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Our Sun is a 4.5 billion-year-old yellow dwarf star – a hot glowing ball of hydrogen and helium – at the center of our solar system. It’s about 93 million miles (150 million kilometers) from Earth and it’s our solar system’s only star. Without the Sun’s energy, life as we know it could not exist on our home planet.
- The Sun
The connection and interactions between the Sun and Earth...
- The Sun
The Sun is the star at the center of the Solar System. It is a massive, nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface mainly as visible light and infrared radiation with 10% at ultraviolet energies.
- The Sun Is A Star
- The Sun Compared to Other Stars
- What Is A Star
- Summary
Sunis the name we use for the star at the center of our Solar System. It is the star we see rising in the East in the morning and the one that bathes our planet’s surface with heat. So yes, the Sun is a star. However, not all stars are suns. Using the term sun to refer to any other star is incorrect. Sun is not a synonym for star. So why is it some...
Our Sun is a very average star. It’s a main-sequence yellow star that is around the middle of its lifespan. It is in the middle of the pack in terms of size too, and like most stars, it is not part of any multi-star system. There are millions of other stars that are very much like our Sun, and fewer with different characteristics, but let’s compare...
If you still have questions about what a star actually is and why the Sun is one, hopefully, this will help. Stars are huge spheres of hot gas and plasma. The star is constantly being pushed and held together by its own gravity, and because of these, nuclear reactions start happening in its core, constantly releasing light and heat. Tho closest sta...
The Sun is the star at the center of our Solar systemThe Sun is a star, but only our star is called the sunThere are stars of many typesThe connection and interactions between the Sun and Earth drive the seasons, ocean currents, weather, climate, radiation belts and auroras. Though it is special to us, there are billions of stars like our Sun scattered across the Milky Way galaxy. The Sun has many names in many cultures. The Latin word for Sun is “sol,” which is the main ...
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How big is the Sun?
- Our Sun is a star, like the hundreds that you see at night, only much, much closer. The Sun is a huge ball of hot, churning, unpredictable supercharged gasses called plasma.
- The Sun is like an onion: it has layers. Although the Sun doesn’t have a solid surface like Earth, it does have six layers, each one with a different density of plasma.
- The Photosphere. The photosphere is what you see when you look up at the Sun. (Always use “eclipse glasses” to do this!) It’s the visible surface of the Sun, not a solid surface like on planets.
- The Chromosphere. Sandwiched between the visible photosphere and the corona is the gorgeous chromosphere. Wild magnetic fields formed in the photosphere extend out through the chromosphere, creating eruptions and storms, prominences and flares.
Oct 18, 2023 · Our Sun is a middle-aged star, approximately 4.6 billion years old. It formed from the gravitational collapse of a region within a large molecular cloud primarily composed of hydrogen and helium ...
Mar 16, 2022 · The sun is a yellow dwarf star in the center of the solar system, and it is the largest, brightest and most massive object in the system. The sun formed around 4.5 billion years ago. At that time ...
