The universe is vast, mysterious, and filled with billions of galaxies. Among them, one holds a special place — the Milky Way Galaxy. Seen as a glowing stretch of light across the night sky, the Milky Way is not just beautiful to look at, but it’s also the galaxy where Earth and the entire solar system exist.
1.What Exactly Is the Milky Way?
The Milky Way is a barred spiral galaxy, meaning it has curved arms spiraling out from a central bar-shaped core. It spans over 100,000 light-years in diameter and is estimated to contain 100 to 400 billion stars. Along with stars, it contains clouds of dust, gas, planets, and other cosmic objects — all held together by the powerful force of gravity.
2. Why Is It Called the Milky Way?
The name "Milky Way" comes from Latin word Via Lactea, which means "milky road". Ancient stargazers imagined it as a trail of spilled milk across the sky. Civilizations such as the Greeks, Romans, Chinese, and Native Americans had their own unique stories and myths about this heavenly ribbon.
3.Where Is the Solar System in the Milky Way?
The solar system is located in a small arm called the Orion Arm, about 27,000 light-years away from the galaxy’s center. It takes the Sun roughly 225–250 million years to orbit the galactic center once. This massive journey is known as a galactic year.
4.The Supermassive Black Hole at the Center:
At the heart of the Milky Way is a supermassive black hole called Sagittarius A*. It has a mass over 4 million times that of the Sun. Though invisible, it plays a key role in how stars and objects move within the galaxy, acting as a cosmic anchor.
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