The blue shift in the spectrum of the Andromeda galaxy indicates that it is moving towards the Earth and the rest of the solar system. This is because the light waves from the galaxy are compressed as it moves closer, causing the wavelength to shift towards the blue end of the spectrum.
We can tell the distance is decreasing because the light from Andromeda is blue shifted. That galaxy is closing in on us (or vice versa) 500,000 km (300,000 miles) per hour.
The only real way to demonstrate this is to see Andromeda and all the local group of galaxies in one diagram sketch showing all of the proximities of the Milky way and it's satelite groups and all of the Andromeda satelite group of galaxies. I can tell you that Andromeda is found about 20 widths of our galaxy away however I repeat you need to see this by drawing to comptemplate it. May i suggest you search for "Our Galactic Realm"
The nearest neighbor galaxy to the Milky Way is the Andromeda Galaxy, also known as M31. It is located about 2.537 million light-years away from Earth and is part of the Local Group of galaxies. Andromeda is on a collision course with the Milky Way and will eventually merge with our galaxy in about 4.5 billion years.
The word "sun" is a unique name we give to the star in our solar system. But the word can be applied to any star that has planets orbiting it. However, it's really impossible to tell. We don't know exactly how many stars are in our own galaxy, let alone another galaxy. Did you know that hundreds of planets have been discovered outside of our solar system? ~Apple Juice
The blue shift in the spectrum of the Andromeda galaxy indicates that it is moving towards the Earth and the rest of the solar system. This is because the light waves from the galaxy are compressed as it moves closer, causing the wavelength to shift towards the blue end of the spectrum.
We can tell the distance is decreasing because the light from Andromeda is blue shifted. That galaxy is closing in on us (or vice versa) 500,000 km (300,000 miles) per hour.
The only real way to demonstrate this is to see Andromeda and all the local group of galaxies in one diagram sketch showing all of the proximities of the Milky way and it's satelite groups and all of the Andromeda satelite group of galaxies. I can tell you that Andromeda is found about 20 widths of our galaxy away however I repeat you need to see this by drawing to comptemplate it. May i suggest you search for "Our Galactic Realm"
There isn't "more gravity" in the Andromeda galaxy, because that's essentially a meaningless phrase. It used to be believed that the Andromeda galaxy was larger and more massive than the Milky Way. It's still thought to be larger (in terms of the number of stars), but the Milky Way may actually be more massive. It's hard for scientists to tell how exactly how big the Milky Way is because we're inside it and "can't see the forest for the trees".
The nearest neighbor galaxy to the Milky Way is the Andromeda Galaxy, also known as M31. It is located about 2.537 million light-years away from Earth and is part of the Local Group of galaxies. Andromeda is on a collision course with the Milky Way and will eventually merge with our galaxy in about 4.5 billion years.
The nearest large Galaxy is the Andromeda Galaxy or M31 (also Great Andromeda Nebula in old texts)It is a spiral galaxy, located about 2.5 million years from us.Unlike most galaxies, the Andromeda Galaxy is getting nearer to us and will eventually in a few billion years time "merge" with the Milky Way.See related link for more information
The word "sun" is a unique name we give to the star in our solar system. But the word can be applied to any star that has planets orbiting it. However, it's really impossible to tell. We don't know exactly how many stars are in our own galaxy, let alone another galaxy. Did you know that hundreds of planets have been discovered outside of our solar system? ~Apple Juice
There are 2 much smaller irregular galaxies that orbit our galaxy called the Magellanic Clouds. These are abbreviated LMC and SMC (large and small Magellianic Cloud). These will one day gradually collide with The Milky Way but it is a long time until that happens; no need to worry. There is also the Andromeda Galaxy which is on a collision course with us.
You really can't tell the difference between a star and a galaxy with the naked eye. With a modest telescope, you can pick out a few hundred.In the 1700's, the French astronomer Charles Messier was a comet hunter. He kept finding things that looked like comets, but were not. Messier compiled a catalog of 110 objects; many of them turned out to be galaxies.If you have a telescope, you can probably find several "Messier Objects", such as the Andromeda Galaxy (M31) or the Pinwheel Galaxy (M33).
It is sometimes difficult to tell; our judgment of the size of another galaxy is greatly influenced by the DISTANCE to the other galaxy, and the distance to another galaxy is sometimes tough to know with any precision. Astronomers have revised their distance estimates several times, and we cannot know that we're right THIS time. But based on what we currently believe to be true, the Milky Way is a larger-than-average galaxy similar to the Andromeda galaxy.
We don't for sure as our vantage point does not allow us to determine that. However, by viewing other spiral galaxies (Andromeda, Sombrero galaxies) we can make a calculated guess that our galaxy is shaped in the same way.Also, while we can't see the galaxy as a whole, what we can see is consistent with it being a flat disk... specifically, we can even tell that it appears to be a barred spiral galaxy.
you hise a ball some where and your partner has to search for it and tell you if you're getting closer or farther away.