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How many light years away does a Supernova have to be to destroy Earth?
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How far is the closest star to earth?
The closest supernova, or more correctly supernova remnant, is the Vela supernova remnant [See Link] in the constellation Vela. The "guest" star exploded about 11 - 12,000 years ago and is located around 800 light years from Earth.
Grab nebula was first seen on earth in 1054 how long did it take to get here?
Supernova(SN) 1054 Crab Supernova was first seen in 1054, it is estimated to be 6,500 light years away, so 6,500 years
Is Betelgeuse going to destroy earth?
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.
A supernova explosion was observed on earth in 1987 but the explosion actually took place about 16900 years ago how is this possible?
The speed of light is about 300,000 kilometers per second (186,000 miles per second). So by the time you even got past typing the first letter of this question, you, the Earth and everything else you know would be obliterated. It would have taken approximately one-sixth of a second for the light from the supernova to reach Earth.
How far away is the crab nebula?
The Crab Nebula is within the Milky Way galaxy, but about 2000 parsecs away from Earth, or about 6300 light years. It is still expanding from the initial supernova (observed in 1054 AD) and is currently about 11 light-years in diameter.
IF the crab nebula is 6300 light years from earth how long did take the light from the supernova to reach earth?
6,300 years
How far from a supernova do you have to be to be safe?
About 50 to 100 light-years as the closest safe distance between Earth and a supernova. But, if a supernova to go off within about 30 light-years of us, that would lead to major effects on the Earth, possibly mass extinctions.
How far is the closest star to earth?
The closest supernova, or more correctly supernova remnant, is the Vela supernova remnant [See Link] in the constellation Vela. The "guest" star exploded about 11 - 12,000 years ago and is located around 800 light years from Earth.
How long would it take for us to know about a star that goes supernova from 500 light years away?
The light of the explosion wouldn't arrive at the Earth for 500 years.
Grab nebula was first seen on earth in 1054 how long did it take to get here?
Supernova(SN) 1054 Crab Supernova was first seen in 1054, it is estimated to be 6,500 light years away, so 6,500 years
Is there a star about to destroy the earth or have a supernova and wipe out the world?
No, The initial blast of a supernova is only about 10 lightyears at their largest, and there are only a handful of stars within that distance to us. Though even if a star 500 ly away did go super nova, there would be one awesome bright light in the sky (that would last for years).
Is crab nebula same as supernova?
It's not the same as a supernova--the Crab Nebula is the visible remnant of a supernova event which occurred about 7,500 years ago. The light from the supernova explosion reached the earth and was observed by Chinese and Arab astronomers about 1,000 years ago. The Crab Nebula was the first object to be identified with a supernova which was actually observed during recorded history.
What is cygnus a?
The Cygnus Loop is a giant remnant of a supernova, a star that exploded thousands of years ago and itæis 45 times the size of Earth's full moon. It is also 1500 light years from Earth.
How big is supernova cassiopeia?
Currently the expanding cloud from the supernova remnant is about 10 light years across.
What would happen if all the suns that can go supernova went supernova at the same time?
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.
What was the first supernova called?
Probably the Vela supernova in the southern constellation Vela. Its source supernova exploded approximately 11,000-12,300 years ago (and was about 800 light years away).
Which star if it were to go supernova is close enough to harm planet Earth?
The nearest likely supernova candidate I know of is Betelgeuse, which is about 640 light years away, and is already well off the main sequence in a Red Giant phase. In order to seriously disrupt Earth, a supernova would probably have to be significantly closer than that.
