fluctuations in the size of a star wobbles in the position of a star flickers in the brightness of a star changes in the fuel source of a star
Some space telescopes search for extrasolar planets. The ability to observe which phenomenon is most important for these telescopes' purpose?

Options:
- fluctuations in the size of a star
- wobbles in the position of a star
- flickers in the brightness of a star
- changes in the fuel source of a star

flickers in the brightness of a star