How have scientists researched proxima centauri?

RESEARCH ON PROXIMA CENTAURI:

Robert Innes discovered proxima centauri which is closest to the Sun in 1915 and it is believed to be 4.85 billion years old. Innes used a blink comparator though later he was in competition with another scientist named, Voute who provided theoretical values pertaining to the star more accurately than Innes. The recent findings found a planet which is located close to the Proxima Centauri making it the closest planet to our Solar System.

Argon, carbon-14, and carbon-12