Question

Observation of gravitation

Answer 1

Explanation:

The first direct observation of gravitational waves was made on 14 September 2015 and was announced by the LIGO and Virgo collaborations on 11 February 2016. Previously, gravitational waves had only been inferred indirectly, via their effect on the timing of pulsars in binary star systems.

Answer 2

Answer:

I observe gravitational force in my surroundings.

Explanation:

for observing gravitational force,first u need to throw anything up (sky).

for example: a boy throw a foot ball it takes more time to reach up but when it comes down,it takes very less time to reach the ground.

here,we can observe gravitational force.

hope, this will help you.....