Event Horizon
When was the first image of a black hole captured?
2019
When was the first image of Sagittarius A* revealed?
May 2022
What is a midsize black hole called?
Intermediate Black Hole
What does LIGO stand for?
Laser Interferometer Gravitational-Wave Observatory
What galaxy do we live in?
The Milky Way Galaxy
From what galaxy was the first picture of a black hole taken?
M87 Galaxy
How many layers does a black hole have? Name them.
3. The outer event horizon. The inner event horizon. The singularity.
What are the three types of black holes?
Stellar mass black holes, supermassive black holes, intermediate black holes
How many stars does the Milky Way contain?
Over 100 billion
What is thought to lie at the center of pretty much every galaxy?
Supermassive Black Holes
What is the single point in space-time where the mass of the black hole is concentrated?
Singularity
What is the name given to the closest black hole to Earth?
The Unicorn
What famous physicist created mathematical equations that predicted the existence of black holes?
Albert Einstein
White dwarf or neutron star
How far away is Sagittarius A* from Earth?
26,000 light years away
What astronomer coined the term "black hole" in 1967?
What can be thought of as a tunnel that connect two separate points in space and time?
A Wormhole
What is the estimated range of the number of stellar black holes in the Milky Way Galaxy, according to NASA?
10 million - 1 billion
What is the primary fuel for stars?
Hydrogen
What is the name of the supermassive black hole at the center of our Milky Way Galaxy?
Sagittarius A*
What was the first detected black hole?
Cygnus-X1
Who predicted that black holes could radiate away energy and shrink very slowly?
Stephen Hawking
Who used Einstein's General Relativity equations to develop the theory of black holes?
Karl Schwarzschild
What ratio of stars are massive enough to become a black hole?
1 out of every 1,000 stars
What are the two distinct ways that black holes form?
1. When massive stars die
2. The direct collapse of gas