1. In the late 1920's, after examining the photographs of the structural appearance
2. of galaxies, Edwin P. Hubble, the American astronomer, classified the galaxies
3. into three distinct groups. These galaxies are comprised of stars that have
4. diverse structure, unequal degree of brightness, and definitely varied sizes
5. One group spirals, is highly luminous and has either a normal or a barred
6. structure. Normal spirals have two arms which radiate from the center of the
7. galaxy to the exterior edges. The two contrasting arms are enclosed in a disk
8. structure made of stars, however, in the barred structure the arms radiate
9. from the top and the bottom of a bright bar that goes through the nucleus of the
10. galaxy. Barred spirals account for nearly 25 percent of all spirals. Over two-
11. thirds of eminent, highly luminous galaxies are Spirals. The Milky Way and
12. The Andromeda are examples of spiral galaxies. Another group referred to as
13. elliptical galaxies exhibits soft, but dim brightness and has two subgroups: The
14. giant and the dwarf. While the giant elliptical galaxies have countless large
15. luminous stars, the dwarf ellipticals have a smaller number of less luminous
16. stars. Together they make up less than one-third of the galaxies. The last group
17. is the irregularly-shaped galaxies, which are non-symmetric, and their pattern is
18. rather chaotic. They account for 3% of the galaxies and their luminosity is
19. quite grainy. The Magellanic Cloud is an example of an irregularly shaped-galaxy.
According to the passage, the barred structure is a subgroup of which of the following galaxies?
1. In the late 1920's, after examining the photographs of the structural appearance
2. of galaxies, Edwin P. Hubble, the American astronomer, classified the galaxies
3. into three distinct groups. These galaxies are comprised of stars that have
4. diverse structure, unequal degree of brightness, and definitely varied sizes
5. One group spirals, is highly luminous and has either a normal or a barred
6. structure. Normal spirals have two arms which radiate from the center of the
7. galaxy to the exterior edges. The two contrasting arms are enclosed in a disk
8. structure made of stars, however, in the barred structure the arms radiate
9. from the top and the bottom of a bright bar that goes through the nucleus of the
10. galaxy. Barred spirals account for nearly 25 percent of all spirals. Over two-
11. thirds of eminent, highly luminous galaxies are Spirals. The Milky Way and
12. The Andromeda are examples of spiral galaxies. Another group referred to as
13. elliptical galaxies exhibits soft, but dim brightness and has two subgroups: The
14. giant and the dwarf. While the giant elliptical galaxies have countless large
15. luminous stars, the dwarf ellipticals have a smaller number of less luminous
16. stars. Together they make up less than one-third of the galaxies. The last group
17. is the irregularly-shaped galaxies, which are non-symmetric, and their pattern is
18. rather chaotic. They account for 3% of the galaxies and their luminosity is
19. quite grainy. The Magellanic Cloud is an example of an irregularly shaped-galaxy.
The word "eminent" in line 11 is closest in meaning to which of the following?
1. In the late 1920's, after examining the photographs of the structural appearance
2. of galaxies, Edwin P. Hubble, the American astronomer, classified the galaxies
3. into three distinct groups. These galaxies are comprised of stars that have
4. diverse structure, unequal degree of brightness, and definitely varied sizes
5. One group spirals, is highly luminous and has either a normal or a barred
6. structure. Normal spirals have two arms which radiate from the center of the
7. galaxy to the exterior edges. The two contrasting arms are enclosed in a disk
8. structure made of stars, however, in the barred structure the arms radiate
9. from the top and the bottom of a bright bar that goes through the nucleus of the
10. galaxy. Barred spirals account for nearly 25 percent of all spirals. Over two-
11. thirds of eminent, highly luminous galaxies are Spirals. The Milky Way and
12. The Andromeda are examples of spiral galaxies. Another group referred to as
13. elliptical galaxies exhibits soft, but dim brightness and has two subgroups: The
14. giant and the dwarf. While the giant elliptical galaxies have countless large
15. luminous stars, the dwarf ellipticals have a smaller number of less luminous
16. stars. Together they make up less than one-third of the galaxies. The last group
17. is the irregularly-shaped galaxies, which are non-symmetric, and their pattern is
18. rather chaotic. They account for 3% of the galaxies and their luminosity is
19. quite grainy. The Magellanic Cloud is an example of an irregularly shaped-galaxy.
The word "their" in line 18 refers to which of the following?
