UPSC Exam > UPSC Questions > What type of stars make up about 90 percent o...
Start Learning for Free
What type of stars make up about 90 percent of the stars in the universe?
- a)Red Giants
- b)T Tauri Stars
- c)Red Dwarfs
- d)Red Supergiants
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
What type of stars make up about 90 percent of the stars in the univer...
Red Dwarfs make up about 90 percent of the stars in the Milky Way and the universe. They are relatively faint and small compared to other types of stars.
View all questions of this test
Most Upvoted Answer
What type of stars make up about 90 percent of the stars in the univer...
Red Dwarfs make up about 90 percent of the stars in the universe.
- Red Dwarfs: Red Dwarfs are the most common type of star in the universe and are also known as M-type stars. They are relatively small and cool, with a mass that is less than half that of the Sun. Due to their small size and low mass, they have a low luminosity and emit most of their radiation in the infrared part of the electromagnetic spectrum. Red Dwarfs have a long lifespan, with some estimated to live for trillions of years.
- Abundance: Red Dwarfs are abundant in the universe, making up about 90 percent of all stars. They are found in all types of galaxies, from small dwarf galaxies to large spiral galaxies. Their abundance is due to the fact that they are long-lived and have a low mass, allowing them to form and exist for a longer period of time compared to other types of stars.
- Characteristics: Red Dwarfs have a relatively low surface temperature, ranging from about 2,200 to 3,500 Kelvin. This low temperature gives them a reddish appearance, hence the name "Red Dwarfs." They have a small size, typically less than half the size of the Sun, and a low luminosity. Their energy is generated through the fusion of hydrogen in their cores, but at a much slower rate compared to larger stars.
- Importance: Red Dwarfs are important in the study of exoplanets and the search for extraterrestrial life. Due to their long lifespan, they provide stable environments for orbiting planets to potentially develop life. The habitable zone around a Red Dwarf, where conditions may be suitable for liquid water to exist, is closer to the star compared to the habitable zone around a star like the Sun. This makes Red Dwarfs prime targets for the search for potentially habitable exoplanets.
In conclusion, Red Dwarfs are the most common type of star in the universe, making up about 90 percent of all stars. They are small, cool, and long-lived, and their abundance has significant implications for our understanding of the universe and the search for life beyond Earth.
- Red Dwarfs: Red Dwarfs are the most common type of star in the universe and are also known as M-type stars. They are relatively small and cool, with a mass that is less than half that of the Sun. Due to their small size and low mass, they have a low luminosity and emit most of their radiation in the infrared part of the electromagnetic spectrum. Red Dwarfs have a long lifespan, with some estimated to live for trillions of years.
- Abundance: Red Dwarfs are abundant in the universe, making up about 90 percent of all stars. They are found in all types of galaxies, from small dwarf galaxies to large spiral galaxies. Their abundance is due to the fact that they are long-lived and have a low mass, allowing them to form and exist for a longer period of time compared to other types of stars.
- Characteristics: Red Dwarfs have a relatively low surface temperature, ranging from about 2,200 to 3,500 Kelvin. This low temperature gives them a reddish appearance, hence the name "Red Dwarfs." They have a small size, typically less than half the size of the Sun, and a low luminosity. Their energy is generated through the fusion of hydrogen in their cores, but at a much slower rate compared to larger stars.
- Importance: Red Dwarfs are important in the study of exoplanets and the search for extraterrestrial life. Due to their long lifespan, they provide stable environments for orbiting planets to potentially develop life. The habitable zone around a Red Dwarf, where conditions may be suitable for liquid water to exist, is closer to the star compared to the habitable zone around a star like the Sun. This makes Red Dwarfs prime targets for the search for potentially habitable exoplanets.
In conclusion, Red Dwarfs are the most common type of star in the universe, making up about 90 percent of all stars. They are small, cool, and long-lived, and their abundance has significant implications for our understanding of the universe and the search for life beyond Earth.
|
Explore Courses for UPSC exam
|
|
Similar UPSC Doubts
Top Courses for UPSCView all
What type of stars make up about 90 percent of the stars in the universe?a)Red Giantsb)T Tauri Starsc)Red Dwarfsd)Red SupergiantsCorrect answer is option 'C'. Can you explain this answer?
Question Description
What type of stars make up about 90 percent of the stars in the universe?a)Red Giantsb)T Tauri Starsc)Red Dwarfsd)Red SupergiantsCorrect answer is option 'C'. 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 What type of stars make up about 90 percent of the stars in the universe?a)Red Giantsb)T Tauri Starsc)Red Dwarfsd)Red SupergiantsCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What type of stars make up about 90 percent of the stars in the universe?a)Red Giantsb)T Tauri Starsc)Red Dwarfsd)Red SupergiantsCorrect answer is option 'C'. Can you explain this answer?.
What type of stars make up about 90 percent of the stars in the universe?a)Red Giantsb)T Tauri Starsc)Red Dwarfsd)Red SupergiantsCorrect answer is option 'C'. 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 What type of stars make up about 90 percent of the stars in the universe?a)Red Giantsb)T Tauri Starsc)Red Dwarfsd)Red SupergiantsCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What type of stars make up about 90 percent of the stars in the universe?a)Red Giantsb)T Tauri Starsc)Red Dwarfsd)Red SupergiantsCorrect answer is option 'C'. Can you explain this answer?.
Solutions for What type of stars make up about 90 percent of the stars in the universe?a)Red Giantsb)T Tauri Starsc)Red Dwarfsd)Red SupergiantsCorrect answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for UPSC.
Download more important topics, notes, lectures and mock test series for UPSC Exam by signing up for free.
Here you can find the meaning of What type of stars make up about 90 percent of the stars in the universe?a)Red Giantsb)T Tauri Starsc)Red Dwarfsd)Red SupergiantsCorrect answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
What type of stars make up about 90 percent of the stars in the universe?a)Red Giantsb)T Tauri Starsc)Red Dwarfsd)Red SupergiantsCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for What type of stars make up about 90 percent of the stars in the universe?a)Red Giantsb)T Tauri Starsc)Red Dwarfsd)Red SupergiantsCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of What type of stars make up about 90 percent of the stars in the universe?a)Red Giantsb)T Tauri Starsc)Red Dwarfsd)Red SupergiantsCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice What type of stars make up about 90 percent of the stars in the universe?a)Red Giantsb)T Tauri Starsc)Red Dwarfsd)Red SupergiantsCorrect answer is option 'C'. Can you explain this answer? tests, examples and also practice UPSC tests.
|
|
Explore Courses for UPSC exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup