![]() There are four nebulae in Orion's belt the first is the Horsehead, followed by the Flame Nebula, IC-434⁵ and Messier 78⁷. around HD37903 with a radius of about 0,65 light-years. A unique feature of NGC 2023 is the presence of a neutral hydrogen (H2) bubble. The B-type star HD37903, with a surface temperature of 22.000 degrees, is responsible for the excitation of most of the gas and dust within NGC 2023, located in front of the molecular cloud. One of the brightest reflection nebulae in the sky, NGC 2023 lies to the east of the Horsehead Nebula and forms a fine bubble at the edge of the L1630 molecular cloud. The dust consists mainly of carbon, silicon, oxygen and some heavier elements. Interstellar dust reveals its presence by blocking the light from stars or the nebula behind them. The bright blue reflection nebula to the lower right of the Horsehead Nebula is NGC 2023. Infrared surveys have revealed a large population of newborn stars hidden behind the dust and gas of NGC 2024. The bright emission nebula in the lower right is NGC 2024 (the Flame Nebula). The surrounding area also contains many different objects, each with their own uniqueness. The small reddish objects shining through the dust represent Herbig-Haro objects, which glow from material ejected by unseen protostars. On the horse's forehead, a child star partially shrouded in sparkles can be seen. Rising from its misty mother, The Horsehead Nebula is a truly dynamic structure and a fascinating laboratory of complex physics.Īs it expands into the region of the interstellar medium surrounding the nebula, it comes under pressure that leads to the formation of low-mass stars. IC 434, in turn, draws all its power from the bright star Sigma Orionis. The famous Horsehead Nebula represents a dark, non-luminous cloud of dust and gas, its outline obscured by light from IC 434 behind it. Orions are three very bright stars known in popular culture as the Three Marys or the Three Wise Men, but their scientific names are actually Alnitak, Alnilam and Mintaka, and they are observed from November to the end of May. On this occasion we enter the topic of the Belt of Orion, it is nothing more than a group of stars that appear to be arranged in a geometric pattern from Earth. In this type of article it is necessary to describe some frequently used terms in astronomy, which deserve a separate section for a better understanding by the reader. She highlights her work, since she was one of the first women to function properly in the astronomical community, for which she received the Guadalupe Almendaro Medal from the Mexican Astronomical Society. Then, at the age of 30, he devoted himself to analyzing the spectra of stars.ĭuring that time, Stevens discovered 59 gaseous nebulae, as well as variable and nova stars, up to the Horsehead Nebula, earning her the title of curator of the Hardvar Archive of Astrophotography. He was responsible for correcting the system for assigning letters to stars based on the hydrogen content in their spectra. At that time, the technology required for telescopes did not yet exist.Īccording to her biography, the author of the discovery initially worked as an assistant at the Hardwar Observatory, performing mathematical calculations, office work, etc., performing the duties of assistant director of the institution.Įven without any degree in astronomy, she was the author of many celestial discoveries that led to the creation of star catalogues. With less vulnerability and other advantages. This discovery was made at the end of the 1888th century, exactly in XNUMX, when Scottish astronomer Williamina Stevens of the Hardvar College Observatory used a photographic plate consisting of a glass plate covered with a thin photosensitive layer, it quickly found itself on the film market. Its horse-head shape resembles cloud formation in Earth's atmosphere, and it can change its appearance for thousands of light-years. This nebula is part of the Orion Molecular Cloud Complex, and although dark in color, it is visible in exposed contrast due to its location in front of another nebula whose radiation and emission effects are scattered with a reddish tint. The Horsehead Nebula originally identified as Barnard 33, located in the constellation Orion, about 1.600 light-years from Earth, is a very dark, cold cloud of gas, 3,5 light-years across, first appeared in 1919 American literature and literature by astronomer Edward Emerson.
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