03/24/2026
It sounds surprising, but there’s a fascinating story behind it.
The Sun formed about 4.6 billion years ago from a giant cloud of gas and dust collapsing under gravity. At the same time, the planets including Earth began forming from leftover material around it. So yes, the Sun is slightly older than Earth itself.
But the water on Earth has an even deeper history.
Some of the hydrogen atoms that make up water molecules were created shortly after the Big Bang, nearly 13.8 billion years ago. Oxygen formed later inside ancient stars that lived and died long before our Sun was born.When those stars exploded, they spread these elements into space.
In cold regions of space, hydrogen and oxygen combined on dust grains to form water ice long before our solar system existed. When the Sun and planets formed, some of this ancient water became trapped inside comets, asteroids, and the material that built Earth.
Over time, these objects delivered water to our young planet. That means a portion of the water you see today may be older than the Sun itself, carrying a history that stretches back to the earliest chapters of the universe.
So when you look at water on Earth, you’re not just seeing something from our planet you’re seeing something that has traveled through cosmic time.
