Thierry Legault

He then joined the Association des utilisateurs de détecteurs electroniques (l'AUDE), which aims to develop astronomical observation based on electronic detectors.

In 1994, along with Christian Buil, he participated in a mission at the Pic du Midi Observatory on the collision of comet Shoemaker-Levy 9 with Jupiter and launched himself into planetary photography.

[1][2] His photographs of the deep sky, the planets, the Moon and the Sun (eclipses and HA images) are published in numerous astronomical journals.

[5][6] The International Astronomical Union gave its name to (19458 Legault) (1998 HE8), an asteroid of the main belt discovered in 1998 by Michel Bœuf.

In 1999, the Société astronomique de France awarded him the Marius Jacquemetton Prize, which rewards "a remarkable astronomical work in the field of popularization as well as in the practice of amateur astronomy".