Galaxy Evolution Lab

Galaxy Classification and Evolution Lab was very informative. Through the course of this lab we were able to break everything down and classify galaxies through several pictures. The spiral galaxies have a bulge and a disk with spiral arms filled with gas and dust. The elliptical galaxies tend to be very smooth and regular, with little to no gas and dust. The lenticular galaxies are often get confused with the elliptical galaxies, though, they have a disk and a bulge, whereas, the elliptical do not. Irregular galaxies basically do not have any definite shape to be classified into a galaxy classification. Some irregular galaxies have a weird shape and even be classified at IRR II. In the first part of the lab my group members and I classified …show more content…
These were images that were captured by the Anglo Australian Observatory, and we were able to look deep in the color of the galaxies and come to a conclusion to why and how the galaxy if that particular color.
Furthermore, we looked at the different types of galaxies on their environment. We compared the Hercules and Coma clusters and compared them by the types of galaxies they were. When we did that we compared the two local clusters and we were able to get an approximate number of how many elliptical galaxies, spiral galaxies and how many irregular galaxies. Furthermore, we created a table to display the amount of galaxies there were from the Hercules cluster and the Coma Cluster. When compared them to each other we also compared them to nearby galaxies that are observed today and also distance …show more content…
The colors of the spiral, elliptical and irregular galaxies have different amounts of gas and dust. The galaxies that appear bluer are more hot and dense, whereas, the galaxies that appear white-yellowish are cooler galaxies with little to no gas and dust. Furthermore, we compared the bulge of spiral galaxies and elliptical galaxies to see how they are similar we came to the conclusion that they are similar because, they are both held together by gravity. We looked at NGC55 and NGC7 and we came to the conclusion of the reddish glow is created by the young hot massive stars. It is not visible because it is only a formation of gas and dust and not stars, they are heated by the nearby stars. In continuation, NGC 6745 is more than likely has a blue giant star in their galaxy. Blue giants are the hottest stars in the night sky and the luminosity of them are very bright. Causing their light to reflect and bounce off the gas and dust. PART THREE: Galaxy Environment This is where we looked and compared the Coma cluster and the Hercules cluster. The dominant type of galaxy found in the Coma cluster are elliptical galaxies and the dominant type of galaxies found in the Hercules cluster are spiral galaxies. Using the photos that were given in our lab we clarified thirty galaxies and counted the number of each category. As seen on the data table on the next

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