Gravitational Waves
Why it Matters?
The detection of gravitational waves from the merger of two exceptionally massive black holes, 140 and 100 times the Sun’s mass, respectively, challenges current astrophysical theories and deepens our understanding of the universe.
What You Should Know?
Gravitational waves are ripples in spacetime caused by accelerating massive objects like merging black holes or neutron stars.
They were first predicted in 1915 by Albert Einstein in his General Theory of Relativity.
Gravitational waves were first detected in 2015 by the Laser Interferometer Gravitational-Wave Observatory (LIGO) in the United States.
LIGO detects gravitational waves using laser interferometry, which measures minute changes in distance as waves pass through Earth.
Before 2015, scientists relied mainly on electromagnetic (EM) waves like light, X-rays, and radio waves to study the universe.
Gravitational waves, though invisible, travel at the speed of light and stretch or squeeze anything in their path.
They are generated by powerful cosmic events like supernovae, binary star systems, or merging black holes.
All moving massive objects generate gravitational waves, but only extremely energetic events produce waves strong enough to be detected on Earth.
Gravitational waves complement EM observations and help study phenomena that are otherwise invisible, like black hole mergers.
They provide new insights into the formation, structure, and evolution of the universe.