares of the periods of the planet against the cubes of the semi- major axes of their orbits will result in what sort of graph

52⟩ The time between two successive meridian transits of the Sun as observed from a stationary spot on the Earth’s surface is called

53⟩ The hydrogen envelope that surrounds the comets nucleus derives its hydrogen most directly from

54⟩ At a location half-way from the Equator to the North Pole, which of the following correctly describes the stars apparent motion

55⟩ Light from distant galaxies comes mostly from which of the following

56⟩ Which of the following is NOT a superior planet

57⟩ Which of the following planets has the highest escape velocity

58⟩ Astronomers usually detect the electromagnetic emissions of a single neutron star in what single form

59⟩ An emission or bright line spectrum consists of

60⟩ Maria on the moon are

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Astronomy

Home Education and Science Astronomy

97 Astronomy Questions And Answers

41⟩ What are asteroids like?

42⟩ Is there water in moon rock?

43⟩ Which of the following constellations cannot be seen in the summer sky of the northern hemisphere?

44⟩ What are gamma ray bursts?

45⟩ A solar eclipse can only occur at a

46⟩ What percent of stars in the sky that appear to be single stars are actually binary stars

47⟩ The 29 ½ days it takes the Moon to complete an orbit around the Earth is called a

48⟩ In the Australian winter night sky, which of the following is true regarding the constellation Orion

49⟩ Which of the following is NOT true about meteorites

50⟩ The apparent speed of the Sun along the ecliptic

51⟩ According to Keplers Third Law, plotting the squares of the periods of the planet against the cubes of the semi- major axes of their orbits will result in what sort of graph

52⟩ The time between two successive meridian transits of the Sun as observed from a stationary spot on the Earth’s surface is called

53⟩ The hydrogen envelope that surrounds the comets nucleus derives its hydrogen most directly from

54⟩ At a location half-way from the Equator to the North Pole, which of the following correctly describes the stars apparent motion

55⟩ Light from distant galaxies comes mostly from which of the following

56⟩ Which of the following is NOT a superior planet

57⟩ Which of the following planets has the highest escape velocity

58⟩ Astronomers usually detect the electromagnetic emissions of a single neutron star in what single form

59⟩ An emission or bright line spectrum consists of

60⟩ Maria on the moon are

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