What is the approximate diameter of the observable universe?
Answer
93 billion light-years
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What is the approximate diameter of the observable universe?
Answer
93 billion light-years
In what year did the Event Horizon Telescope reveal the first image of Sagittarius A*, the Milky Way’s central black hole?
Answer
2022
Which gravitational-wave event was the first confirmed merger of two neutron stars?
Answer
GW170817
Which theorem states that the total area of a black hole’s event horizon cannot decrease?
Answer
Black hole area theorem
What is the approximate mass of the supermassive black hole M87*?
Answer
6.5 billion solar masses
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Which theorem states that the total area of a black hole’s event horizon cannot decrease?
Answer
Black hole area theorem
What is the approximate mass of the supermassive black hole M87*?
Answer
6.5 billion solar masses
What is the name of the NASA space telescope launched in December 2021 that studies early galaxies and black holes?
Answer
James Webb Space Telescope
What term describes the dark central region seen in the Event Horizon Telescope image of M87*?
Answer
Black-hole shadow