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Basic Info Category
Classification
Effects on Earth
Candidates
100
This means new in Latin.
What is nova?
100
This is how many different subcategories there are of supernovas.
What is 5?
100
This is a supernova close enough to have noticeable effects on the biosphere.
What is a near-Earth supernova?
100
This is the closest possible supernova candidate to earth.
What is IK Pegasi?
200
It briefly does this to an entire galaxy.
What is outshines?
200
To be a type 1a supernova, it must lack hydrogen, but present this.
What is ionized silicon?
200
It can be this many light years away, and still have noticeable effect.
What is 3000 light years?
200
IK Pegasi's mass is this many times greater than the sun's.
What is 1.15 times greater?
300
It takes this long for a supernova to produce as much energy as the sun will in its entire life span.
What is only a few seconds?
300
This is what a supernova's spectrum must contain to be a type 2 supernova.
What is hydrogen?
300
These from the supernova would induce chemical reaction in the upper atmosphere on earth.
What are gamma rays?
300
It is thought that this many years will go by before IK Pegasi will become a supernova.
What is several million?
400
A supernova will shoot much, or all of its material at this fraction of the speed of light.
What is 1/10 the speed of light, or 30,000 km/s?
400
Type 2a must reach this in its light curve.
What is a plateau?
400
Gamma rays from the supernova would convert the molecular nitrogen into these, depleting the ozone layer.
What are nitrogen oxides?
400
If IK Pegasi ever becomes a supernova, it will be this type.
What is a type 1a supernova?
500
This is the product of the expanding shell of gas and dust swept up by the shock wave.
What is supernova remnant?
500
A type 2b supernova must display this in its light curve.
What is a linear decrease?
500
A supernova would have to be closer than this many light years away to have negative effects on earth.
What is 3000 light years.
500
IK Pegasi is this many light years away from Earth.
What is 150 light years away?