Oh! and there are stunning nebulae plentiful With blazing fireballs on a milky way background.…
A spiral galaxy is a certain kind of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae and, as such, forms part of the Hubble sequence. Spiral galaxies consist of a flat, rotating disc containing stars, gas and dust, and a central concentration of stars known as the bulge.(Sloan) Spiral galaxies resemble spiraling pinwheels, nearly 77% of space consists of spiral galaxies. Though the stars and other visible material contained in such a galaxy lie mostly on a plane, the majority of mass in spiral galaxies exists in a roughly spherical halo of dark matter that extends beyond the visible component, as demonstrated by the universal rotation curve concept. In the Hubble classification scheme: Spiral galaxies…
Next, the core contracts as the outer layers expand. This is leading to the explosion of stars eventually becoming a planetary nebula or supernova,…
Planets and the stars have always fascinated me. Finding out how they were discovered is fascinating. We know that William Hershcel discovered the planet Uranus in 1781. But, how did it happen? He was using his telescope to check for “’double stars’—two stars that are so close together that, without proper magnification, they look like one star”.…
There are many spectacular events that happen in the universe. Some events are as common and simple as a sunrise in the morning or the northern lights dancing across the night sky. Other events are less common and hold a beautiful mystic to them like a comet streaking across the sky. Of all the magnificence spectacles that occur in the universe, there are not many that equal the power or beauty of a supernova. Supernovas occur at the end of the star’s life cycle as the star depletes its fuel.…
The ultimate space book By Nathan Deline The ultimate space book The big bang 1. The big bang happened 13.8 million years ago 2.…
The Hertzsprung-Russell diagram shows the distribution of stars depending on their stage of evolution. In this diagram, the temperature and spectral class of the star (on the x-axis), depending on the spectral characteristics of it, are plotted against the absolute magnitude (on the y-axis) $(cf.\cite{basu2003introduction}, p.84)$. The diagram can be divided into eight different regions with different luminosity classes in the Morgen-Keenan system, which are The process of star formation can be illustrated in the Hertzsprung-Russell diagram and can be divided in different stages of formation.…
Solar cores of high temperatures, generate energy quicker, therefore higher temperature stars are more luminescent. Stars located on the main sequence, referred to as “dwarfs”, must generate power through hydrogen and helium nuclear fusion in their solar core and be in thermal equilibrium, the balance between luminosity and energy generation, and hydrostatic equilibrium, equality between pressure and gravity. Following the mass-luminosity relationship, hot, bright and high mass stars are located on the upper left, ranging in temperatures from roughly 2 x 104 to 4 x104 Kelvin and a luminosity of approximately 104 solar units. The upper main sequence stars have a mass greater than 1.5 solar masses and generate energy by solely nuclear fusion involving hydrogen and helium. Their internal structure is generally a convective core and a radiative envelope.…
Aaminah Azhar Astrobiology Spring 2015 Test 1 1. Name and describe five important steps in the formation of planets based on our current scientific understanding. a) Star and planet formation starts inside a collapsing cloud of gas and dust inside a bigger cloud called a nebula. Because of gravity pulling materials in the collapsing cloud closer together, the center of the cloud gets increasingly more compressed and because of this get hotter.…
Stars are self luminous, spheroidal body of great mass that produces energy and are held together by their own gravity. They are located all over the galaxy. Some are more prominent in the night sky and those usually make it into constellations. Although they look the same from earth, all stars are different. Some can be 250 times bigger than the sun and some can be 250 times smaller.…
Scientists believe that stars are made of mostly gas, and this gas is made up of many atoms. In the star, the atoms in the gas bang into each other and give off different light depending on the type of atoms. This light from stars enables scientists to figure out the type and amount of atoms they are made of. Knowing the composition of the stars, we can guess how they were formed. Therefore we can see that stars are just atoms (hydrogen) hitting each other producing light.…
A large amount of this mass is hypothesised to be in the form of approximately twenty hot, young massive stars up to 200 times the mass of our own sun in addition to other smaller stars. At the core of the nebula, the total output energy that makes the nebula glow in the form of absorbed ultraviolet radiation, exceeds fifty million times the output energy that our humble sun is capable of emitting. (Gribbin & Goodwin 1997, p. 86)…
The nuclear reactions at the core of the star provide the star with sufficient energy to shine for many years ( name of author ). The amount of time that it takes for a star's light to reach earth depends on the location of the star. Usually the farther away the star the more dim its light would be and the closer the start results in a brighter and stronger light. For example the sun is 92.96 million miles from earth and its light travels 186,000 miles per second ( name of author). As a result of the speed of its light and its distance it takes a total of 8 minutes for the sunlight to reach earth.…
Also, the Solar Nebula Theory lab showed how stars are made. Dust from nebula’s are pulled together from gravity and start fusing together,…
They arise from the core collapse of massive stars which reside in regions of space experiencing new and active star formation (Savaglio, 2013) and as they are intensely luminous and high in both gamma-ray emission and multi-wavelength afterglow their rate is relative to the star formation rate (Gehrels & Meszaros 2012). However, the core collapse from a supernova explosion from the death of a star that results in the formation of a neutron star is not powerful to create or explain LGRBs. Instead, a LGRB can only be explained as arising when an ultra-energetic supernova becomes a hypernova and creates a black hole that consumes matter so immediately that it releases a substantial amount of energy of the matter which is not consumed (Bennett et al., 2014). The fundamental physics of this collapse of a star and was first proposed and developed by University of California physicist Dr. Stanford Woosley and his Collapsar Model remains the leading explanation for LGRBs today (Taboada,…