What are the different methods used to discover exoplanets?

What are the different methods used to discover exoplanets?

There are several methods to discover exoplanets, including the transit method, radial velocity method, direct imaging, and gravitational microlensing. Each method has its own advantages and limitations.

Can you explain the transit method in more detail?

Sure! The transit method involves monitoring a star's brightness over time. When a planet passes in front of the star, it causes a temporary dip in brightness, indicating the presence of the planet.

What about the radial velocity method?

The radial velocity method detects variations in a star's velocity due to the gravitational pull of an orbiting planet. This is measured through shifts in the star's spectral lines.

Are there any other methods worth mentioning?

Yes, direct imaging captures images of exoplanets by blocking out the star's light, and gravitational microlensing observes the bending of light from distant stars caused by a planet's gravity.