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Comet ISON now in our sky

as we are near the end of this month (Nov) the comet Ison is start to become more clear to the eyes in our sky

start from Nov. 28, 2013 it will round the sun at a distance of just 730,000 miles from it.

If it comes around the sun without breaking up, the comet will be visible in the Northern Hemisphere with the naked eye with particularly bright and beautiful view.

ISON

about ISON:

Comet ISON was first spotted 585 million miles away in September 2012. This is its very first trip around the sun, which means it is still made of pristine matter from the earliest days of the solar system’s formation

 

 

timeline of observations expected of Comet ISON on its perilous journey.

Date Comet ISON Journey
At least a million years ago

 

 

The comet began its journey from the Oort cloud, a swath of icy objects that orbit far beyond Neptune. This is Comet ISON’s first trip through the inner solar system.
September 2012

 

 

Comet ISON was first discovered by Russian astronomers, Vitali Nevski and Artyom Novichonok, using the International Scientific Optical Network in Kislovodsk, Russia.
Jan. 17–18, 2013

 

 

NASA’s Deep Impact acquired images of Comet ISON. The observations were unable to detect whether carbon monoxide or carbon dioxide was present.
January-March 2013

 

 

 

 

 

 

For two months, NASA’s Swift mission observed ISON when it was around 460 million miles away from the sun. Observations showed that ISON was shedding about 112,000 pounds of dust and 130 pounds of water every minute. The lower amount of water represents the fact that the comet was too far away from the sun for its water ice to have begun evaporating. Instead, other materials such as carbon dioxide or carbon monoxide ice were boiling off.
April-May 2013

 

 

 

 

 

 

 

 

 

 

 

NASA’s Hubble Space Telescope observed Comet ISON at 386 million miles away from the sun on April 10, 2013.  Preliminary Hubble observations provided surprising results: The nucleus of the comet appeared to be no larger than 3 to 4 miles across. Since the comet was so bright and so active, scientists had assumed the nucleus was larger. Hubble found the dusty coma, or head of the comet, to be around 3,100 miles across and the tail to be more than 57,000 miles long. HST also observed the comet on May 2 and May 7, and produced an upper limit on how fast the comet was producing carbon monoxide. Hubble also released a movie of the comet from May 8, 2013
June 13, 2013

 

 

NASA’s Spitzer Space Telescope observed Comet ISON at 310 million miles away from the Sun. The data are still being processed and no results have been announced yet.
July-August 2013

 

 

 

 

Sometime in late July or early August, the comet will pass what’s called the frost line, some 230 to 280 million miles away from the sun, when it will feel enough radiation from the sun that water will begin to evaporate and the comet will appear brighter. Some comets have broken up upon crossing the frost line.
August-November 2013

 

 

 

 

Beginning in August, astronomers will be able to observe the comet through ground-based telescopes once again.From early June through late-August, ISON was almost directly behind the sun as viewed from Earth, and thus could not be observed from the ground.
September 2013

 

In September, the comet will be visible near dawn in the Southern Hemisphere with binoculars.
Sept. 17-Oct. 15, 2013  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Launch window for the Balloon Rapid Response for ISON, or BRRISON. This balloon, which with its payload will be 671 feet tall, taller than the Washington Monument, will launch from NASA’s Scientific Balloon Flight Facility in Fort Sumner, N.M. for a single day, carrying a 2.6-foot telescope and other science equipment. It will soar up to 23 miles above Earth’s surface, where it can observe the comet largely unhindered by Earth’s atmosphere.BRRISON will observe ISON in the near-infrared, near-ultraviolet and visible wavelength ranges, and will measure the ratio of carbon dioxide to water emissions from the comet. This ratio will be a vital diagnostic of the comet’s origins. These emissions are blocked by Earth’s atmosphere and cannot be measured from the ground.

BRRISON is an unprecedented quick-reaction project to take advantage of the opportunity presented by the discovery of comet ISON, and is the first NASA Planetary Science Division balloon mission to observe a comet.

October 2013

 

 

 

 

 

 

 

 

 

 

 

Mars Curiosity and Opportunity will have a view of ISON in October, with Oct. 1, 2013, being the comet’s closest approach to Mars.Comet ISON will be close enough to the sun, as of Oct. 10 that it will be visible by an instrument with an extremely wide view on one of the solar observatories: the HI 2 instrument on one of NASA’s Solar Terrestrial Relations Observatories, STEREO-A. At that point the comet will be around 94.5 million miles away from the sun.

