A new observatory in space, TESS! Time for an update to the Space Observatories page. Also some delays and the Chinese "Two Meter Space Telescope" got the proper name Xuntian, "Sky Survey", and will be deployed close to the future multiple segment Chinese Space Station for easy maintenance.
The source data are now available on my space exploration history github repository, together with the included infographics.[Edit: Corrected image 2018-04-25]