When you look into the night sky, sometimes you see small specks of light. Those tiny specks of light are actually giant exploding spheres of hydrogen and helium called stars. Many people know about stars but don't know the many interesting behind them.
1.The most common type of star is a red dwarf.
75% of stars in the Milky Way are red dwarfs. Out of the sixty stars that are closest to the sun, fifty are red dwarfs. Red dwarfs can extend their lifespan to over 100 billion years since they burn very slowly. These stars are cooler, therefore they shine less than others. Not a single red dwarf star is visible with the human eye because of their low brightness. Unlike giant stars, small red dwarfs don't explode. As they age, they get
dimmer and dimmer until they disappear. 2. The color doesn't mean what you think. Most people refer to things that are blue as cold and things that are red as hot. Stars actually are blue when they are the most hot. The coolest stars are red. As stars get hotter, the red changes to orange, yellow, white and then blue. Our sun (a yellow dwarf) is only 5,778 Kelvin, while the hottest star, Eta Carinae, is 36,000-40,000 Kelvin. In comparison, 40,000 Kelvin is about 72,000 degrees Fahrenheit.
Brown dwarfs are objects in space that sit between the lines of being a star and a planet. This object is dim and hard to distinguish from low mass stars at the early stages of the dwarf’s life. They are often called failed stars because they start their life the same way as regular stars. However, in some stage, they just didn’t have enough mass gathered to generate the fusion-powered energy of a star. Scientists are certain that brown dwarfs are the missing link between stars and planets but the formations of dwarfs are still a mystery.
Looking up at the night sky you see stars lying on a never-ending dark blanket. It is within this “blanket”, called the interstellar medium, that new stars are formed. The interstellar medium consists of 99% gas and about 1% dust particles. Hydrogen is the predominant gas in both atomic and molecular forms. While being the place where stars are born, the interstellar medium also creates beautiful nebulae. A reflection nebula is created when light from a nearby star reflects from the dust particles in the interstellar medium. There are two main types of nebulae and two other descriptions of what happens to the light that comes from nearby stars.
During this lab we utilized the HR Diagram Explorer to complete the experiments in our lab. We adjusted the different temperatures (x-axis) and luminosity (y-axis) and were able to see the stars plot on the diagram. This diagram shows the different categories of stars; Supergiants, Main Sequence, Dwarfs and the many others. The stars that where mostly plotted in the middle are the Main Sequence stars. These star make
Supernovas are explosions from old stars at the end of their life cycles. Their explosions are the largest and most energetic things in the Universe and can outshine their entire home galaxies. Supernovas can also provide beautiful viewing as well. Anyone in 1572, for a few weeks, could look up at the sky and see a bright “New star” in the sky.
The Sun is a huge, bright sphere that is mostly made up of gas that is about 5 billion years old. The Sun is the closest to the Earth, it is 145 million km distant (this distance is called an Astronomical Unit). The next closest star is 300,000 times further away. There are probably millions of similar stars in the Milky Way galaxy (and even more galaxies in the Universe), but the Sun is the most important to us because it supports life on Earth.
A white dwarf uses electron degeneracy pressure to support itself. It is because of the electron degeneracy pressure that white dwarfs have a small size relative to other types of stars.
Supernovas are extremely powerful explosions of radiation. A supernova can give off as much energy as a Sun can within its whole life. A star will release most of its material when it undergoes this type of explosion. The explosion of a supernova can also help in creating new stars.
The star Mintaka is a super-giant star that is 1,000 light- years away. The star is also 10,000 times brighter than our son. With it being the westernmost star of the belt, it is 60,000 degrees Celsius. The star Alnilam, the middle star, is also a super- giant. As close as it seems, it is actually 1,000 light years away from Earth.
One may look at the sky see the sun, stars, or even planets, but once you look through a telescope you would see more than the naked eye can uncover. For instance, Binary star is a star system consisting of two stars orbiting around their common bay center. The binary systems are made of two, four, or even more stars that are called the many star systems. These systems would often be independent for the eye as a single point of light, which can be revealed as a double or even more.
All galaxies contain star clusters. A star cluster is a group of stars held together by gravity. Open star clusters are collections of six to thousands of usually young stars. Globular clusters are ball-shaped collections of thousands to millions of very old stars. Galaxies are collections of millions to hundreds of billions of stars, planets, gas, and dust, measuring up to one hundred thousand ly across. They came in different shapes and sizes and are spread across the Universe. In the 1920’s, astronomer Edwin Hubble changed the way in which scientists view the Universe. The four types of galaxies that are categorized by shape are elliptical, spiral, lenticular, and irregular. Elliptical galaxy is a large group of stars that together make
The basic idea of star formation is gravitational collapse – the contraction of a region of gas under the influence of gravity. This is a simple process that would be expected to occur in any region of material dense enough for collisions between atoms to radiate away energy. However, the gas must be dense enough for collisions to occur and the temperature must be low enough for the atomic velocities not to be able to escape the system's gravity, so star formation only occurs in a few areas.
There so little that we know of the stars which are in the heavens which have their own story to tell. The Bible declares the heavens declare the glory of G-d. Jacob had train his children to read the signs in the heavens. Benjamin when asked by Joseph to look at the map of the stars pertaining to Egypt, Benjamin was well able to know that his brother Joseph was sitting right next to him.
Sirius also called the Dog Star or Sirius A is the brightest star in Earth's night sky. The name signifies "shining" in Greek. With a visual greatness of - 1.46, the star is outshone just by a few planets and additionally the International Space Station.2
The red stars, or the older stars, in our galaxy are located in the bulge component, which is the center of our galaxy. These Population II stars are thought to be 10 billion years old. The bulge component also contains the globular star clusters. It is estimated that our galaxy has about 200 globulars, but we know about 150. These globular clusters are consolidated toward the Galactic Center. Harlow Shapley concluded that the center of the Milky Way lies at a cpnsiderable distance in the direction of Sagittarius.
There's a snail on Pluto! No really! The scientific world feels like it's stuck in the middle of a cyclone, and I am in the very center. For many months after they first saw the satellite pictures, scientists all around the world just sat and stared and wondered. No one did anything. They couldn't find it in themselves to do something about this scientific phenomenon. Finally a Mr. William Bright decided that something needed to be done. He got managed to join scientists all over the world to come up with a solution. They decided to send me to Pluto. Me! Finnaly going into space to learn about something that might change the world forever. When Mr. Bright first asked me if I would go I was dumbfounded. How in the world was I a lowly scientist, who was barely out of Grad School, was going to learn about something that baffled the entire world! Of course I said yes. How could I not. So on January 4 2018