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Ever wondered how the Sun is burning up there in space when there’s no oxygen around? I mean, here on Earth, if you take away oxygen, any fire just dies out. So how come the Sun's been blazing for billions of years—without a single breath of air?

Well, here’s the thing: the Sun isn’t burning the way a campfire does. It’s not using oxygen at all. What’s really happening inside the Sun is something way more powerful—it’s called nuclear fusion. Deep in its core, the pressure and temperature are so extreme that hydrogen atoms crash into each other and fuse into helium. And every time that happens, a bit of mass turns into pure energy. That’s where all that light and heat come from.

And you might ask—if space is just empty vacuum, how does that heat get all the way to us? The answer is: radiation. The Sun sends out energy in the form of electromagnetic waves—like visible light, infrared, and ultraviolet. These waves don’t need air to travel. They zoom across space and reach Earth in just 8 minutes.

So next time you feel the warmth of the Sun on your skin—remember, that’s a nuclear engine 150 million kilometers away, shining just for you.