One
Which was the first celestial body to be identified as a black hole?
Cygnus X-1
Two
What type of celestial body was first observed by Jocelyn Bell Burnell and Antony Hewish?
Neutron stars
Three
What visible cue can you find that would warn you of a nearby black hole?
An accretion disk
Four
What physical quantity needs to be measured to determine the Schwarzschild radius of a body?
Its mass alone determines the size it would have if it becomes a black hole.
Five
The "black holes have no hair" theorem says that almost all information about the matter that falls into a black hole is destroyed in the process. What three quantities are exceptions to this rule?
Mass, net electric charge, and net angular momentum.
Six
Which element has the highest atomic number of all elements created in the Big Bang?
Iron, with atomic number 26. A supernova is the only known natural process to produce any higher elements.
Seven
How would your perception of reality differ if you were inside the event horizon of a black hole, but somehow still alive?
Our uncontrollable travel through time would halt, allowing us to freely move through time, but that uncontrollable travel would shift to the radial direction, drawing us inevitably to the singularity at the core of the black hole.
Eight
The first galaxy ever discovered was originally misidentified as what?
The Andromeda Galaxy was mistaken for a nebula
Nine
What is the Schwarzschild radius of the Earth?
0.887cm, or 0.349 inches. It's safe to say our planet will not become a black hole any time soon.
Ten
When was the first comet discovered by telescope?
1680
It was known as the Great Comet of 1680, Kirch's Comet, and Newton's Comet
It was known as the Great Comet of 1680, Kirch's Comet, and Newton's Comet
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