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Which of the following statements in correct?
- Galaxies generally contain between 106 and 1012 stars.
- Nebula is a cloud of gas and dust floating in space.
- Saros period is of 18 years and 11.3 days during which the Sun, Earth and Moon return to almost the same relative positions.
- Geodesy refers to the study of the shape and the gravitational field of the Earth upon data collected from artificial satellites.
- a)I and II
- b)I, II, III and IV
- c)II and III
- d)I and IV
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Which of the following statements in correct? Galaxies generally conta...
1
Galaxies are categorized according to their visual
morphology
as
elliptical
,
spiral
, or
irregular
.
Many galaxies are thought to have
supermassive black holes
at their centers. The Milky Way's central black hole, known as
Sagittarius A*
, has a mass four million times greater than the
Sun
.
As of March 2016,
GN-z11
is the oldest and most distant galaxy observed. It has a
comoving distance
of 32 billion
light-years
from
Earth
, and is seen as it existed just 400 million years after the
Big Bang
.
In 2021, data from NASA's
New Horizons
space probe was used to revise the previous estimate of 2 trillion galaxies down to roughly 200 billion galaxies (2
). This followed a 2016 estimate that there were two trillion (�
10112
) or more galaxies in the �
1012observable universe
, overall, as many as an estimated 1
stars�
1024]
(more stars than all the grains of sand
on planet Earth
). Most of the galaxies are 1,000 to 100,000 parsecs
in diameter (approximately 3,000 to 300,000 light years
) and are separated by distances on the order of millions of parsecs (or megaparsecs). For comparison, the Milky Way has a diameter of at least 30,000 parsecs (100,000 ly) and is separated from the Andromeda Galaxy
, its nearest large neighbor, by 780,000 parsecs (2.5 million .2
A nebula is
an enormous cloud of dust and gas occupying the space between stars and acting as a nursery for new stars. The roots of the word come from Latin nebula, which means a “mist, vapor, fog, smoke, exhalation.” Nebulae are made up of dust, basic elements such as hydrogen and other ionized gases.
3.
The saros is a period of exactly 223 synodic months, approximately 6585.3211 days, or 18 years, 10, 11, or 12 days, and 8 hours, that can be used to predict eclipses of the Sun and Moon.
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Most Upvoted Answer
Which of the following statements in correct? Galaxies generally conta...
1
Galaxies are categorized according to their visual
morphology
as
elliptical
,
spiral
, or
irregular
.
Many galaxies are thought to have
supermassive black holes
at their centers. The Milky Way's central black hole, known as
Sagittarius A*
, has a mass four million times greater than the
Sun
.
As of March 2016,
GN-z11
is the oldest and most distant galaxy observed. It has a
comoving distance
of 32 billion
light-years
from
Earth
, and is seen as it existed just 400 million years after the
Big Bang
.
In 2021, data from NASA's
New Horizons
space probe was used to revise the previous estimate of 2 trillion galaxies down to roughly 200 billion galaxies (2
). This followed a 2016 estimate that there were two trillion (�
10112
) or more galaxies in the �
1012observable universe
, overall, as many as an estimated 1
stars�
1024]
(more stars than all the grains of sand
on planet Earth
). Most of the galaxies are 1,000 to 100,000 parsecs
in diameter (approximately 3,000 to 300,000 light years
) and are separated by distances on the order of millions of parsecs (or megaparsecs). For comparison, the Milky Way has a diameter of at least 30,000 parsecs (100,000 ly) and is separated from the Andromeda Galaxy
, its nearest large neighbor, by 780,000 parsecs (2.5 million .2
A nebula is
an enormous cloud of dust and gas occupying the space between stars and acting as a nursery for new stars. The roots of the word come from Latin nebula, which means a “mist, vapor, fog, smoke, exhalation.” Nebulae are made up of dust, basic elements such as hydrogen and other ionized gases.
3.
The saros is a period of exactly 223 synodic months, approximately 6585.3211 days, or 18 years, 10, 11, or 12 days, and 8 hours, that can be used to predict eclipses of the Sun and Moon.
