Stellar Physics
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![](https://www.epfl.ch/research/domains/astrophysics/wp-content/uploads/2022/06/star-forming-region.jpg)
Research methods in stellar physics
![This Hubble image shows RS Puppis, a type of variable star known as a Cepheid variable. As variable stars go, Cepheids have comparatively long periods — RS Puppis, for example, varies in brightness by almost a factor of five every 40 or so days. RS Puppis is unusual; this variable star is shrouded by thick, dark clouds of dust enabling a phenomenon known as a light echo to be shown with stunning clarity. These Hubble observations show the ethereal object embedded in its dusty environment, set against a dark sky filled with background galaxies.](https://www.epfl.ch/research/domains/astrophysics/wp-content/uploads/2022/07/heic1323a-384x216.jpg)
Stellar Variability
Understanding pulsating stars through observations and theory
Stellar Spectroscopy
Measuring high-precision radial velocities of classical Cepheids