CHARA research is focused on studying the astrophysical properties of stars at high angular resolution using long-baseline optical/infrared interferometry. The Center operates the CHARA Array, a six-telescope optical/infrared interferometric array on Mount Wilson, California. The CHARA Array provides the highest resolution of any telescope at visible and near-infrared wavelengths making it among the most powerful facilities in the world for studying stars and stellar systems at resolutions not previously available. Among the Array's "firsts" are:

* First direct detection of gravity darkening on a single star  (Regulus)

* First direct measurement of the "P-factor" in the Baade-Wesselink method (δ Cep)

* First detection of hot exozodiacal dust around a main-sequence star (Vega)

* First model-independent measurement of an exoplanet diameter (HD 189733b)

* First angular diameter for a halo population star (μ Cas)

* First image of a single, main-sequence star (Altair)

* First direct image of an interacting binary (β Lyr)

* Shortest-period (1.14 days) binary star system yet resolved (σ2 CrB)

* First image of a binary star system in eclipse (ε Aur)


See Science Highlights for an overview of the science topics being investigated at the CHARA Array.