Ripples in spacetime
Chapter 1
Einstein's wild prediction
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Chapter 2
The ultimate measuring sticks
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Chapter 3
The day the universe trembled
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Chapter 4
The future of wave hunting
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YOUR GOAL
Master of Ripples in spacetime
Ch 3 · The day the universe trembled
Fun Fact
Cosmic power output: For a tiny fraction of a second, the collision of the first two detected black holes released more energy than all the stars in the universe combined.
Glossary
gravitational wave (noun)
A ripple in the fabric of spacetime caused by the acceleration of massive cosmic objects. On September 14, 2015, LIGO detectors first recorded these ripples, which originated from merging black holes.
A ripple in the fabric of spacetime caused by the acceleration of massive cosmic objects. On September 14, 2015, LIGO detectors first recorded these ripples, which originated from merging black holes.
Quiz
What heavy elements were discovered being produced during the 2017 neutron star merger?
Quiz
How long ago did the black hole collision that produced the first detected wave take place?
Quiz
What sound does a gravitational wave signal make when converted into an audio track?
Quiz
In what year did scientists make the first direct detection of a gravitational wave?
Quiz
How much mass was converted into pure energy during the first detected black hole merger?
Quiz
What is the name of the cosmic explosion that occurs when two neutron stars collide?
Quiz
What kind of cosmic event produced the first directly detected gravitational wave, GW150914?