Download Learnerz IAS app from the Play Store now! Download



Dragon’s Egg Nebula UPSC NOTE

 Why in News

  • The nebula NGC 6164/6165, also known as the Dragon’s Egg, a cloud of gas and dust surrounding a pair of stars called HD 148937, taken with the VLT Survey Telescope hosted at the European Southern Observatory’s Paranal Observatory in Cerro Paranal, Chile, have presented a puzzle to astronomers

  • One of the two large stars residing inside Dragon's Egg has a magnetic field, as does our sun. Its companion does not. 

  • And such massive stars are not usually associated with nebulae.

  • Relatively few massive stars that are magnetic got that way because of stellar fratricide

  • In this case, the bigger star apparently gobbled up a smaller sibling star, and the mixing of their stellar material during this hostile takeover created a magnetic field

  • These two stars - gravitationally bound to each other in what is called a binary system - are located in our Milky Way galaxy about 3,700 light-years from Earth in the constellation Norma. 

    • A light-year is the distance light travels in a year, 5.9 trillion miles (9.5 trillion km).

  • The magnetic star is about 30 times more massive than the sun and its remaining companion is about 26.5 times more massive than the sun

  • They orbit at a distance from each other varying from seven to 60 times the distance between Earth and the sun.

  • The Dragon's Egg is so named because it is located relatively near a larger nebula complex called the Fighting Dragons of Ara

  • The stars inside the Dragon's Egg appear to have started out 4-6 million years ago as a triple system - three stars born at the same time and gravitationally bound.

  • The triple system's two innermost members included a larger star - perhaps 25 to 30 times the mass of the sun - and a smaller one - maybe five to 10 times the sun's mass.

  • The more massive one evolved more quickly than the other, with its outer layer engulfing the smaller star and triggering a merger that ejected into space the gas and dust that make up the nebula

  • This occurred very recently in a cosmic time scale - about 7,500 years ago, based on the expansion velocity of the material in the nebula. 

  • It consists of mostly hydrogen and helium, but also an unusually large amount of nitrogen, after the merger

  • About 7% of massive stars are known to have a magnetic field. 

  • Stellar magnetic fields store immense amounts of energy. 

  • The sun's magnetic storms can interact with Earth's atmosphere and create our planet's thrilling auroras, but also can disrupt radio signals and navigation systems.



Amritsar,1,April 2024,301,Art & Culture,1,August 2023,251,Courses,7,Daily Current Affairs,48,December 2023,189,Disaster Management,2,Environment and Ecology,54,February 2024,228,Foundation Course,1,GDP,1,GEMS Club,1,GEMS Plus,1,Geography,67,Govt Schemes,2,GST,1,History,2,Home,3,IAS Booklist,1,Important News,71,Indian Economy,46,Indian History,2,Indian Polity,56,International Organisation,12,International Relations,58,Invasive Plant,1,January 2024,240,July 2023,281,June 2022,6,June 2023,268,March 2024,238,May 2022,17,May 2024,233,Mentorship,2,November 2023,169,October 2023,203,Places in News,2,Science & Technology,66,September 2023,205,UPSC CSE,111,
Learnerz IAS | Concept oriented UPSC Classes in Malayalam: Dragon’s Egg Nebula UPSC NOTE
Dragon’s Egg Nebula UPSC NOTE
Learnerz IAS | Concept oriented UPSC Classes in Malayalam
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS PREMIUM CONTENT IS LOCKED STEP 1: Share to a social network STEP 2: Click the link on your social network Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy Table of Content