If the Sun disappeared right now, the Earth would not be aware of the event for about 8 minutes and 20 seconds because that is how long it takes sunlight to reach the Earth.
Interestingly, changes in the gravitational field also propagate at the speed of light, so the Earth continues to move in approximately its previous orbital motion until this change occurs.
After about 8 minutes and 20 seconds, both the sunlight and its gravitational effect cease to reach the Earth. As a result, instead of revolving around the Sun, the Earth continues to move almost tangentially to its previous orbit. This phenomenon is one of the results of the general theory of relativity.It’s Einstein
