The methods that astronomers have used to detect extrasolar planets are:
What are the methods that astronomers have used to detect extrasolar planets ?
The astronomers used the Directly observing the extrasolar planet around its parent star for them to be able to detect extrasolar planets.
They also used Measuring the Doppler shift of the light from a star to see how they scatters.
CHECK THE COMPLETE QUESTION BELOW:
Which of the following methods have astronomers used to detect extrasolar planets
1.) Measuring the Doppler shift of the light from a star to see how the star "wobbles" due to the gravity of the planet
2. Directly observing the extrasolar planet around its parent star
3.) Observing the transit of an extrasolar planet across its star by measuring the decrease in light received from the star
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