ASTR 101 Chapter Notes - Chapter Reading: Proxima Centauri B, Space.Com, Exoplanet
Document Summary
Ground based telescopes are more sensitive to mass than kepler, which is sensitive to size. Extreme precision spectrometer (expres), echelle spectrograph for rocky. Exoplanet and stable spectroscopic observations (espresso) - (oct and. Such spectrographs spread starlight out into its array of spectral colors, which contains dark lines at wavelengths where gases in the star"s atmosphere absorb light. These spectra show oscillating doppler effects caused by planetary tugging. High accuracy radial velocity planet searcher (harps) allows us to find smaller planets in wider orbits. The new and improved spectrographs should be able to measure stellar movement as slow as 10 cm/s. Red dwarfs emit most of their light in the infrared. Earth"s atmosphere allows only a narrow range of near-infrared wavelengths to reach the ground. Tess will search our local neighborhood as opposed to kepler"s search of stars between 500 and 1500 light years away (launched on april 16, 2018) Finds planets in the habitable zones of small stars.
