description De Mairan's Nebula Overview
De Mairan's Nebula (Messier 43) is a small H II region located north of the Orion Nebula (M42), from which it is separated by a dark dust lane. First described by Jean-Jacques d'Ortous de Mairan in 1731, it is approximately 1,600 light-years from Earth and part of the larger Orion molecular cloud complex. The nebula is illuminated by the star NU Orionis, which is responsible for ionizing the surrounding hydrogen gas and causing it to glow. It was added to Charles Messier's catalog in 1769, becoming object M43.
help De Mairan's Nebula FAQ
What is De Mairan's Nebula also known as?
De Mairan's Nebula is officially cataloged in the Messier list as Messier 43, or simply M43. It is a small star-forming region located in the constellation of Orion.
Where is De Mairan's Nebula located?
M43 is situated just north of the famous Orion Nebula (Messier 42). Together, they form a massive stellar nursery that is visible to the naked eye under dark skies.
Who discovered De Mairan's Nebula?
The nebula was first described by the French physicist Jean-Jacques d'Ortous de Mairan in 1731. His discovery occurred years before Charles Messier added it to his famous catalog.
What type of nebula is M43?
De Mairan's Nebula is classified as an H II region. This means it is a cloud of gas and plasma where new stars are actively being formed, ionized by the intense ultraviolet light of young stars.
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