Editing Schmidt camera (section)

===Space-based===
A Schmidt telescope was at the heart of the [[Hipparcos]] (1989–1993) satellite from the [[European Space Agency]]. This was used in the Hipparcos Survey which mapped the distances of more than a million stars with unprecedented accuracy: it included 99% of all stars up to [[Apparent magnitude|magnitude]] 11. The spherical mirror used in this telescope was extremely accurate; if scaled up to the size of the [[Atlantic Ocean]], bumps on its surface would be about 10&nbsp;cm high.<ref>{{cite web |url=http://www.esa.int/esaSC/120366_index_0_m.html |title=Hipparcos overview |access-date=2011-03-02 |url-status=live |archive-url=https://web.archive.org/web/20080913205250/http://www.esa.int/esaSC/120366_index_0_m.html |archive-date=2008-09-13 }}</ref>

The [[Kepler photometer]], mounted on NASA's [[Kepler space telescope]] (2009–2018), is the largest Schmidt camera launched into space.