Astronomy NASAWatch on CGTN Talking About TESS By Keith Cowing NASA Watch April 17, 2018 Filed under exoplanet, TESS, video Keith Cowing NASA Watch founder, Explorers Club Fellow, ex-NASA, Away Teams, Journalist, Space & Astrobiology, Lapsed climber. 2 responses to “NASAWatch on CGTN Talking About TESS” RocketScientist327 says: April 17, 2018 at 8:02 pm 0 0 Looking good Keith and nice job. Spot on… “Because we can”. Saturn1300 says: April 18, 2018 at 1:15 pm 0 0 Enjoyed all the video about TESS. Here is a little writing about some details from Wiki. TESS’s two-year all-sky survey will focus on nearby G, K, and M type stars with apparent magnitudes brighter than magnitude 12. Approximately 500,000 stars will be studied, including the 1,000 closest red dwarfs across the whole sky, an area 400 times larger than that covered by the Kepler mission. TESS is expected to discover more than 20,000 transiting exoplanets, including 500 to 1000 Earth sized planets and Super-Earths. Of those discoveries, an estimated twenty could be super-Earths located in the habitable zone around a star.The survey is broken up into 26 observation sectors, each sector being 24° × 96°, with an overlap of sectors at the ecliptic poles to allow for additional sensitivity toward smaller and longer-period exoplanets in that region of the celestial sphere. The spacecraft will spend two 13.7 day orbits observing each sector, mapping the southern hemisphere of sky in its first year of operation and the northern hemisphere in its second year. The cameras actually take images every 2 seconds, but all the raw images would represent much more data volume than can be stored or downlinked: so, cutouts around 15,000 selected stars (per orbit) will be coadded to 2-minute cadence and saved on-board for downlink, while full-frame images will also be coadded to 30-minute cadence and saved for downlink. The actual data downlinks will occur every 13.7 days near perigee. TESS survey continuous viewing time: Standard areas, 27 days. Overlapping viewing areas: 54 days, 81 days, 181 days, and 351 days at the ecliptic poles including the JWST continuous viewing zones27 days will have a lot of short period planets, but the overlapping areas might find a twin of our Sun system.