The Nucleus
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| Originally published | 2008 |
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| ID | 2271800 |
About The Nucleus
Although our understanding of the structure and activities of the cell nucleus and of the nanomachines which it contains is increasing rapidly, much remains to be learned. . . .
Gap-free human genome sequence completed for first time
... Tour de forceMost of the newly added DNA coding sit in the dense middle sections of each chromosome - the neat bundles of tightly coiled DNA found in The Nucleus of almost every cell in our body - as well as the protective caps or ends, called telomeres...
The war on Terror ever?
... with the idea that they are completely excluded from the country, which became The Nucleus for al-Qaeda in Iraq, and then the core IS...
Acclaimed scientist gets brain surgery for alcohol addiction
... The DBS surgery, performed to Frank Plummer targets the brain, The Nucleus accumbens, or pleasure center patients are awake for the surgery...
Abu Bakr al-Baghdadi: What his death means for IS in Syria
... The Nucleus of IS activity in Syria is the greater region of Deir al-Zour in the north-east, particularly the areas extending south of Bosaira towards Diban...
Has found an other interstellar visitors?
... But further observations detected no signs of a coma, the fuzzy envelope around The Nucleus of the comet...
Has found an other interstellar visitors?
Work of art: The Comet has a very eccentric orbit
An amateur astronomer has discovered a comet that could, from outside our Solar System .
If so, it would be the second inter-stellar Object after the elongated body is known, has been identified as a 'Oumuamua, in the year 2017.
The Minor Planet Center (MPC) at Harvard University
The Body is a "hyperbolic" orbit, which would seem to indicate, whose origin is in another planetary system.
A hyperbolic orbit is an eccentric, where The Shape deviates significantly from a Perfect Circle .
A Perfect Circle has an eccentricity of 0. The elliptical orbit of many planets, asteroids and comets, the eccentricities between 0 and 1 have Railways.
The newly discovered Object - first of all, the name gb00234, but now known as The Comet C/2019 Q4 (Borisov ) - has an eccentricity of 3. 2, based on the current observations.
It was noticed by the amateur astronomer Gennady Borisov on August 30 at the Crimean Observatory in Bakhchysarai. At the time, about three astronomical units (450 million km) from The Sun .
'Oumuamua, discovered in the 19th century. October 2017, was initially classified as a comet, based on its hyperbolic orbit. But further observations detected no signs of a coma, the fuzzy envelope around The Nucleus of The Comet . C/2019 Q4 (Borisov ), on The Other hand, is clearly an active comet, with a visible coma and tail.
in contrast to the small, weak 'Oumuamua, the new Object seems to be very large - approximately 20 km wide and bright.
In addition, 'Oumuamua was also spotted that you had after its closest approach to The Sun (perihelion), so it was not visible long enough for astronomers to answer the many questions. C/2019 Q4 (Borisov ), meanwhile, is still our sun is approaching the system and will not reach perihelion until 10 December.
The Minor Planet Center announcement to make to the astronomers follow-up observations. According to the MPC, "absent an unexpected fade or disintegration, [C/2019 Q4] should be visible for at least a year".
This would be for an observer is an exciting opportunity to shape the properties of an Object that could be created around a Distant Star .
astrophysicist: "in contrast to" Oumuamua, the asteroids-or comets-nature is still debated, this is definitely a comet.
"If it is clearly interstellar, it will be fascinating to see how its composition (spectral properties) in comparison to the variety that we see in comets from our Solar System . "
astrophysicist Simon Porter, from the Southwest Research Institute (SwRI) in San Antonio , Texas, has been who of the tracked Object , "With such a bright coma, we should be able to get beautiful spectra of Q4 and, hopefully, measure isotope ratios. "
isotopes are different forms of the same chemical element. He added that the conditions could be different from those of the "locals" of The Comet .
follow Paul
astronomy, comets
Source of news: bbc.com