synonymSpiral nebula(Virgo galaxy component) generally refers to the Eye of God (Aquarius object)
The eye of God is the spiral nebula,NGC 7293Nebula.[1]Helix Nebula spiral nebula distanceearth650 light years, located in the constellation Aquarius.This nebula has long been listed asNGC 7293This is a typical type of planetary nebula. Planetary stars are actually formed from the remains of stars, just like our sun.[2]
The blue pupils and white eyes are surrounded by flesh colored eyelids, which are very similar to the eyes, but the "Eye of God" is actually vast, and it takes five to six years for the light it emits to go from one side to the other.This star is actually composed ofaquariusA crust of gas and dust blown by a dim star in the center.
“NGC 7293”The spiral nebula is about 700 light-years away from Earth.Because of its high brightness, it was recognized by French astronomers as early as 1780Charles Messier Yes, it was named“M77”Because it was the 77th visible nebula discovered at that time.Although the name of this nebula was later changed according to the new naming rule, it is still the key goal of scientists for more than 200 years.Since 1999, with the development of ultraviolet radiationSpectroscopeExploration satellite(FUSE) and other advancedDetection toolScientists have gained more and deeper understanding of this mysterious nebula.The far ultraviolet spectroscope detection satellite is 18 feet high and weighs 300 pounds. Its orbit is 500 miles from the ground.It has four single functionSpace telescopeThe ultra short wave rays from the Hubble Space Telescope can be analyzed.Since its launch, the far ultraviolet spectroscope detection satellite has collected data of about 2000 different starsMarylandJohn HopkinsPhysics Laboratorybe responsible for.From November 29 to December 1, 2001, the far ultraviolet spectroscope detection satellite once detected the bulge at the center of the "NGC 7293" spiral nebula and collected a lot of data.Through the study of these data, scientists found that if the whole nebula is compared to aeggThen the convex part in the center is equivalent toyolkThe surrounding part is equivalent to egg white.And the detection results of the nebula centerGalactic centerThe detection results of are basically consistent.By aSun like starThe Helix Nebula, generated at the end of life, is the closest to people on EarthPlanetary nebula。 The outer gas shell of this star was thrown into space. Seen from the position of the earth, it is just like looking into a spiral ladder.And destined to becomeWhite dwarfThe remains of the core of the star, emitting very high energy radiation, causing the previously ejected cloud to emit fluorescence.
This nebula has an internal disk with a diameter of 8 ′ 19 ″ (0.52Second gap）An outer bulge with a diameter of 12 ′ 22 ″ (0.77 seconds difference) and an outermost ring with a diameter of 25 ′ (1.76 seconds difference)Interstellar matterOne side is flat after collision.Estimate thisPlanetary nebulaThe inner ring has expanded for 6500 years, and the outer ring has expanded for 12100 years, with expansion rates of 40 km/s and 32 km/s.The main ring contains many dim nodes, which are observed in many close planetary nebulae.
Related anecdotes
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After the movie The Lord of the Rings trilogy became popular all over the world, it was called the Eye of Soren on the Internet.
Discovery History
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The spiral nebula wasKarl Ludwig Harding Discovery.At that time, nebulae like this were often mistaken for giant gas planets because they were very similar to gas planets.650 light-years from Earth, located ataquariusIn the constellation.This nebula has been included in the catalog for a long time, and its number is NGC 7293. It is a very typical type of planetary nebula. Planetary stars are actually formed from the debris of stars, just like our sun.
News report
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In February 2009,EuropeAstronomers recently took photos from the vast space“Cosmic eye”And called it the "Eye of God".
The "Eye of God" is located 700 light years away from the earthAquariusIn fact, amateurAstronomerIt can be vaguely seen through a small telescope. They call it Helix Nebula, covering an area of the sky about one quarter of a full moon.This rare and spectacular picture is set up byChileLashiraEuropean Southern ObservatoryIt was taken by a giant telescope.The picture is so clear that we can even see the distance in the central "eye"Galaxy。
External cloud
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According to the Hubble Space Telescope, there are dark red clouds around the Eye of God.It may be the initial eruption of the dead star.
