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Cygnus X-1
How do they begin?
Extras
100
Is the swan star brighter than the sun?
Yes, because of HDE 226868, it is about 300,000 times brighter.
100
Can some black holes begin as a supernova?
Yes, they can.
100
What is a black hole?
A black hole is a deadly space object that can destroy anything.
200
Is the star besides HDE 226868 in the swan star bigger or smaller than the sun?
It is about 15 times smaller.
200
Are black holes dense?
Yes, very dense.
200
Can light escape a black hole?
No, nothing can.
300
About how many light years away is Cygnus X-1?
Several thousand.
300
What type of star is impossible to stop when it is collapsing?
A giant star.
300
Can black holes collide?
Yes, they can to form a bigger one.
400
the black hole's surface is called a ________ ?
Event horizon.
500
What is the name of the blue supergiant that fused with another star to create the swan star?
HDE 226868.
500
Black holes are mainly formed by what?
Gravity.
500
Do black holes die out?
Yes, hey eventually evaporate.