Light pillars Description: It’s always a bit surprising to see these columns of light appear out of nowhere, most often in winter. They are caused by the refraction of moonlight, or simply bright lighting (near ski resorts for example) through very fine...
Noctilucent cloud Description: A noctilucent cloud forms in the mesosphere at about 75 to 90 kilometers altitude, compared to a maximum of 12 km for common clouds. These are ice crystals that form around nuclei of dust or water vapor released by space launchers. In...
Supernova SN 2020ifo in galaxy M61 Description: On May 6, 2020, a supernova appeared in the galaxy Messier 61 in the constellation Virgo. This is the eighth supernova to be discovered in this galaxy since 1926. This supernova results from the collapse of a supergiant...
The Perséid meteors from 2018 Description: Meteors (or shooting stars) are small pieces of dust generally left by the passage of a comet which gradually disintegrates with each passage close to the Sun. The Earth in its movement along its orbit crosses the same piles...
The Sun on December 8, 2022 Description: Here is a good comparison of what can be observed on the sun through different filters. The bottom left photo shows the sun in natural colors with the use of a solar filter that reduces the brightness by 99.999% without...
