Christmas Cards

• 2023 : This year's card is based on a paper that I published recently on the effect of solar flares on the integrated spectrum of the Sun. Here I observe the Sun as if it was another star that we could not resolve.
• 2022 : This year's card has a picture of my PhD thesis, along with a famous observation of the Sun with coronal holes that look like a happy face.
• 2021 : This year's card has a picture of the Sun during the eruption of a massive solar flare that I have worked with for my last project. The green lines are the solar spectrum showing the light that is emitted by the Sun from around 300 to 900 nanometers, which spans the visual light and parts of the Infrared and Ultraviolet spectrum. In red are some specific spectral features that we study. Finally, the Swedish 1-m Solar Telescope is depicted below, this is the telescope that I am working with.
• 2020 : This year's card is based on a paper that I published recently on measuring magnetic fields on the Sun.
• 2019 : This years card depicts the European Solar Telescope (EST), a large telescope for observing the sun with a 4 meter opening. Hopefully this telescope will be constructed in the near future once enough European countries are on board to fund this 200 million project. Once built it will be much better than any currently existing solar telescope, and will help us to further our understanding of the Sun.
• 2018 : The Sun during a coronal mass ejection shaped as Santa. A large CME can contain a billion tons of matter that can be accelerated to several million kilometres per hour in a spectacular explosion.
• 2017 : A Christmas tree shaped sunspot and the Swedish 1-m Solar Telescope
• 2016 : An artistic relresentation of a Chop-Nod reduction as is used in Mid-IR observations to remove the bright sky background and be able to see stars.
• 2015 : A telescope direct imaging an exoplanet with a Christmas tree shaped lens. The image is a real simulation of how a star with a planet would look through a Christmas tree shaped lens.
• 2014 : Curved space-time caused by a very heavy gift.
• 2013 : A Christmas tree depicted by the path of a photon that is being Compton scattered. The color of the right side is slightly different from the left, to show the change in energy/wavelength.
• 2012 : A telescope looking at the Moon, showing us a diffraction limited PSF shaped as a Christmas tree.
• 2011 : Young's double-slit experiment, but with Christmas trees.
• 2010 : A Christmas tree but as a fractal.
• 2009 : Santa but with Pi and a bad (ho)^3 gag.