What is the speed of Gravity?

Speed of Gravity? Surely that seems an absurd idea, but I wouldn’t discuss if there wasn’t a catch in it. According to Newton, Gravity was absolute, it is transmitted instantaneously between objects. ‘It doesn’t travel, it simply exists’. Einstein’s Special Theory of Relativity concluded that the Speed of Light is the ultimate speed, and nothing can…

Is there life out there?

I found no better discussion as the first post in the Philosophy of Being and Existence. But before I answer your question, answer me this: ‘Why is the Universe the way it is?’ I am asking this from a purely philosophical point of view, not fully scientific. One may argue that the Universe is as it…

Space-time fabric

Before Einstein, the viewpoint of scientists was that Time was Absolute. It does not change for anyone. You can imagine it as the whole universe having a single pace of time. So if an hour has passed for me, an hour would pass for anyone travelling with some velocity, an hour for someone on top…

What’s wrong with Gravity?

To be honest, gravity is probably the only reason we are on this planet. We wouldn’t have existed if there was no gravity in the first place, but imagine the case where the gravity from Earth suddenly vanishes for humans, and not for any other body like our Moon. What would happen? Well, on Equator,…

Scale of the Universe

The Universe is big, but how big is it? One answer can be that it is infinite, so can’t be measured; which is true. The Universe is so big that in the past 13.8 billion years, light from distant galaxies hasn’t even reached us! If we talk in terms of the observable universe, that is measuring…