Little Geek Nat

Galaxies are the huge, gassy, and massive things that fly around in space.  They are quite massive because they have a LOT of stars inside. They also hang around in groups! Now we will have a tour on galaxies and ‘talk’ to them personally! The Milky Way Hello! I’m the Milky Way and I’m the home of your precious star, The Sun! Deep in my center, I have a Supermassive Black Hole! I’m very thin like a disk and I’m only 1,000 light years (ly) thick. My bulge in the middle is 3,000 ly thick. However, I’m 100,000 ly across, which is really long! The Sun actually travels at 220,000 km/h! That’s because it’s orbiting my center! Andromeda Galaxy or M31 Good day! I’m your galaxy’s closest neighbor even though I’m still very far! However, I’m on a crash course with your galaxy because I’m a bit too close for comfort. For more information, see Colliding galaxies . Our new galaxy will be an elliptical galaxy called… ‘Milkdromeda’? Yeah, I know. It's uncreative, just comprom...

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 tha...

Red giants are one of the biggest types of stars. An example of a red giant is Betelgeuse (pronounced bettle juice. Ugh.) and Antares. They are made when fusion in their core actually turns helium into carbon, then carbon into oxygen, then into silicon, then they die when they fuse into iron. They are much too massive and in the end…… BOOM, we have a supernova (Now THAT’S where gold and uranium are made). The biggest red giant known (so far) is UY Scuti, located in the constellation Scutum. To imagine how big it is, UY Scuti has about 1700 times of our Sun’s radius! However it is very far from us (9500 light years away). It is really large at a diameter of 1 - 1.3 billion miles but I think it should be near the end of its life. If it were to replace our Sun, it would instantly swallow Mercury, Venus, and all the way to Saturn. Not only that, but its extremely high gravity would gobble up almost all the solar system objects, and the leftovers would take over a thousand years to...

Have you ever felt like you are being pushed forward when your car brakes suddenly? This is caused by inertia. Inertia is a tendency of an object to maintain its speed. In other words, the object wants to keep a constant speed. If you push a brick along the floor (assuming there is no friction) , then the brick will go on and on and on until someone stops it. Maybe you might want to complain: But when I move bricks across the floor in real life, then why does it keep stopping? This is because there is opposing force acting on the brick known as friction. Friction is a force that is caused by rubbing 2 objects together. It can also create heat. Long time ago, people said that objects have a tendency to stop. Then, in the 1700s, Sir Isaac Newton discovered inertia and proposed that objects actually have a tendency to maintain their speed. Eventually, this is also another of Newton’s laws. I’m quite sure that I will continue to make blogs about physics, science, theo...

TRAPPIST-1 system compared to the Solar System; all seven planets of TRAPPIST-1 could fit inside the orbit of Mercury I think aliens do exist. I mean, out of the trillions and trillions of stars and planets, how can aliens not exist?  There must be some planets that are habitable out there. There is already a search for extra-terrestrial life. And there are also a lot of movies about aliens (my favorite is “Stranger Things” series). They could be even way more advanced in technology than us. They might even visit us soon. Maybe they already visited us. For children, they know the cute little green alien. But for adults, the aliens really look like an alien from another planet. They are pretty scary. Sometimes in the movies they help mankind, and sometimes they assault us. The Great Pyramid of Giza is the only Pyramid discovered to date which in fact has eight sides. The four faces of the pyramid are slightly concave, the only pyramid to have been built this way. ...

On Christmas day, I watched a movie that I really like. The movie was titled Passengers. It was a drama science fiction movie about a journey of a spacecraft called Avalon to an Earth-like planet named Homestead 2. Since the trip took 120 years, all the 5000 people aboard must be put into cryonic sleep. The sleeping pod would awaken automatically just before they arrived in destination planet. The idea is mind blowing and I wouldn’t mind to be involved in such a quest. But at thirty years, a giant asteroid crashed and destroyed the spaceship’s bow shock. Most of the equipment has been auto repaired but one cryonics capsule is still malfunctioned and the person inside awoke. At first he was confused because nobody else was awake. A robot introduced him everywhere. Then he went into the planetarium. He asked the computer: “where is homestead 2?” the computer replied:  “90 light years away” it was then he realized that he woke up too early! He lived alone for 1 year a...

This cyclist must make better friends with gravity. 9.8 meters per second is the speed of gravity. And that is also the speed that you don't like when falling from a bicycle. Of course, you don't want to try. So DON'T. And don't do anything daredevil like in the animation below.