Colliding Galaxies



I am very sure that most people know about galaxies. But, what you (probably) didn’t know is that galaxies can emerge and form a different type of galaxies. Some can be really odd, you know!
Why do galaxies collide? Because of gravity. Well, not gravity from the galaxies, it’s the gravity from dark matter. Later, they start getting nearer and nearer and nearer and finally they collide. However, this process may take billions of years.

When galaxies collide together, what happens to all the planets and stars? NOTHING. Nothing happens because galaxies are actually mostly empty space. So the stars and planets never collide. The only thing that happens is that both galaxies become one and the galaxies get a new form. Oh, and also, it gets a new name.

An example of colliding galaxies that will collide to each other is the Milky Way galaxy and the Andromeda galaxy. It will collide in around 4 billion years. The new galaxy will be formed in 10 billion years. In numerals that’s 10,000,000,000 years. The new galaxy that will be formed already has a name today. It’s called Milkdromeda. Geez, not too creative. They just compromised it.

If you actually don’t know what a galaxy is, or you don’t know what dark matter is, I will write a blog about it. I promise you, it will be fun!


Thank you for reading. - Nat

Comments

Post a Comment

Popular posts from this blog

Vectors and Scalars

Image
I want to talk about Vectors and Scalars . This is about physics. Now you might be asking, what is a vector? Vectors have a magnitude and direction. In case you don’t know, magnitude is the size of the movement, but it’s not distance. Since it’s a vector quantity, it’s called displacement .  For example, the displacement of a leaf being blown by the wind is 50 centimeters to the east. This is a vector quantity because it has a magnitude (50 cm) and a direction (east). And there’s more...  If someone asks you the version of speed in a vector quantity, it’s called velocity .  For example, the velocity of a ball being thrown is 5m/s to the east. In other words, five meters per second to the east.  You can find the displacement as long as you have the velocity and time. Multiply them and you will get the displacement. If the velocity is 5m/s and the time is 10 seconds, you need to multiply them ( 5 x 10 ) to get the displacement, which is 50 meters.  A...
Read more

Cheryl's Birthday Problem (from SASMO 2015) and Solution

Image
Hello! Nat here, and in this blog, I am going to discuss and give the solution to the famous Cheryl birthday problem. This was popular because it is a difficult logic puzzle and involving the ability of carefully tracking down hints in the conversation and working with only a small amount of data. Here’s the question: Albert and Bernard just became friends with Cheryl, and they want to know when her birthday is. Cheryl gives them a list of 10 possible dates. May 15           May 16           May 19 June 17          June 18 July 14           July 16 August 14       August 15       August 17 Cheryl then tells Albert and Bernard separately the month and the day of her birthday respectively. Albert: I don’t know when Cheryl’s birthday is, but I know that Bernard doesn’t know too. Bernard: At first I don’t know whe...
Read more

Black Holes

Image
Black Holes are holes in space that absorbs anything in their way, even stars. They are made by a star exploding as supernova and the star must be about 3 times the mass of the sun. This is called the Oppenheimer-Volkoff limit.  Its core will collapse into a neutron star, but its gravity is so strong that it starts sucking in material from outer space and later turns into a black hole.  Once they absorb enough matter to become powerful and massive, they can start creating galaxies. That is why black holes can be found in the heart of galaxies.  Sometimes, black holes will emit the brightest light waves in the universe – quasars.  Now you might be asking, why don’t we see like “blink, blink” from earth? The answer is that they are very far. The furthest quasar from us is about 14 billion light years away. However, we are lucky to be on a planet that isn’t near a black hole. If we were near a black hole, we would get our atmosphere stripped first then ...
Read more