The first direct detection of gravitational waves was a major scientific breakthrough that confirmed the existence of gravitational waves, opened up a new window to study the universe, and provided strong evidence for the validity of General Relativity.

The first direct detection of gravitational waves was made by the Laser Interferometer Gravitational-Wave Observatory (LIGO).

The first direct detection of gravitational waves was made on September 14, 2015.

The first direct detection of gravitational waves was caused by the collision of two black holes.

The two black holes that collided had masses of 36 solar masses and 29 solar masses.

The collision was located 1.3 billion light-years away from Earth.

The gravitational wave signal detected by LIGO lasted for 0.2 seconds.

The frequency of the gravitational wave signal detected by LIGO ranged from 35 Hz to 250 Hz.

The amplitude of the gravitational wave signal detected by LIGO was approximately 10^-21 meters.

The first direct detection of gravitational waves was made by the LIGO Scientific Collaboration.

The first direct detection of gravitational waves involved two detectors: one in Hanford, Washington, and the other in Livingston, Louisiana.

Gravitational waves are detected using a technique called interferometry.

The existence of gravitational waves is predicted by General Relativity.

Albert Einstein was the first person to propose the existence of gravitational waves.

The first direct detection of gravitational waves has significant implications for cosmology, as it provides a new way to study the early universe, allows us to measure the expansion rate of the universe, and helps us to understand the formation of galaxies and black holes.