Ciekawa zbieżność : kończy się misja Keplara , a zaczyna TESS.
Warto w tym miejscu zwrócić jeszcze uwagę na różnice między nimi.
The Hunt for New Worlds Continues with TESS(...) TESS will look at nearly the entire sky (about 85%) over two years. The mission divides the sky into 26 sectors. TESS will look at 13 of them in the southern sky during its first year before scanning the northern sky the year after. (...)
What makes TESS different from the other planet-hunting missions that have come before it? The Kepler mission (yellow) looked continually
at one small patch of sky, spotting dim stars and their planets that are
between 300 and 3,000 light-years away. TESS (blue)
will look at almost the whole sky in sections, finding bright stars and their planets that are
between 30 and 300 light-years away.
https://nasa.tumblr.com/post/172895813794/the-hunt-for-new-worlds-continues-with-tessSpaceX poised to launch planet-hunterApril 16, 2018 William Harwood
(...) By the end of its initial two-year mission, TESS will have measured starlight across 85 percent of the sky. And unlike Kepler, the new observatory is optimized to study light from the most common stars in the galaxy, reddish M dwarfs that are smaller and cooler than Earth’s sun.
“I think it’s fair to say that the CCDs that TESS is flying are the most perfect CCDs that have ever been flown on any science mission, NASA or otherwise,” said George Ricker, TESS principal investigator at the Massachusetts Institute of Technology. “We’re very sensitive to cool stars. It turns out that the majority of the stars in the Milky Way are cool stars that have a temperature about half that of the sun. (...)
https://spaceflightnow.com/2018/04/16/spacex-poised-to-launch-planet-hunter/