Big Bang

Everything we see around us, from grains of sand to trees, mountains, Earth, galaxies, and the universe, was formed after the Big Bang, a massive explosion that marked the beginning of the Universe.

Around 13.7 billion years ago, everything in the Universe was packed into a single hot, dense, tiny point.

Then, a massive explosion took place, causing the Universe to expand rapidly, creating space, matter, energy, and time.

At first, the Universe was so hot that only tiny particles, like protons, neutrons, and electrons, could form. As it expanded and cooled, these particles combined to create simple atoms like hydrogen and then helium.

Gravity pulled these atoms together into clumps, forming the first stars. Over time, stars grouped into galaxies, creating the vast cosmic structures we see today.

In 1964, scientists discovered cosmic microwave background radiation, a faint glow of heat left over from the Big Bang, providing crucial evidence.

Even the fact that galaxies are moving away from us today shows that the Universe is still expanding from that original explosion.