出典:Wikipedia
出典:『Wikipedia』 (2011/03/24 11:51 UTC 版)
ESPRESSO (Echelle SPectrograph for Rocky Exoplanet- and Stable Spectroscopic Observations) is a new-generation, high-resolution, fiber-fed and cross-dispersed echelle spectrograph (R = 140’000) for the visible wavelength range (350 nm – 720 nm), for ESO's VLT. Its main feature is the spectroscopic stability and the radial velocity precision. With incredible 'spectroscopic' precision, it will be able to detect Earth-like planets. For example, our Earth induces a radial-velocity variation of 9 cm/s on our Sun.