A History of the Orion Neblua

This nebula is a kind of cosmic dust, showing bright and colorful spots in the sky. The Orion nebula has come back millions of years ago and consists mainly of hydrogen, helium, carbon, nitrogen, and oxygen (Wiley 1). The Orion nebula is also known as M42, Messier 42, NGC 1976 (Ivan P. 1). There may be a huge black hole in the middle of the Orion sea cloud, but the Orion sea cloud is still the brightest nebula. It can be seen with the naked eye at some point of the year and has three brightest stars.

Interest in Orion is currently at an enthusiastic level and astronomers are always interested in Orion because they are only 450 seconds (1,500 light years) away from the earth. The angle of the Orion seen from the ground telescope is twice the full moon, about 1 degree. Known as bread, Orion has the most unique and easy-to-find star pattern in the same spiral arm of the Milky Way same as the sun. Orion was named after a hunter of Greek mythology. The above picture shows Rigel's distinctive blue / white color and cool red superstar Betelgeuse. In the center of the nebula is a set of four stars called trapezoid. The most brightest star in the trapezoid, Theta 1 Orionis C, is a very hot 39,000 Kelvin. This is the most source of ultraviolet rays and shines the nebula. The lower left is a 4 star in the lower left corner of the photo.

Star formation is spreading now near the Orion nebula. The stars were formed with the Orion belt 8 million years ago and the trapezoid two million years ago. Well, the original star (young star) is formed by Kleinmann Low Nebula, and in the future the dense core outside the K - L Nebula will collapse. Looking at the various stars in the Orion constellation, I am really looking back. The stars are reproduced by a chain reaction. In a simplified cycle, a young hot star blows outward, then the expanding gas compresses the dense nuclei of the molecular cloud and collapses these nuclei to form a new young hot star. This cycle is repeated throughout the molecular cloud that forms a nursery at a fixed star. Everything is invisible to the human eye.

Last week, we visited most of Orion, the protagonist of the hunter (read here). This time we will focus on his grand sword, one of the real astronomy in winter. The sword hangs under Orion's unique 3-star belt. Eye without help usually can detect 3 lights in Orion's sword but binoculars and telescopes quickly the middle object is not at all a star, but a bright shining gas and star called Orion Nebula (Or Big Nebula) is in Orion or Messier 42, also called M42. For best viewing experiences, when the moon rises or leaves the sky, choose overnight - just like next week!