Blogpost 3: Galaxy Formation

Galaxies took over the whole cosmos since the beginning, they were like the first beautiful objects that came after the great big bang. But did we know where or how did these things start? How were they formed?

After the big bang, it is said here in the article I've read, Galaxy Formation by Frase Cain from universetoday.com that the universe was entirely hydrogen and helium with other elements. They said that the fluctuations started the process.That the vast cloudswith an increased density started to form. But still Fraser Cain asked, "How did we get from the first particles of hydrogen and helium left over from the Big Bang to the beautiful spiral galaxy structures we see today?" Astronomers thought that the universe was also made by matter, dark matter which outnumbered regular matter. Forming together, they've formed mass with gravity, then soon creating larger mass to form a "proto-galaxy." Proto-galaxies are the clouds of gases which will soon form into a galaxy. Eventually, the materials from a proto-galaxy will start to form regions then soon form stars. After those formations inside a proto-galaxy, the proto-galaxy will soon merge to another one to become large and soon become a spiral galaxy that are now present in this age.

Galaxies are massive, they contain number of stars and planets. Like it's sheltering them. It's the one which helped the stars and planets form and it has its center which could be the sole beginning of how it's formed. Galaxies are also made of huge amount of gas and has it tails like an octopus. There are millions of galaxies in our universe, and our Milky Way is just one of it. Do you think there's other life out there? Well, I guess we'll never know by now.

Edwin Hubble, an American astronomer and was also known as the most important cosmologist. Hubble is also one of the most contributors of galaxy discoveries, he's also the one who classified the characters of other galaxies. I've read an article entitled, Where Do Galaxies Come From? by Summer Ash from slate.com. It says here that Edwin Hubble spent all night just to take pictures of the heavens. In Hubble's time, galaxies were still debatable until Hubble discovered some that some galaxies are "irregular" or also called the "interacting galaxies." They're the types of galaxies that pulls each other gravitationally, to create odd shapes. It's also in the middle of the 20th century only they have discovered galaxies' black holes, superhead jets, plasma, and shockwaves. Our galaxy can be dangerous in some way isn't? There can be two types of galaxies, the blue ones and the red ones. The blue colored galaxy is hot while the red is cold. Ironic isn't? Of course when you think about red galaxies, you'll probably think that it's hotter than blue ones. It's because blue ones are dominated with active star formation while the red ones have very little gas and cooler stellar population.

It also says there in the article that the galaxies that are "Spiral" are younger while the galaxies that are "Elliptical" are older.

Atronomers are still studying on how could spiral galaxies run out of gas then eventually can turn into an elliptical galaxy. Many are still questioned, and some could only be answered through the future.

"The history of astronomy is a history of receding horizons." -Edwin Hubble

So yeah, defining these events may seemed hard for the astronomers or scientists. but through the very fast evolution of modern technology, I think we can strive this questionable things soon.

We can say that these process is still ongoing by this time, we can still say that there are many galaxies forming out there in the sky, like our Milky Way. Scientists once told us that we will soon collide with Andromeda. After that, will we be in danger? Who knows what might happen?