Posted on 03/15/2006 11:29:27 AM PST by Excuse_My_Bellicosity
Magnetic forces at the center of the galaxy have twisted a nebula into the shape of DNA, a new study reveals.
The double helix shape is commonly seen inside living organisms, but this is the first time it has been observed in the cosmos.
"Nobody has ever seen anything like that before in the cosmic realm," said the study's lead author Mark Morris of UCLA. "Most nebulae are either spiral galaxies full of stars or formless amorphous conglomerations of dust and gasspace weather. What we see indicates a high degree of order."
These observations, made with NASA's Spitzer Space Telescope, are detailed in the March 16 issue of the journal Nature.
Disk-driven shape
The DNA nebula is about 80 light-years long. It's about 300 light-years from the supermassive black hole at the center of the Milky Way. The nebula is nearly perpendicular to the black hole, moving out of the galaxy at a quick clipabout 620 miles per second (1,000 kilometers per second).
Magnetic field lines at the galactic center are about 1,000 times stronger than on Earth. They run perpendicular to the black hole, but parallel through the nebula. Scientists think that twisting of these lines is what causes the double helix shape.
While the black hole might be the first culprit to come to mind, it's more likely that the magnetic field lines are anchored to a giant gas disk that orbits the black hole several light-years away, researchers say.
It's like having two strands of rope connected to a fixed point, Morris said. As you spin the strands, they braid around each other in a double helix fashion. In this case the gas and dust of the nebula makes up the strands.
"It's as if there's a bar across the middle [of the black hole], or a dumbbell shape, where the strands are anchored, and as it spins around, it twists the strands together," Morris told SPACE.com.
This process takes a long time, though, since the disk completes one orbit around the black hole roughly every 10,000 years. But that's an important number. "Once every 10,000 years is exactly what we need to explain the twisting of the magnetic field lines that we see in the double helix nebula," Morris said.
The recipe
The recipe for a DNA nebula is strict but simple. It requires a strong magnetic field, a rotating body, and a nebulous cloud of material positioned just right.
Massive central black holes are the best sources for both the strong magnetic field and rotating body, and since most large galaxies have them, Morris expects DNA-like nebula may be common through out the universe.
"I absolutely expect to see [this configuration] in gas-rich galaxies with all these elements in place," Morris said.
However, these nebulas are tough to spot, and current technology limits scientists' observations to our galaxy.
So that must mean its a really really big space monster huh ?
"'Nobody has ever seen anything like that before in the cosmic realm,' said the study's lead author Mark Morris of UCLA. 'Most nebulae are either spiral galaxies full of stars or formless amorphous conglomerations of dust and gasspace weather. What we see indicates a high degree of order.'. . .. . . The recipe for a DNA nebula is strict but simple. It requires a strong magnetic field, a rotating body, and a nebulous cloud of material positioned just right."
Magnetic fields created by a Birkeland Current... and it is not the first time. For example:
The jets of Herbig-Haro stars and active galaxies are often resolved into braided filaments.
The Cygnus Loop (the blue strand in the picture below) is a twined braid.
The faint Galactic Jetemanating from the center of M82 is a double spiral. (which is probably what this "DNA Nebula" actually is for our Galaxy)
How does the gravity driven Cosmology of current theory explain this strange structure? It really can't. So they propose a "strong magnetic field" but really haven't a clue about how it is created in the electrically neutral model of space that is the currently accepted paradigm.
Astronomers are willing to accept a "strong magnetic field" but for some reason choose to ignore what we KNOW creates magnetic fields... rotating electrical currents. This artifact of one is only a mere 80 LIGHT YEARS in length... and somehow retains its cohesive shape. What can do that?
How about a force that is 1039 times stronger than gravity?
(That's 1,000,000,000,000,000,000,000,000,000,000,000,000,000 more powerful than gravity)
I think this might be another "win" for the Electric Universe Cosmologists.
I think they meant "Axially oriented above the spiral disk of the Milky Way Galaxy."
Am I the only one that wonders why our home Galaxy is named after a candy bar? ;^)
Yep. For all his moping, Marvin's really awesome. (So is everyone in the Guide :D) I love that book!
~Moshi-chan
Actually, I think the candy bar was named after the galaxy... but hey. Maybe our galaxy is just huuuuuuuge candy bar? >:D
Excuse my silliness, please.. I am very tired right now, lol.
~moshi-chan
Mark for later reading.
Any chance that the Electric Universe Cosmologists might put their minds into finding a way to tap into that electro-magnetic energy?
It's hugh!
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