Additional Hubble observations are planned to provide new estimates on nucleus size and composition as well as to search for any fragments that have broken off.

November 2013

 

 

 

 

 

 

Observations of Comet ISON with NASA’s Chandra X-ray Observatory will be used to study particles streaming away from the sun in the solar wind. These particles from the sun interact with Comet ISON to generate X-rays that are detected by Chandra. The first of two sets of observations is planned for early November, when Comet ISON will be passing through the hot wind produced by regions along the sun’s equator.
Nov. 16-19 & 21-26, 2013   

 

 

 

 

 

 

Comet ISON will be visible to MESSENGER, which is near Mercury. The closest approach will be on Nov. 19.Once the comet passes Mercury, it will be on the most perilous part of its journey. The intense radiation of the  sun causes material to evaporate quickly off the comet. Moreover the very pressure of the solar particles on the comet can cause it to break up. A slew of space and ground-based telescopes will watch the comet as it makes its slingshot around the sun.
Nov. 18-24, 2013

 

 

 

 

 

 

Launch window for NASA’s FORTIS (short for Far-ultraviolet Off Rowland-Circle for Imaging and Spectroscopy) sounding rocket, which will measure ultraviolet light from Comet ISON as it nears the sun. Such light can help scientists determine the production rate of volatile chemicals leaving the comet surface and also can be used to search for previously undetected types of atoms or molecules on the comet.
Nov. 21-30, 2013

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

As of Nov. 21, Comet ISON will begin to enter the fields of view of NASA’s space-based solar observatories. Comet ISON will be viewed first in what’s called coronagraphs, images that block the brighter view of the sun itself in order to focus on the solar atmosphere, the corona. Such images – from STEREO and the joint European Space Agency/NASA Solar Heliospheric Observatory, or SOHO — will likely be quite visually compelling. NASA’s Solar Dynamics Observatory, or SDO, will view the comet for a few hours around perihelion. SDO’s imagery should be detailed enough to gather information about how the comet evolves through the radiation and pressure of the sun’s atmosphere.All of these observatories will have different views. STEREO-A will be the only one that sees the comet transit across the face of the sun. In SDO’s view, the comet will appear to travel above the sun.

The exact dates of view for these observatories is as follows:

  • Nov 21–28:     STEREO-A HI1 sees comet
  • Nov 26-29:       STEREO-B coronagraphs sees comet
  • Nov 27-30:    SOHO sees comet in coronagraphs
  • Nov 28-29:     STEREO-A coronagraphs sees comet
  • Nov 28:         SDO sees comet (for a few hours)

In addition, ground-based solar telescopes – observing in optical, infrared and radio wavelengths – will all be able to observe the comet during perihelion. Such observations will provide additional information about the composition of the comet and how material evaporates off it, fueling the dusty cloud that surrounds the nucleus.

One last solar effect could impact the comet at this stage in its journey. If the sun coincidentally sends out a giant cloud of solar particles, known as a coronal mass ejection, at the right time and direction to pass the comet, it could pull the comet’s tail right off.

December 2013 – January 2014

 

 

 

 

 

 

 

 

 

If Comet ISON survives its trip around the sun, there’s a good chance that it will be incredibly bright and easily visible with the naked eye in the Northern Hemisphere. In early December, it will be seen in the morning, low on the horizon to the east-southeast. In late December and early January, it will be visible all night long.

A second set of Chandra observations is planned for the middle of December to early January, when ISON will be passing through a transition region in the solar wind, where the hot wind from the Sun’s sun’s equator is mixed with a cooler wind produced by regions near the poles of the sun.

December 26, 2013

 

Closest approach to Earth, just a third of the distance between Earth and the sun, at approximately 28 million miles away.

 

Source: http://www.nasa.gov

End of the world and beyond

a new update to my page (the truth about Islam)
add a (9 Ep) of a great Series talking about End of the world and beyond
I recommended you to watch them if you got a time, it won’t hurt to just watch you know ( ⋂‿⋂’)
so, it’s a scientific Series and it’s really interesting one 2.
here a direct link to the this Series section in my page
End of the world and beyond

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