2025年3月17日 · What Is a Galaxy? The Short Answer: A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity. We live on a planet called Earth that is part of our solar system. But where is our solar system? It’s …

Arcing overhead, a faint band of light may appear that looks like milk spilled across the sky. The ancient Romans called the band via lacteal, which means “milky road” or “milky way.” The band of...

A galaxy is a group of stars, clouds of gas, and dust particles that move together through the universe. There are billions of galaxies in the universe. They probably formed billions of years ago, soon after the universe began. The Sun, Earth, and the other planets of the solar system are part of the Milky Way galaxy. Most galaxies move through ...

Galaxies are huge spans of gas, dust, dark matter, and from a million to trillions of stars. Everything in a galaxy is bound by gravity. Each star in a galaxy is a sun and there are thousands of solar systems in every galaxy.

The galaxy facts below will help you understand what a galaxy is, the different types of galaxies in our universe, what galaxy Earth is in, what are some famous galaxies and other useful galaxy facts.

Galaxies are immense structures of stars, gas, dust, stellar remnants, and dark matter. Billion of galaxies exist in our Universe, and our Milky Way is just one of them. Galaxies are a relatively recent discovery. A couple of years ago, we viewed them as nebulae.

Enjoy these fun galaxy facts for kids. Learn how about all the different types of galaxies in the universe, the Milky Way Galaxy that Earth sits in, the Local Group of galaxies we are part off, how many galaxies there are in the observable universe and much more. Read on for a range of interesting facts about galaxies.

2025年3月17日 · Find out more about what a galaxy is and how many there are. Make a pinwheel galaxy pinwheel! What is the Big Bang? What is a black hole? What is a planet? What is gravity? Everything! The James Webb Space Telescope is the largest, most powerful space telescope ever built. Become a NASA Space Place Explorer with these printable activity books.

2025年3月25日 · How Old Are Galaxies? What Is a Galaxy? What Is Dark Matter? What Is a Satellite Galaxy?

2024年8月9日 · A galaxy is a group of many stars, along with gas, dust, and dark matter. The name 'galaxy' is taken from the Greek word galaxia meaning milky, a reference to our own galaxy, the Milky Way. Gravity holds galaxies together against the general expansion of the universe. In effect, the expansion of the universe takes place between groups of ...