4
$\begingroup$

I would like to know please whether or not the TESS telescope will be much better than the Kepler one.

Thanks.

$\endgroup$
  • $\begingroup$ Rather than one being better than the other, I would say that they have different targets. Whereas Kepler focused on a specific area of the sky, TESS will cover an area 350 times bigger. Also, most of the exoplanets discovered by Kepler are far away; TESS will focus on stars within 300 light years away. For more info, feel free to watch this video I recently made: youtube.com/… $\endgroup$ – The Exoplanets Channel Apr 14 '18 at 21:49
  • $\begingroup$ Looking up NASA fact sheets for TESS and Kepler, the literature ( jpl.nasa.gov/news/press_kits/Kepler-presskit-2-19-smfile.pdf) says that Kepler could detect brightness changes down to 20 parts per million. For perspective they say that an Earth-like planet orbiting a sun-like star (I assume at an Earth-like orbit) creates a brightness change of 84 ppm. By contrast, the one I found for TESS (tess.gsfc.nasa.gov/documents/TESS_FactSheet_Oct2014.pdf) claims 200 ppm with a system noise ratio of 60 ppm. I'm not calling this an answer since I may be misinterpreting. $\endgroup$ – Jack R. Woods Apr 20 '18 at 3:49
4
$\begingroup$

Rather than one being better than the other, I would say that they have different targets.

Whereas Kepler focused on a specific area of the sky, TESS will cover an area 350 times bigger.

Also, most of the exoplanets discovered by Kepler are far away; TESS will focus on stars within 300 light years away.

For more info, feel free to watch this video I recently made: https://www.youtube.com/watch?list=PL3RiFKfZj3pv1ZqpFxuZinoGtUGEOankw&v=7bsxlG-rh1E

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy