Have you ever looked at the night sky and make shapes in the stars? Well, believe it or not those shapes are called constellations. A constellation is a group of stars that make a certain shape or object in the sky. Some constellations that you might be familiar with are Orion, the Big Dipper, and the Little Dipper. I wanted to learn more about a constellation I was not familiar with, so I will be telling you about the constellation Leo. Leo is the latin word for lion. Mesopotamian civilizations identified it as a lion about five millennia ago. In Greek mythology the constellation Leo is named after a Nemean lion. Legends say that the lion terrorized the townspeople of a city south-west of a place called Corinth. The lion had fur that was stronger than any weapons or swords. Hercules tried killing the lion with his weapons as one of his twelve labors, but it didn’t work. Hercules was a Greek and Roman hero in their mythology. Hercules then strangled and choked the lion to death. He placed the lion in the stars, therefore “creating” the constellation Leo. The constellation Leo is the twelfth largest constellation in the sky. It is located directly on the ecliptic plane. The constellation Leo occupies an area of nine hundred …show more content…
A star is created by a huge moving cloud that’s made from hydrogen and helium. Gravity pulls the cloud inward, and it gets smaller and denser. When it gets smaller it starts to spin faster. The outsides of the cloud turns into disks, and the insides turn into clumps. The material starts getting hot and dense. The cloud starts forming into a ball shaped protostar. A protostar is a big mass of gas that represents the stage before the star is actually formed. The protostar’s temperature reaches up to about one million degrees celsius. The atomic nuclei fuse together, and finally the star is formed. When more than one of these stars are grouped together to make a shape or object, a constellation is
"Leda and the Constellation Cygnus." Department of Engineering, University of Michigan. 17 February 1999 http://windows.ivv.nasa.gov/mythology/cygnus.html.
yourself in Northern California. frozen shore of Tule Lake. Now regard what sort of shape. this constellation takes a look. It sits there like a jagged scar.
Constellations have helped many people for many years. Draco the Dragon is by far the coolest constellation in the sky. The things that make draco the dragon interesting is the facts and myths.
The constellation I have chosen is Ursa Major, specifically the Big Dipper within it. Ironically, Ursa Major is my favorite because of one of its many creation stories. Ursa Major is also known as the Great Bear, and lies in the northern hemisphere. It was one of the 88 constellations first recognized by the International Astronomical Union. It is also the third largest constellation in the sky. I recognize that the Big Dipper is not a constellation, this creation story is too good to pass up sharing. I love sharing it whenever I am camping with friends and the sky is clear enough to see it. This story is of Native American orgiin.
Perseus, the twenty-forth largest constellation, is depicted as a man holding a sword in one hand and the head of Medusa in the other. Ptolemy discovered the constellation during the second century. Measuring 28 degrees in length, it lies in the Northern Hemisphere and can be seen best in December around nine o’clock P.M. It can also be seen in the Southern Hemisphere during the summer from latitudes north of negative thirty-five degrees. (Coder pp. 85 & 87, Fanshawe, Perseus Astronomer, Perseus Champion, Perseus Constellation)
As they sit today, the two stars look like a pair of eyes, the right one being Hadar and the left being Rigel Kentaurus. These two stars are considered pointer stars. A “pointer star” is a star that points towards the Southern Cross. Some of the Australian aboriginals call this pair “The two men that once were lions”. Other aboriginals consider them to be the twins that created the world.”
At Beltane the Pleiades star cluster rises just before sunrise on the morning horizon. The Pleiades is a cluster of seven closely placed stars, the seven sisters, in the constellation of Taurus, near his shoulder. When looking for the Pleiades with the naked eye, remember it looks like a tiny dipper-shaped pattern of six moderately bright star in the constellation of Taurus. It stands very low in the east-northeast sky for just a few minutes before sunrise.
Stars are born and reborn from an explosion of a previous star. The particles and helium are brought together the same way the last star was born. Throughout the life of a star, it manages to avoid collapsing. The gravitational pull from the core of the star has to equal the gravitational pull of the gasses, which form a type of orbit. When this equality is broken, the star can go into several different stages. Some stars that are at least thirty times larger than our sun can form black holes and other kinds of stars.
