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How far from earth is the Cassiopeia A supernova remnant?


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2009-05-03 16:18:01
2009-05-03 16:18:01

Approximately 11,000 light years. [See Link]


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No, only a large star can become a supernova; the earth is far too small for a supernova happen.

The closest supernova that ever exploded was 290 light years from earth

Cassiopeia is a constellation consisting of many stars. It's impossible to give a distance.

Only a very, very few stars have mass enough to become supernova. Jupiter is a planet not a star. It is far to small to become a star, let alone a supernova.

There are huge spaces between stars. The biggest threat to Earth would be the gamma radiation emitted, which could sterilize the Earth from as far as 10 light-years away.

That depends entirely on how far the supernova is from Earth. If it is our Sun going supernova, a little over 8 minutes. And a few Milli-seconds later all life on Earth would be gone. Any other star, it would just appear slightly brighter for a while and then disappear. It could take centuries for the light to reach us.

outside the solar system at least, probably a few light years away

It all depends on how explosive the supernova was and how far it was from us. Generally a supernova looses it's "amazing" brightness over a period of a week.

Scientifically, the end of the world is possible when the sun uses up all of it's hydrogen and creates a supernova. The Earth might get caught in the supernova, and the Earth will be too hot for any organisms to survive. +++ Almost. The Sun won't end as a supernova because it is far too small. Instead it will probably become a red giant, swelling possibly enough to engulf the Earth in its atmosphere. Everything combustible will be burnt, and the all water will evaporate.

There is no star with that name. Many stars have names that start with "Epsilon", followed by the genitive of a constellation, e.g. "Epsilon Cruxis", "Epsilon Geminorum", etc. If its epsilon segin cassiopeia, it is 520L/Y(light years) away from earth.

A supernova is far more powerful than the sun. A supernova releases more energy in a single second than the sun will in its entire 10 billion years of existence.

No. Some time in the next million years Betelgeuse will explode as a supernova, but it is too far away from us to damage the earth. All we will see is Betelgeuse getting a lot brighter in the night sky.

Hardly any - they are very far away. However, a supernova (which would come before a neutron star) could have catastrophic effects on Earth, if it were to happen in our neighborhood (up to a few thousand light years!).

We're right in the middle of it. And so is everything else in the universe.

If our sun were to go nova it definitely would affect Earth. Science estimates that if any star closer than 30 lightyears away were to become a supernova it would have a definite effect on the Earth from x-rays and other radiation.

It could. it depends on the condidtion. Yes it could but after the sun goes supernova it has a chance of turning into a black hole.

SN 2006gy [See Link] was an extremely energetic supernova that was discovered on September 18, 2006. Although about one hundred times as luminous as SN 1987A, which was bright enough to be seen by the naked eye, SN 2006gy was more than 1,400 times as far away as SN 1987A, and too far away to be seen without a telescope.SN1987A [See Link]was a supernova in the outskirts of the Tarantula Nebula. It could be seen with the naked eye from the Southern Hemisphere.It was the closest observed supernova since SN 1604 The light from the supernova reached Earth on February 23, 1987.SN1604 [See Link] was seen on October 9th, 1604 generally a supernova occurs once every fifty years but the universe has been in a drought for these supernatural awesome events

Cassiopeia contains all kinds of stars, some close to us, some far off. They are all grouped in an area of the sky when seen from Earth, but seen from somewhere else they could look quite different and they might not be grouped together. So every constellation contains all sorts of stars.

Yes. Sirius actually consists of two stars. The main object, Sirius A is not only bigger than Earth but is almost twice the diameter of the sun. The secondary star, Sirius B is a collapsed remnant of a star called a white dwarf. It is slightly smaller than Earth but far denser.

Yes. If nobody survived, then we wouldn't be around today to talk about it. There wasn't much of anything to survive anyway. As seen from Earth, the 1604 supernova appeared about as bright as some of the planets in our solar system; definitely bright enough to be seen, but too far away to pose any sort of threat to us.

As far as we can tell - very little. It might have already exploded as a supernova.

Cassiopeia contains all kinds of stars, some close to us, some far off. They are all grouped in an area of the sky when seen from Earth, but seen from somewhere else they could look quite different and they might not be grouped together. So every constellation contains all sorts of stars.

Who in the world arranges the sentence structure in these questions? I am totally baffled as to the poor word arrangement. Wow!!!!!!!!

"Distance" means how far two object are from one another. In this case, how far the Moon is from Earth, or how far the Sun is from Earth.

Any constellation is a group of stars that appear to form some kind of pattern, but have no connection with each other. They all happen to be in roughly the same direction from us, but they're all at different distances. So there's no such thing as a constellation's distance from us.

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