Community Answer
Which of the following statements in correct? Galaxies generally conta...
Explanation:
The correct answer is option 'B' - I, II, III, and IV.
I. Galaxies generally contain between 106 and 1012 stars.
- This statement is correct. A galaxy is a vast system of stars, gas, dust, and other celestial objects bound together by gravity. Galaxies can vary in size, but they typically contain between 106 (1 million) and 1012 (1 trillion) stars.
II. Nebula is a cloud of gas and dust floating in space.
- This statement is also correct. A nebula is a vast cloud of gas and dust in space. Nebulas are often the birthplaces of stars, as the gas and dust within them can collapse under gravity to form new stellar systems.
III. Saros period is of 18 years and 11.3 days during which the Sun, Earth, and Moon return to almost the same relative positions.
- This statement is correct. The Saros period refers to the approximately 18-year and 11.3-day cycle in which the Sun, Earth, and Moon align in a similar configuration. This period is significant for predicting and studying eclipses, as eclipses tend to occur in predictable patterns known as eclipse cycles.
IV. Geodesy refers to the study of the shape and the gravitational field of the Earth upon data collected from artificial satellites.
- This statement is also correct. Geodesy is the scientific discipline that deals with the measurement and representation of the Earth's shape, gravitational field, and geodynamic phenomena. It involves the collection of data from various sources, including artificial satellites, to accurately determine the Earth's dimensions and gravitational forces.
Therefore, all four statements are correct, and the correct answer is option 'B' - I, II, III, and IV.
The correct answer is option 'B' - I, II, III, and IV.
I. Galaxies generally contain between 106 and 1012 stars.
- This statement is correct. A galaxy is a vast system of stars, gas, dust, and other celestial objects bound together by gravity. Galaxies can vary in size, but they typically contain between 106 (1 million) and 1012 (1 trillion) stars.
II. Nebula is a cloud of gas and dust floating in space.
- This statement is also correct. A nebula is a vast cloud of gas and dust in space. Nebulas are often the birthplaces of stars, as the gas and dust within them can collapse under gravity to form new stellar systems.
III. Saros period is of 18 years and 11.3 days during which the Sun, Earth, and Moon return to almost the same relative positions.
- This statement is correct. The Saros period refers to the approximately 18-year and 11.3-day cycle in which the Sun, Earth, and Moon align in a similar configuration. This period is significant for predicting and studying eclipses, as eclipses tend to occur in predictable patterns known as eclipse cycles.
IV. Geodesy refers to the study of the shape and the gravitational field of the Earth upon data collected from artificial satellites.
- This statement is also correct. Geodesy is the scientific discipline that deals with the measurement and representation of the Earth's shape, gravitational field, and geodynamic phenomena. It involves the collection of data from various sources, including artificial satellites, to accurately determine the Earth's dimensions and gravitational forces.
Therefore, all four statements are correct, and the correct answer is option 'B' - I, II, III, and IV.
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Which of the following statements in correct? Galaxies generally contain between 106 and 1012 stars. Nebula is a cloud of gas and dust floating in space. Saros period is of 18 years and 11.3 days during which the Sun, Earth and Moon return to almost the same relative positions. Geodesy refers to the study of the shape and the gravitational field of the Earth upon data collected from artificial satellites.a)I and IIb)I, II, III and IVc)II and IIId)I and IVCorrect answer is option 'B'. Can you explain this answer?
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Which of the following statements in correct? Galaxies generally contain between 106 and 1012 stars. Nebula is a cloud of gas and dust floating in space. Saros period is of 18 years and 11.3 days during which the Sun, Earth and Moon return to almost the same relative positions. Geodesy refers to the study of the shape and the gravitational field of the Earth upon data collected from artificial satellites.a)I and IIb)I, II, III and IVc)II and IIId)I and IVCorrect answer is option 'B'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Which of the following statements in correct? Galaxies generally contain between 106 and 1012 stars. Nebula is a cloud of gas and dust floating in space. Saros period is of 18 years and 11.3 days during which the Sun, Earth and Moon return to almost the same relative positions. Geodesy refers to the study of the shape and the gravitational field of the Earth upon data collected from artificial satellites.a)I and IIb)I, II, III and IVc)II and IIId)I and IVCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements in correct? Galaxies generally contain between 106 and 1012 stars. Nebula is a cloud of gas and dust floating in space. Saros period is of 18 years and 11.3 days during which the Sun, Earth and Moon return to almost the same relative positions. Geodesy refers to the study of the shape and the gravitational field of the Earth upon data collected from artificial satellites.a)I and IIb)I, II, III and IVc)II and IIId)I and IVCorrect answer is option 'B'. Can you explain this answer?.
