Table of Contents
Why can we only see part of the galaxy that we live in?
We, in our humble Solar System, are roughly 28,000 light years away from it. In short, this region is simply too far for us to see with the naked eye.
Why we observe distant galaxies to be moving away from us and therefore believe that the universe is expanding but we don’t see individual galaxies or clusters expanding?
4) Explain why we observe distant galaxies to be moving away from us and therefore believe that the universe is expanding, but we don’t see individual galaxies or clusters expanding. Answer: The pull of gravity works to slow the expansion rate of the universe.
Can we see Milky Way galaxy from Earth?
The Milky Way is visible from Earth as a hazy band of white light, some 30° wide, arching the night sky. In night sky observing, although all the individual naked-eye stars in the entire sky are part of the Milky Way Galaxy, the term “Milky Way” is limited to this band of light.
Is there a black hole in every center Galaxy?
Observational evidence indicates that almost every large galaxy has a supermassive black hole at the galaxy’s center. The Milky Way has a supermassive black hole in its Galactic Center, which corresponds to the location of Sagittarius A*.
In which direction are nearly all galaxies moving?
Edwin Hubble discovered that most of the galaxies are moving away from us and away from each other. Hubble also discovered that there is a relationship between the distance to a galaxy and its speed. Hubble’s law states that the farther away a galaxy is, the faster it is moving away from us.
Are there stars between the arms of the Milky Way?
Our Milky Way galaxy is the island of stars we call home. Our solar system lies between two prominent spiral arms, in what astronomers once thought was a mere bridge of stars, gas, and dust clouds.
What is a galaxy held together by?
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 the nearest neighboring galaxy to our galaxy?
Our nearest major neighboring galaxy is called Andromeda. We know of thousands of planets — called exoplanets — orbiting other stars in our galaxy. When you look up into the night sky, every star you see has, on average, at least one planet. About two-thirds of the known galaxies are spiral-shaped like our Milky Way galaxy.
Where do we live in a galaxy?
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?
What is the shape of the Stars in our galaxy?
The stars are arranged in a pinwheel pattern with four major arms, and we live in one of them, about two-thirds of the way outward from the center. Most of the stars in our galaxy are thought to host their own families of planets. The Milky Way galaxy is just one of billion of galaxies in the universe.