* The Goldilocks Zone: Earth resides in what's called the "habitable zone," or "Goldilocks zone," around the Sun. This zone is just the right distance for liquid water to exist on the surface.
* Too Close: If Earth moved significantly closer to the Sun, the temperature would drastically increase. Water would boil away, making life as we know it impossible. The planet would essentially become a scorching desert.
* Too Far: If Earth moved further away from the Sun, the temperature would plummet. Water would freeze solid, and the planet would become an icy wasteland.
So, how much closer or further could Earth move before things get bad?
* Closer: It's estimated that if Earth moved about 5% closer to the Sun, it would be too hot for liquid water to exist.
* Further: If Earth moved about 15% further away from the Sun, it's estimated that the average global temperature would fall below freezing.
Important Note: These are rough estimates, and there are many factors that contribute to Earth's climate.
Let's be clear, the Earth is not moving significantly closer or further from the Sun anytime soon. These are hypothetical scenarios. The Earth's orbit is stable and predictable, thanks to the gravitational forces between the Earth and the Sun.