Solar nebula is a rotating flattened disk of gas and dust in which the outer part of the disk became planets while the center bulge part became the sun. Its inner part is hot, which is heated by a young sun and due to the impact of the gas falling on the disk during its collapse. However, the outer part is cold and far below the freezing point of water. In the solar nebula, the process of condensation occurs after enough cooling of solar nebula and results in the formation into a disk. Condensation is a process of cooling the gas and its molecules stick together to form liquid or solid particles. Therefore, condensation is the change from gas to liquid. In this process, the gas must cool below a critical temperature. Accretion is the process in which the tiny condensed particles from the nebula begin to stick together to form bigger pieces. Solar nebular theory explains the formation of the solar system. In the solar nebula, tiny grains stuck together and created bigger grains that grew into clumps, possibly held together by electrical forces similar to those that make lint stick to your clothes. Subsequent collisions, if not too violent, allowed these smaller particles to grow into objects ranging in size from millimeters to kilometers. These larger objects are called planetesimals. As planetesimals moved within the disk and collide with one another, planets formed. Because astronomers have no direct way to observe how the Solar System formed, they rely heavily on computer simulations to study that remote time. Computer simulations try to solve Newton’s laws of motion for the complex mix of dust and gas that we believe made up the solar nebula. Merging of the planetesimals increased their mass and thus their gravitational attraction. That, in turn, helped them grow even more massive by drawing planetesimals into clumps or rings around the sun. The process of planets building undergoes consumption of most of the planetesimals. Some survived planetesimals form small moons, asteroids, and comets. The leftover Rocky planetesimals that remained between Jupiter and Mars were stirred by Jupiter’s gravitational force. Therefore, these Rocky planetesimals are unable to assemble into a planet. These planetesimals are known as asteroids. Formation of solar system is explained by solar nebular theory. A rotating flat disk with center bulge is the solar nebula. The outer part of the disk becomes planets and the center bulge becomes the sun.
As stars change positions in the night sky based on the seasons, so do the constellations, and interestingly enough, there are some constellations that are unique to the northern and southern hemisphere, known as circumpolar constellations. “The Constellations (South Pole; North Pole),” engraved by W.G Evans, under the direction of Elijah H. Burritt, shows a relatively early form of illustrations of the starry heavens, reflected in the constellations viewed from the northern and southern polar regions during each month. The constellations are presented in detail, with depictions of the figures represented by the stars. The charts are quartered by lines showing the solstitial and equinoctial colures.
My favorite constellation, if I have to choose one, is Cassiopeia. Why? Because I have birthmarks on my right upperarm that look exaclty like the constellation. Also, this constellation is visible troughout the year in the Netherlands, where I live. The stars you'll find within the Cassiopeia constellation are: Schedar, Caph, Cih, Ruchbah, Segin, Achird and Marfak.
While looking in the sky at night, you try to point out the different constellation you see. Most people know the major constellations, but many do not know about the constellation Delphinus. There are many scientific and literary explanations for the constellation Delphinus.
A star begins as nothing more than a very light distribution of interstellar gases and dust particles over a distance of a few dozen lightyears. Although there is extremely low pressure existing between stars, this distribution of gas exists instead of a true vacuum. If the density of gas becomes larger than .1 particles per cubic centimeter, the interstellar gas grows unstable. Any small deviation in density, and because it is impossible to have a perfectly even distribution in these clouds this is something that will naturally occur, and the area begins to contract. This happens because between about .1 and 1 particles per cubic centimeter, pressure gains an inverse relationship with density. This causes internal pressure to decrease with increasing density, which because of the higher external pressure, causes the density to continue to increase. This causes the gas in the interstellar medium to spontaneously collect into denser clouds. The denser clouds will contain molecular hydrogen (H2) and interstellar dust particles including carbon compounds, silicates, and small impure ice crystals. Also, within these clouds, there are 2 types of zones. There are H I zones, which contain neutral hydrogen and often have a temperature around 100 Kelvin (K), and there are H II zones, which contain ionized hydrogen and have a temperature around 10,000 K. The ionized hydrogen absorbs ultraviolet light from it’s environment and retransmits it as visible and infrared light. These clouds, visible to the human eye, have been named nebulae. The density in these nebulae is usually about 10 atoms per cubic centimeter. In brighter nebulae, there exists densities of up to several thousand atoms per cubic centimete...
Stars are born in the interstellar clouds of gas and dust called nebulae that are primarily found in the spiral arms of galaxies. These clouds are composed mainly of hydrogen gas but also contain carbon, oxygen and various other elements, but we will see that the carbon and oxygen play a crucial role in star formation so they get special mention. A nebula by itself is not enough to form a star however, and it requires the assistance of some outside force. A close passing star or a shock wave from a supernova or some other event can have just the needed effect. It is the same idea as having a number of marbles on a trampoline and then rolling a larger ball through the middle of them or around the edges. The marbles will conglomerate around the path of the ball, and as more marbles clump together, still more will be attracted. This is essentially what happens during the formation of a star (Stellar Birth, 2004).
He consists of many stars, but only eight of which are major. These are the stars of Betelgeuse, Saiph, Bellatrix, Rigel, Meissa, Alnitak, Alnilam, and Mintaka. Rigel and Betelgeuse, which are found in the constellation of Orion are two of the ten brightest stars that of which we can see in our sky. Betelgeuse forms his left shoulder while Bellatrix forms his right shoulder. Orion’s head is made by one star called Meissa.