What crucial piece of information does the transit method *not* provide directly, requiring follow-up observation?

Answer

The planet's mass.

The transit method provides size and period, but it does not directly yield the planet's mass; mass determination usually requires follow-up using the radial velocity method.

What crucial piece of information does the transit method *not* provide directly, requiring follow-up observation?

#Videos

Searching for Exoplanets: The Transit Method - YouTube

astronomyexoplanetsdetectiontransit methodSpace Observation