1. In the late 1920's, after examining the photographs of the structural appearance
2. of galaxies, Edwin P. Hubble, the American astronomer, classified the galaxies
3. into three distinct groups. These galaxies are comprised of stars that have
4. diverse structure, unequal degree of brightness, and definitely varied sizes
5. One group spirals, is highly luminous and has either a normal or a barred
6. structure. Normal spirals have two arms which radiate from the center of the
7. galaxy to the exterior edges. The two contrasting arms are enclosed in a disk
8. structure made of stars, however, in the barred structure the arms radiate
9. from the top and the bottom of a bright bar that goes through the nucleus of the
10. galaxy. Barred spirals account for nearly 25 percent of all spirals. Over two-
11. thirds of eminent, highly luminous galaxies are Spirals. The Milky Way and
12. The Andromeda are examples of spiral galaxies. Another group referred to as
13. elliptical galaxies exhibits soft, but dim brightness and has two subgroups: The
14. giant and the dwarf. While the giant elliptical galaxies have countless large
15. luminous stars, the dwarf ellipticals have a smaller number of less luminous
16. stars. Together they make up less than one-third of the galaxies. The last group
17. is the irregularly-shaped galaxies, which are non-symmetric, and their pattern is
18. rather chaotic. They account for 3% of the galaxies and their luminosity is
19. quite grainy. The Magellanic Cloud is an example of an irregularly shaped-galaxy.
Which of the following does the passage mainly discuss?
1. In the late 1920's, after examining the photographs of the structural appearance
2. of galaxies, Edwin P. Hubble, the American astronomer, classified the galaxies
3. into three distinct groups. These galaxies are comprised of stars that have
4. diverse structure, unequal degree of brightness, and definitely varied sizes
5. One group spirals, is highly luminous and has either a normal or a barred
6. structure. Normal spirals have two arms which radiate from the center of the
7. galaxy to the exterior edges. The two contrasting arms are enclosed in a disk
8. structure made of stars, however, in the barred structure the arms radiate
9. from the top and the bottom of a bright bar that goes through the nucleus of the
10. galaxy. Barred spirals account for nearly 25 percent of all spirals. Over two-
11. thirds of eminent, highly luminous galaxies are Spirals. The Milky Way and
12. The Andromeda are examples of spiral galaxies. Another group referred to as
13. elliptical galaxies exhibits soft, but dim brightness and has two subgroups: The
14. giant and the dwarf. While the giant elliptical galaxies have countless large
15. luminous stars, the dwarf ellipticals have a smaller number of less luminous
16. stars. Together they make up less than one-third of the galaxies. The last group
17. is the irregularly-shaped galaxies, which are non-symmetric, and their pattern is
18. rather chaotic. They account for 3% of the galaxies and their luminosity is
19. quite grainy. The Magellanic Cloud is an example of an irregularly shaped-galaxy.
Where in the passage does the author first identify the group of galaxies that are dimly lit?
1. In the late 1920's, after examining the photographs of the structural appearance
2. of galaxies, Edwin P. Hubble, the American astronomer, classified the galaxies
3. into three distinct groups. These galaxies are comprised of stars that have
4. diverse structure, unequal degree of brightness, and definitely varied sizes
5. One group spirals, is highly luminous and has either a normal or a barred
6. structure. Normal spirals have two arms which radiate from the center of the
7. galaxy to the exterior edges. The two contrasting arms are enclosed in a disk
8. structure made of stars, however, in the barred structure the arms radiate
9. from the top and the bottom of a bright bar that goes through the nucleus of the
10. galaxy. Barred spirals account for nearly 25 percent of all spirals. Over two-
11. thirds of eminent, highly luminous galaxies are Spirals. The Milky Way and
12. The Andromeda are examples of spiral galaxies. Another group referred to as
13. elliptical galaxies exhibits soft, but dim brightness and has two subgroups: The
14. giant and the dwarf. While the giant elliptical galaxies have countless large
15. luminous stars, the dwarf ellipticals have a smaller number of less luminous
16. stars. Together they make up less than one-third of the galaxies. The last group
17. is the irregularly-shaped galaxies, which are non-symmetric, and their pattern is
18. rather chaotic. They account for 3% of the galaxies and their luminosity is
19. quite grainy. The Magellanic Cloud is an example of an irregularly shaped-galaxy.
