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How mass of the black hole candidate Cygnus x-1 has been estimated?
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What are some examples of stars that have already turned into black holes?
Cygnus X-1; Sagittarius A* Actually, any observed black hole can be assumed to have been a star at some moment; although in the case of the supermassive black holes, it is not quite clear how they formed.
Why have black dwarfs not been seen?
It is estimated that it would take trillions of years for a white dwarf to cool to a black dwarf, which is more than the current age of universe. So black dwarfs do not exist yet.
Who was the first person to see a black hole?
No black hole has ever been seen by anyone. The nature of a black hole actually prevents it from being seen. A black hole is the ultimate gravity well, and nothing that crosses the event horizon can escape. Not even light can get out. The only way a black hole can be "seen" is indirectly as it creates what is called gravity lensing. Light from objects "behnid" the black hole is "bent" around it, and it is this phenomenon that allows a black hole to be "seen" by observers.
How many super-massive black holes are known?
There was one about 10:30 last night, right after the news. None has been discovered today, but it's still early.
What percentage of the universes history has earth been around?
The age of the Solar System is estimated to be about 4.568 billion years; Earth is almost as old - estimated at 4.54 billion years. The age of the Universe is estimated to be about 13.798 billion years. Thus, the ratio is about 33%.
What makes Cygnus X-1 a good black-hole candidate?
Cygnus x-1, which is found within the Swan Cygnus constellation, is a binary star system and one of the brightest sources of x-rays in the sky. Data collected from this system indicates that there is a compact "object" that is 9 solar masses. As well, its brightness has been observed to be continually changing, which is a characteristic of a blackhole, and simply cannot be otherwise explained.
What are some examples of stars that have already turned into black holes?
Cygnus X-1; Sagittarius A* Actually, any observed black hole can be assumed to have been a star at some moment; although in the case of the supermassive black holes, it is not quite clear how they formed.
What is the population of bears?
The overall population of black bears in the United States has been estimated to range between 339,000 and 465,000.
Why have black dwarfs not been seen?
It is estimated that it would take trillions of years for a white dwarf to cool to a black dwarf, which is more than the current age of universe. So black dwarfs do not exist yet.
What year did Shirley Chisholm became the first black president?
yes
What was estimated population of Babylonia?
The total population of Babylon at the time of Nebuchadnezzar has been estimated to have been up to 200000.
What is the estimated population of Babylonia?
The total population of Babylon at the time of Nebuchadnezzar has been estimated to have been up to 200000.
Is the black footed ferret an endangered animal in BC?
The black footed ferret is an endangered animal wherever it is found, and captive breeding programs have been successful in restoring them in the wild, where an estimated 2500 now roam.
What are some features of the black swan?
The Black swan (Cygnus atratus) is a species of swan which is native to Australia. It has also been introduced to New Zealand.The Black swan is mostly black, apart from a deep orange-red beak with a paler tip, and white tips on its wings which are visible in flight.It ranges in size from 120 cm to 142 cm, with an average of around 131 cm. Its wingspan is around 2m.
I am pregnant and been sick and it has black spots in it is this normal?
Old blood clots with severe bleeding signifies abruptio placenta.Consult doctor immediately. You might be candidate for c-section.
Is a black swan?
The Black swan (Cygnus atratus) is a species of swan which is native to Australia. It has also been introduced to New Zealand.The Black swan is mostly black, apart from a deep orange-red beak with a paler tip, and white tips on its wings which are visible in flight. Although it is the avian emblem of Western Australia, it is found throughout Australia, except for Cape York Peninsula.More information on the Black swan can be found at the related link below.
Who was the first person to see a black hole?
No black hole has ever been seen by anyone. The nature of a black hole actually prevents it from being seen. A black hole is the ultimate gravity well, and nothing that crosses the event horizon can escape. Not even light can get out. The only way a black hole can be "seen" is indirectly as it creates what is called gravity lensing. Light from objects "behnid" the black hole is "bent" around it, and it is this phenomenon that allows a black hole to be "seen" by observers.