Which of the following statements in correct? Galaxies generally contain between 106 and 1012 stars. Nebula is a cloud of gas and dust floating in space. Saros period is of 18 years and 11.3 days during which the Sun, Earth and Moon return to almost the same relative positions. Geodesy refers to the study of the shape and the gravitational field of the Earth upon data collected from artificial satellites.a)I and IIb)I, II, III and IVc)II and IIId)I and IVCorrect answer is option 'B'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Which of the following statements in correct? Galaxies generally contain between 106 and 1012 stars. Nebula is a cloud of gas and dust floating in space. Saros period is of 18 years and 11.3 days during which the Sun, Earth and Moon return to almost the same relative positions. Geodesy refers to the study of the shape and the gravitational field of the Earth upon data collected from artificial satellites.a)I and IIb)I, II, III and IVc)II and IIId)I and IVCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements in correct? Galaxies generally contain between 106 and 1012 stars. Nebula is a cloud of gas and dust floating in space. Saros period is of 18 years and 11.3 days during which the Sun, Earth and Moon return to almost the same relative positions. Geodesy refers to the study of the shape and the gravitational field of the Earth upon data collected from artificial satellites.a)I and IIb)I, II, III and IVc)II and IIId)I and IVCorrect answer is option 'B'. Can you explain this answer?.
Solutions for Which of the following statements in correct? Galaxies generally contain between 106 and 1012 stars. Nebula is a cloud of gas and dust floating in space. Saros period is of 18 years and 11.3 days during which the Sun, Earth and Moon return to almost the same relative positions. Geodesy refers to the study of the shape and the gravitational field of the Earth upon data collected from artificial satellites.a)I and IIb)I, II, III and IVc)II and IIId)I and IVCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for UPSC.
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Which of the following statements in correct? Galaxies generally contain between 106 and 1012 stars. Nebula is a cloud of gas and dust floating in space. Saros period is of 18 years and 11.3 days during which the Sun, Earth and Moon return to almost the same relative positions. Geodesy refers to the study of the shape and the gravitational field of the Earth upon data collected from artificial satellites.a)I and IIb)I, II, III and IVc)II and IIId)I and IVCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for Which of the following statements in correct? Galaxies generally contain between 106 and 1012 stars. Nebula is a cloud of gas and dust floating in space. Saros period is of 18 years and 11.3 days during which the Sun, Earth and Moon return to almost the same relative positions. Geodesy refers to the study of the shape and the gravitational field of the Earth upon data collected from artificial satellites.a)I and IIb)I, II, III and IVc)II and IIId)I and IVCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of Which of the following statements in correct? Galaxies generally contain between 106 and 1012 stars. Nebula is a cloud of gas and dust floating in space. Saros period is of 18 years and 11.3 days during which the Sun, Earth and Moon return to almost the same relative positions. Geodesy refers to the study of the shape and the gravitational field of the Earth upon data collected from artificial satellites.a)I and IIb)I, II, III and IVc)II and IIId)I and IVCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Which of the following statements in correct? Galaxies generally contain between 106 and 1012 stars. Nebula is a cloud of gas and dust floating in space. Saros period is of 18 years and 11.3 days during which the Sun, Earth and Moon return to almost the same relative positions. Geodesy refers to the study of the shape and the gravitational field of the Earth upon data collected from artificial satellites.a)I and IIb)I, II, III and IVc)II and IIId)I and IVCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice UPSC tests.
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