Black holes are the most mysterious objects in the Universe. Their gravity is dangerously strong. They suck in everything that comes too close. Moreover, they
If you topple a bottle of water, the liquid flows out very fast. But turn over a container of treacle, andit takes ages to empty.
Have you ever played with a magnet? It’s like magic. A magnet has an invisible force field. You can only see it indirectly. For instance
Look around you. You see the text you are reading right now. You see the room where you’re sitting in. Outside the window, you may
The Sun is a star. Not many people know that. It’s a star like all the other stars in the night sky. Or, put differently:
Did you know that you are made of star stuff? It’s true! Many of the atoms in your body were created in other stars. It’s