The passage suggests that the normal structure accounts for
1. In the late 1920's, after examining the photographs of the structural appearance
2. of galaxies, Edwin P. Hubble, the American astronomer, classified the galaxies
3. into three distinct groups. These galaxies are comprised of stars that have
4. diverse structure, unequal degree of brightness, and definitely varied sizes
5. One group spirals, is highly luminous and has either a normal or a barred
6. structure. Normal spirals have two arms which radiate from the center of the
7. galaxy to the exterior edges. The two contrasting arms are enclosed in a disk
8. structure made of stars, however, in the barred structure the arms radiate
9. from the top and the bottom of a bright bar that goes through the nucleus of the
10. galaxy. Barred spirals account for nearly 25 percent of all spirals. Over two-
11. thirds of eminent, highly luminous galaxies are Spirals. The Milky Way and
12. The Andromeda are examples of spiral galaxies. Another group referred to as
13. elliptical galaxies exhibits soft, but dim brightness and has two subgroups: The
14. giant and the dwarf. While the giant elliptical galaxies have countless large
15. luminous stars, the dwarf ellipticals have a smaller number of less luminous
16. stars. Together they make up less than one-third of the galaxies. The last group
17. is the irregularly-shaped galaxies, which are non-symmetric, and their pattern is
18. rather chaotic. They account for 3% of the galaxies and their luminosity is
19. quite grainy. The Magellanic Cloud is an example of an irregularly shaped-galaxy.
The author use the phrase "rather chaotic" in line 18 to indicate that the structure of irregularly-shaped galaxies is
1. In the late 1920's, after examining the photographs of the structural appearance
2. of galaxies, Edwin P. Hubble, the American astronomer, classified the galaxies
3. into three distinct groups. These galaxies are comprised of stars that have
4. diverse structure, unequal degree of brightness, and definitely varied sizes
5. One group spirals, is highly luminous and has either a normal or a barred
6. structure. Normal spirals have two arms which radiate from the center of the
7. galaxy to the exterior edges. The two contrasting arms are enclosed in a disk
8. structure made of stars, however, in the barred structure the arms radiate
9. from the top and the bottom of a bright bar that goes through the nucleus of the
10. galaxy. Barred spirals account for nearly 25 percent of all spirals. Over two-
11. thirds of eminent, highly luminous galaxies are Spirals. The Milky Way and
12. The Andromeda are examples of spiral galaxies. Another group referred to as
13. elliptical galaxies exhibits soft, but dim brightness and has two subgroups: The
14. giant and the dwarf. While the giant elliptical galaxies have countless large
15. luminous stars, the dwarf ellipticals have a smaller number of less luminous
16. stars. Together they make up less than one-third of the galaxies. The last group
17. is the irregularly-shaped galaxies, which are non-symmetric, and their pattern is
18. rather chaotic. They account for 3% of the galaxies and their luminosity is
19. quite grainy. The Magellanic Cloud is an example of an irregularly shaped-galaxy.
In line 7-8, the phrase "enclosed in a disk structure" could best be replaced by which of the following?
1. In the late 1920's, after examining the photographs of the structural appearance
2. of galaxies, Edwin P. Hubble, the American astronomer, classified the galaxies
3. into three distinct groups. These galaxies are comprised of stars that have
4. diverse structure, unequal degree of brightness, and definitely varied sizes
5. One group spirals, is highly luminous and has either a normal or a barred
6. structure. Normal spirals have two arms which radiate from the center of the
7. galaxy to the exterior edges. The two contrasting arms are enclosed in a disk
8. structure made of stars, however, in the barred structure the arms radiate
9. from the top and the bottom of a bright bar that goes through the nucleus of the
10. galaxy. Barred spirals account for nearly 25 percent of all spirals. Over two-
11. thirds of eminent, highly luminous galaxies are Spirals. The Milky Way and
12. The Andromeda are examples of spiral galaxies. Another group referred to as
13. elliptical galaxies exhibits soft, but dim brightness and has two subgroups: The
14. giant and the dwarf. While the giant elliptical galaxies have countless large
15. luminous stars, the dwarf ellipticals have a smaller number of less luminous
16. stars. Together they make up less than one-third of the galaxies. The last group
17. is the irregularly-shaped galaxies, which are non-symmetric, and their pattern is
18. rather chaotic. They account for 3% of the galaxies and their luminosity is
19. quite grainy. The Magellanic Cloud is an example of an irregularly shaped-galaxy.
The word :dim" in line 13 is closest in meaning to which of the following?
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