What is galaxy explain?

What is galaxy explain?

A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems. A galaxy is held together by gravity. Our galaxy, the Milky Way, also has a supermassive black hole in the middle. When you look up at stars in the night sky, you’re seeing other stars in the Milky Way.

What is inside the galaxy?

Galaxies are sprawling systems of dust, gas, dark matter, and anywhere from a million to a trillion stars that are held together by gravity. Nearly all large galaxies are thought to also contain supermassive black holes at their centers.

Is Earth in a galaxy?

Earth is in the second largest galaxy of the Local Group – a galaxy called the Milky Way. The Milky Way is a large spiral galaxy. Earth is located in one of the spiral arms of the Milky Way (called the Orion Arm) which lies about two-thirds of the way out from the center of the Galaxy.

What is Earth’s galaxy called?

Astronomy > The Milky Way Galaxy. Did you know that our star, the Sun, is just one of hundreds of billions of stars swirling within an enormous cosmic place called the Milky Way Galaxy? The Milky Way is a huge collection of stars, dust and gas.

Why is it called a galaxy?

Etymology. The word galaxy was borrowed via French and Medieval Latin from the Greek term for the Milky Way, galaxías (kúklos) γαλαξίας (κύκλος) ‘milky (circle)’, named after its appearance as a milky band of light in the sky.

Who made the galaxy?

Galaxy is a chocolate bar, made and marketed by Mars Inc., and first manufactured in the United Kingdom in the 1960s.

How old is the galaxy?

Astronomers believe that our own Milky Way galaxy is approximately 13.6 billion years old. The newest galaxy we know of formed only about 500 million years ago.

Can we go inside galaxy?

The technology required to travel between galaxies is far beyond humanity’s present capabilities, and currently only the subject of speculation, hypothesis, and science fiction. However, theoretically speaking, there is nothing to conclusively indicate that intergalactic travel is impossible.

How was galaxy created?

After the Big Bang, space was made up almost entirely of hydrogen and helium. Some astronomers think that gravity pulled dust and gas together to form individual stars, and those stars drew closer together into collections that ultimately became galaxies.

What is our universe called?

There is no current name for our Universe, other than simply “the Universe”, although we have names for our own home in the cosmos. Earth is part of the solar system of planets revolving around our Sun. The Sun is one of hundreds of billions of stars in the Milky Way Galaxy.

How many galaxies do we have?

If we made the most straightforward estimate using today’s best technology, we’d state there are 170 billion galaxies in our Universe. But we know more than that, and our modern estimate is even grander: two trillion galaxies.

Is our galaxy moving?

The Milky Way itself is moving through the vastness of intergalactic space. Our galaxy belongs to a cluster of nearby galaxies, the Local Group, and together we are easing toward the center of our cluster at a leisurely 25 miles a second.

How old is the Sun?

How many stars are in a galaxy?

Using the Milky Way as our model, we can multiply the number of stars in a typical galaxy (100 billion) by the number of galaxies in the universe (2 trillion).

How big is the universe?

While the spatial size of the entire universe is unknown, it is possible to measure the size of the observable universe, which is approximately 93 billion light-years in diameter at the present day.

What are galaxy and explain its types?

Astronomers classify galaxies into three major categories: elliptical, spiral and irregular. These galaxies span a wide range of sizes, from dwarf galaxies containing as few as 100 million stars to giant galaxies with more than a trillion stars.

What are the 4 types of galaxies?

The smallest of galaxies contain a “mere” few hundred million stars while the largest galaxies contain up to one hundred trillion stars! Scientists have been able to segment galaxies into 4 main types: spiral, elliptical, peculiar, and irregular.

What is the answer to the galaxy?

The number 42 is, in The Hitchhiker’s Guide to the Galaxy by Douglas Adams, the “Answer to the Ultimate Question of Life, the Universe, and Everything,” calculated by an enormous supercomputer named Deep Thought over a period of 7.5 million years.

What are 5 facts about the galaxy?

10 Facts about the Milky Way

• It’s warped. …
• It has an invisible halo. …
• It has over 200 billion stars. …
• It’s really dusty and gassy. …
• It was made from other galaxies. …
• We can’t take pictures of it. …
• There is a black hole at the center. …
• It’s almost as old as the Universe itself.