An exoplanet collision

An exoplanet collision

An exoplanet collision How did a team of amateur astronomers become co-authors of an internationally renowned scientific publication? 2SPOT An association of amateur astronomers   2SPOT[1] is a public-interest scientific association created in 2019 by five...
Demetra tutorial

Demetra tutorial

Demetra tutorial You’ll find all our Demetra video tutorials on this web page. Demetra is a free software package for processing spectra from the ALPY 600, LISA and eShel spectrographs from the Shelyak Instruments range. Download Demetra software Playlist of...
How to measure the redshift of a galaxy ?

How to measure the redshift of a galaxy ?

How to measure the redshift of a galaxy ? Recommanded equipment : Alpy, Lisa, Star Analyser Time : 1 to 4 h Low resolution spectroscopes are particularly well suited to the study of distant galaxies such as Seyfert galaxies or Quasars. We can easily calculate their...