Galaxy

There are 100 billion stars in our galaxy alone. Space is never ending filled with countless amounts of galaxies that we cannot even begin to understand. There are so many stars and so many lives. They have different sizes and shapes and they can turn into different things after they die based on their size and shape. The exact definition of a star is a fixed luminous point in the night sky that is a large, remote incandescent body like the sun, however, stars are much more than that. Stars…

want to, but eventually people may need to go to other planets and there is a chance that it could become a huge part of life and a huge step up from where humans are today. A new galaxy has been discovered called TRAPPIST-1 which has seven Earth like planets, three of them suitable for life. If humans could get to this galaxy which is only 39 light years away, it could be a huge necessity. Most people think we should invest time and money going to Mars, to the moon, and then other planets in…

vast amount of galaxies of various shapes and sizes. A galaxy is defined as a system of millions or billions of stars with gas and dust held together by gravitational attraction. There are several types of galaxy types: elliptical, spiral and irregular. Spiral galaxies are galaxies which usually have a large mass in the middle with arms branching off of it containing stars and star systems (Swinburne University of Technology, n.d.). All of the objects orbiting the centre of the galaxy must…

like to gain knowledge regarding galaxies, black holes, and exoplanets. A galaxy is a system that contains millions of stars, gas and dust held together by gravitational attraction. A black hole is a place in space where the gravitational force is immense, making the escape of matter and radiation impossible. An exoplanet is a planet that orbits a star, other than the sun, beyond our solar system. By choosing these targets, I wish to learn about how the first galaxies were formed, why black…

understand what are galaxies like in the universe. To start off, Edwin noticed a Cepheid variable in the Andromeda Nebula which is known to astronomers as M31. For Edwin to obtain his photographs, he used Mount Wilson 100-inch telescope. Once he found his variables and determined their periods and visible magnitudes, he used a technique which is called: “Leavitt’s period-luminosity…

Laying on the fresh cut grass of your lawn, you watch the sun sink behind the mountains as day subtly fades into night. There is always a minute of darkness as the city holds its breath. No street lights. No cars. Just you and the sky and… the faint glow of a star. Seeing the first star that night, you make a wish and remember the first time you saw one. You still wonder what that speck of light is—How it got to be up there, why it sometimes is so bright and other times so faint, and how it…

discovered a galaxy without the existence of dark matter(Shelton). Dark matter cannot actually be seen or detected itself, but, as Zwicky found, it causes immense levels of gravity. This newly discovered galaxy has only the normal amount of gravity you would expect to find due to its stars, planets, and general cosmic junk, unlike every other galaxy we’ve researched, which has a much greater gravitational effect than can be attributed to the mass of the known matter in any particular galaxy.…

star. Such black holes are thought to lie at the center of pretty much every galaxy, including the Milky Way. Black holes formed by the collapse of individual stars are relatively small, but incredibly dense. Such an object packs three times or more the mass of the sun into a city-size range. This leads to a crazy amount of gravitational force pulling on objects around it. Black holes consume the dust and gas from the galaxy around them. Scientists aren't certain how such large black hole's…

If it was found out that other galaxies are not moving further, and further away from us quickly.. This would cause the Big Bang Theory too lose its credibility. Also if many other pieces of evidence were found out to be untrue , I believe this theory would lose much of its credibility. The first part of this theory, I will be discussing my main point, which is whether galaxies are moving away from us or not and at what speed. According to Hubble's law, the universe has been expanding since…

Dark matter makes up roughly 23% of the universe, and is thought to be the cause of its expansion. Dark matter was first proposed by Swiss astronomer, Fritz Zwicky when he noted that galaxies are flying away to fast. He noticed that galaxies are flying away to fast that they should fly apart, dissolve under Newtonian Laws of Motion. He thought the coma cluster may be saved if it were 100x more matter than you can see. Theres two possibilities left. Newton was wrong or something was missing.…