Our sun
Our sun
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The Sun is a massive, glowing ball of hot gas that sits at the center of our solar system. It provides the energy that makes life on Earth possible. The Sun is mostly made up of hydrogen (about 74%) and helium (about 24%), with small amounts of other elements like oxygen, carbon, neon, and iron. The Sun generates its energy through nuclear fusion, where hydrogen atoms fuse together to form helium, releasing an enormous amount of energy in the form of heat and light.
Image Credit: NASA
Earth size comparison - If Earth were a pea, the Sun would be roughly the size of a large exercise ball.
5 Interesting Facts About the Sun
5 Interesting Facts About the Sun
The Sun is HUGE - The Sun’s diameter is about 1.4 million kilometers (870,000 miles)—which is 109 times the diameter of Earth! You could fit about 1.3 million Earths inside the Sun.
The Sun is Middle-Aged -The Sun is about 4.6 billion years old and is expected to burn for another 5 billion years before it becomes a red giant and eventually a white dwarf. A red giant is a late stage in a star’s life when it runs out of hydrogen fuel. The core contracts while the outer layers expand, making the star much larger, cooler, and more luminous. Our Sun will become a red giant in about five billion years. A white dwarf is the final stage for small to medium-sized stars after they shed their outer layers. It is a dense, hot core that slowly cools over time. Despite being about the size of Earth, a white dwarf can have nearly the same mass as the Sun.
It Produces an Insane Amount of Energy - Every second, the Sun converts 600 million tons of hydrogen into helium, releasing energy equivalent to a trillion nuclear bombs exploding at once!
It Takes 8 Minutes for Sunlight to Reach Earth - Light from the Sun travels at 299,792 kilometers per second (186,282 miles per second) and takes about 8 minutes and 20 seconds to reach us.
The Sun Has a Powerful Magnetic Field - The Sun’s magnetic field is incredibly strong and creates sunspots, solar flares, and coronal mass ejections (CMEs), which can sometimes disrupt Earth's satellites and power grids.
Here’s a Sizzler of a fact about the Sun:
Here’s a Sizzler of a fact about the Sun:
The Sun’s atmosphere is HOTTER than its surface! This seems totally backwards, but while the Sun’s surface (the photosphere) is about 5,500°C (9,932°F), its outer atmosphere (the corona) can reach temperatures of 1-2 million°C (1.8-3.6 million°F). Scientists still don’t fully understand why this happens, but one theory is that magnetic waves transfer energy from the Sun’s interior into the corona, heating it up in a way that defies normal heat transfer.
Basically, the Sun’s outer layer is way hotter than the actual surface—which is like standing near a campfire and getting hotter the farther away you go!
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