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Rubin-LSST France Profile picture
Rubin-LSST France
@LSST_France
Participation française à l'Observatoire Vera C. Rubin et au Legacy Survey of Space and Time (https://t.co/qObBvAZWP6)
Sep 18, 2019 • 68 tweets • 60 min read
With the upcoming transfer of the @LSST filter exchange system to @SLAClab, learn each day on @LSST_France why and how this key element of the telescope has been built by @IN2P3_CNRS

📷 © Cyril Frésillon/LSST/CNRS Photothèque Image Let’s start with the basics. Why does @LSST need a filter exchange system? 🤔

To measure the redshift of galaxies (and thus know how far they are), one usually performs a spectroscopic analysis.