Me at ParanalI'm Roger Wesson, an astronomer working at University College London, where I carry out research on evolved stars and their outflows as part of the sndust group. Previously I spent four years in Chile, where I was a Fellow at the European Southern Observatory and spent 80 nights a year supporting operations at the Very Large Telescope, including nighttime support on UT3 (Melipal). Before that I was at UCL, where I was an undergraduate, postgraduate and postdoc. These pages contain information about my research.

What is Betelgeuse doing?

Everyone's favourite supernova progenitor started fading dramatically in November 2019 and is now less than half as bright as it was. Here is a plot of its last 5 years of observations, from the AAVSO:

It looks like it has just begun to brighten again as of late February. I would like there to be a galactic supernova in my lifetime (the last one was in 1604) so I'm rooting for it to explode as soon as possible.


My most recent 5 publications:

See the full list of 135 papers on my publications page, research highlights on my research page, and where in the sky I've been looking on my sky map page


Some of the codes I've written:

See more on my codes page.


I do a lot of astrophotography when I find myself in places with dark skies, and I am an ESO photo ambassador. More details on my photography page.

180 degree panorama of the Milky Way over Paranal


By a depressingly significant margin, the most popular part of of my website is still CMBR, a game I made in 2014 based on the wildly popular (at the time) 2048. I also made an absurd joke sequel, CMBR2, which is the second most popular part of my website.