The Doppler method allows astronomers detect planets around other stars by observing what?
a. the light from the planet that is moving towards the star
b. the light from the planet that is orbiting around the center of mass
c. the light from the star that is wobbling around the center of mass
d. the light from the star that is moving away from the planet
Ans.
The correct option is (D) since astronomers measure the wavelength shifts by analysing the light from star which is moving towards the earth or away from the earth (or any planet). Hence option (A) is incorrect. since planet does not have its own light, option (B) is incorrect.
I hope the answer is clear to you, in case you have any query, please feel free to ask. If you are satisfied with the answer, please give a thumbs up. Your support is valuable. Thank You
The Doppler method allows astronomers detect planets around other stars by observing what? a. the light...
Warm Up One of the most reliable ways to detect planets orbiting other stars is to look for regular dips in the stars apparent magnitude (brightness). KIC 3558849 is a star of roughly the EPIC 26103150, Ko-11.782 Lst 90009 same mass and radius as our Sun Dips are observed in its brightness every 1322 days. How far away from. 100 the center of KIC 3558849 is this 0 9980 planet orbiting?
Warm Up One of the most reliable ways to...
What is the evidence that planets orbit other stars? (Check all that apply.) a. Planetary nebulae surrounding the remnants of stars. b. Doppler shifts in a star’s spectrum due to the very small motion of the star as it and the planet orbit their center of mass. c. Decrease in the brightness of a star during planetary transit. d. Brief magnification of a distant star’s brightness due to gravitational lensing as the planet passes between Earth and the star.
How can astronomers use the Doppler Effect to detect the presence of an exoplanet around a star? Try to be as clear as possible about what is measured and how that is interpreted. .
Explore the discovery of planets around other stars. What methods did the astronomers use? What measurements did they take? How did they use Kepler
The Doppler method allows us to find a planet's semimajor axis using just the orbital period and the star's mass (Mathematical Insight Finding Orbital Distances for Extrasolar Planets). a) Imagine that a new planet is discovered orbiting a 2 MSun star with a period of 9 days . What is its semimajor axis? Express your answer using three significant figure. (m) b) Another planet is discovered orbiting a 0.7 MSun star with a period of 100 days. What is its...
Over 500 planets have so far been detected beyond our solar system. This is accomplished by looking for the effect the planet has on the star. The star is not truly stationary; instead, it and its planets orbit around the center of mass of the system. Astronomers can measure this wobble in the position of a star. a.) For a star with the mass and size of our sun and having a planet with two times the mass of Jupiter,...
Two planets are orbiting around the same star. Planet A has four times the mass of planet B. Planet A is located twice further from the star than planet B. When comparing the force of gravity affecting both planets, what is the value of the following ratio: FG on A FG on B O A) 4 B) 2 C) 1 D) 1/2 O E) 1/4
1. Which object (planet or star) takes
a greater amount of time to complete one orbit? Explain.
a. If the extrasolar
planet is orbiting counterclockwise, what direction does the star
orbit, clockwise or counterclockwise?
b. Which letter, A, B,
or C indicates the center of mass of the system?
c. At a certain instant
of time, how does the direction the extrasolar planet is orbiting
compare to the direction the star is orbiting?
d. In Figure...
In recent years, scientists have discovered hundreds of planets orbiting other stars. Some of these planets are in orbits that are similar to that of earth, which orbits the sun (Msun = 1.99 × 1030 kg) at a distance of 1.50 × 1011 m, called 1 astronomical unit (1 au). Others have extreme orbits that are much different from anything in our solar system. The following problem relates to one of these planets that follows circular orbit around its star....
11. Astronomers observing a distant galaxy detect light from the Lyman a transition (n = 2 → n = 1 in hydrogen) at a frequency of 2.25 x 1015 Hz. Estimate how far away the galaxy is. (You may take the Hubble constant to be 70kms- Mpc) A supernova causes a sudden brightening of the galaxy, which lasts for forty days as seen from Earth. How long did it last in the rest-frame of the galaxy?
11. Astronomers observing a...