We gain so many New Telescope Images through our scientists. Ever wonder how many kinds of galaxies are there in our universe? The name of our galaxy where we belong is “Milkyway”. There are billions of such galaxies in our universe. Not only do they exist but also differ in size and shape. These massive galaxies are enormous and made up of gas, dust, and stars. Some galaxies are so huge that there are more than trillions of stars in them. Sounds interesting!
How many types of galaxies do we have?
So here, we are going to gain knowledge about categories of galaxies that are classified by astronomers. Astronomers have grouped them into three main categories:
1. Spiral (our own Milkyway falls in this category. 2. Elliptical and 3. irregular)
We already discussed, that our own Milkyway is an example of Spiral Galaxies. Spiral galaxies have spiral arms which give them a look-alike of pinwheels. When we look at the images of these spiral galaxies they give a glimpse like a disc of stars. The spiral arms of these galaxies consist of gas and dust. Spiral galaxies give birth to many stars. Further Spiral galaxies are divided into two categories, barred spirals, and normal spirals. Astronomers assume the Milkyway as a part of a barred spiral galaxy.
New Telescope Images | Irregular Galaxies
As the name says these are irregular-shaped galaxies, these are abundant in universe, and they are believed to be formed in the earlier era of the universe, earlier the era than spirals and elliptical galaxies. Unlike spiral galaxies, these galaxies don’t contain much gas and clouds of dust. Astronomers have concluded that irregular galaxies collided and merge with other galaxies and formed spiral and elliptical galaxies.
Elliptical galaxies are enormous and found commonly in the universe. Like irregular galaxies, they contain a smaller proportion of gas and dust. They are the home of many old stars and they generally don’t form new stars. These galaxies are believed to be formed by collisions and mergers. As the collision and mergers of galaxies are a very common activity in the universe, they are in large numbers as compared to other types of galaxies. The largest and rarest elliptical galaxies are called as giant ellipticals and they are about 300,000 light-years across. The galaxies which we can spot easily are dwarf ellipticals that are only a few thousand light years distance away from us.
Stephan’s Quintet Grouping of five Galaxies. The distance from the earth for Stephan’s Quinet is about 290 million light-years away. The above image is taken by the James Webb Space Telescope of Stephan’s Quintet. This image shows five galaxies. In the image, it is visible that the four galaxies interact with each other with their gravitational forces. The composite image holds nearly 150 million pixels and includes 1000 different image files.
The below images show “sparkling groups” of millions of young stars, “sweeping tails of gas dust and stars”
The galaxy which is closer to Earth among Stephan’s Quinet Group of Galaxies
Although it is a group of five galaxies, four of them are relatively closer. NGC 7320 is much closer to earth (40 million light years away from earth) than others. The other four Galaxies are NGC 7317, NGC 7318A, NGC 7318B, and NGC 7319, located behind NGC 7320. NGC 7317, NGC 7318A, NGC 7318B, and NGC 7319 are nearly 290 million light years away from earth.
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