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The term "exoplanet" refers to a planet that orbits a star outside our solar system. Which of the following methods is commonly used to detect exoplanets?
- a)Direct imaging of the planet's surface
- b)Measuring the Doppler shift in the star's spectrum
- c)Observing the planet's magnetic field
- d)Detecting the planet's atmospheric composition
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
The term "exoplanet" refers to a planet that orbits a star o...
Understanding Exoplanet Detection
Exoplanets are celestial bodies that orbit stars outside our solar system. Detecting these planets is crucial for understanding their characteristics and potential habitability. One of the most effective methods for detecting exoplanets is through the measurement of the Doppler shift in a star's spectrum.
How the Doppler Shift Works
- The Doppler effect refers to the change in frequency or wavelength of light from an object moving relative to an observer.
- When a planet orbits a star, its gravitational pull causes the star to wobble slightly. This motion affects the light emitted by the star.
Detecting the Shift
- As the star moves toward us, its light shifts towards the blue end of the spectrum (blue shift).
- Conversely, as it moves away, the light shifts toward the red end (red shift).
- By measuring these shifts, astronomers can infer the presence of a planet and estimate its mass and orbit.
Advantages of the Doppler Method
- It can detect even small planets if they induce a significant wobble in their host star.
- This method has led to the discovery of many exoplanets, especially in the earlier stages of exoplanet research.
Conclusion
While other methods such as direct imaging, atmospheric composition analysis, and magnetic field detection exist, measuring the Doppler shift remains one of the most reliable and widely used techniques for discovering exoplanets. It provides valuable insights into planetary systems beyond our own.
Exoplanets are celestial bodies that orbit stars outside our solar system. Detecting these planets is crucial for understanding their characteristics and potential habitability. One of the most effective methods for detecting exoplanets is through the measurement of the Doppler shift in a star's spectrum.
How the Doppler Shift Works
- The Doppler effect refers to the change in frequency or wavelength of light from an object moving relative to an observer.
- When a planet orbits a star, its gravitational pull causes the star to wobble slightly. This motion affects the light emitted by the star.
Detecting the Shift
- As the star moves toward us, its light shifts towards the blue end of the spectrum (blue shift).
- Conversely, as it moves away, the light shifts toward the red end (red shift).
- By measuring these shifts, astronomers can infer the presence of a planet and estimate its mass and orbit.
Advantages of the Doppler Method
- It can detect even small planets if they induce a significant wobble in their host star.
- This method has led to the discovery of many exoplanets, especially in the earlier stages of exoplanet research.
Conclusion
While other methods such as direct imaging, atmospheric composition analysis, and magnetic field detection exist, measuring the Doppler shift remains one of the most reliable and widely used techniques for discovering exoplanets. It provides valuable insights into planetary systems beyond our own.
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Community Answer
The term "exoplanet" refers to a planet that orbits a star o...
The most common method for detecting exoplanets is the radial velocity method, which involves measuring the Doppler shift in a star’s spectrum caused by the gravitational tug of an orbiting planet. This shift indicates the star’s wobble, revealing the presence of an exoplanet.
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The term "exoplanet" refers to a planet that orbits a star outside our solar system. Which of the following methods is commonly used to detect exoplanets?a)Direct imaging of the planets surfaceb) Measuring the Doppler shift in the stars spectrumc) Observing the planets magnetic fieldd) Detecting the planets atmospheric compositionCorrect answer is option 'B'. Can you explain this answer? for UPSC 2026 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about The term "exoplanet" refers to a planet that orbits a star outside our solar system. Which of the following methods is commonly used to detect exoplanets?a)Direct imaging of the planets surfaceb) Measuring the Doppler shift in the stars spectrumc) Observing the planets magnetic fieldd) Detecting the planets atmospheric compositionCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The term "exoplanet" refers to a planet that orbits a star outside our solar system. Which of the following methods is commonly used to detect exoplanets?a)Direct imaging of the planets surfaceb) Measuring the Doppler shift in the stars spectrumc) Observing the planets magnetic fieldd) Detecting the planets atmospheric compositionCorrect answer is option 'B'. Can you explain this answer?.
The term "exoplanet" refers to a planet that orbits a star outside our solar system. Which of the following methods is commonly used to detect exoplanets?a)Direct imaging of the planets surfaceb) Measuring the Doppler shift in the stars spectrumc) Observing the planets magnetic fieldd) Detecting the planets atmospheric compositionCorrect answer is option 'B'. Can you explain this answer? for UPSC 2026 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about The term "exoplanet" refers to a planet that orbits a star outside our solar system. Which of the following methods is commonly used to detect exoplanets?a)Direct imaging of the planets surfaceb) Measuring the Doppler shift in the stars spectrumc) Observing the planets magnetic fieldd) Detecting the planets atmospheric compositionCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The term "exoplanet" refers to a planet that orbits a star outside our solar system. Which of the following methods is commonly used to detect exoplanets?a)Direct imaging of the planets surfaceb) Measuring the Doppler shift in the stars spectrumc) Observing the planets magnetic fieldd) Detecting the planets atmospheric compositionCorrect answer is option 'B'. Can you explain this answer?.
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