Dark Matter: A Basic Understanding Introduction Many people‚ from the inquisitive‚ to those involved in the astronomical sciences have questioned the existence of Dark Matter. While it is called many things today‚ I will continue to refer to this unseen substance by its original name‚ Dark Matter. As it is still a theory being researched today to validate its existence and make-up‚ the discovery of dark matter was first presented to the world some time ago by two very intelligent astronomers
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2) What is the Milky Way galaxy and the sun’s position in it? 3) What is the Big Bang and what does it say about the age of the universe? 4) What is meant by the phase “looking out in the universe is looking back in time? b. Where are we in the universe? 1) What is Earth’s place in the solar system? 2) How close are the nearest stars to the Sun as compared to the distance between the Sun and the Earth? 3) How large is our Milky Way galaxy? 4) How many stars are estimated
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Measures of Astronomical Distances • Let’s view the Universe in terms of kilometres – The size of the observable universe is roughly 130‚000‚000‚000‚000‚000‚000‚000 km ! - Obviously measuring astronomical distances in km is inconvenient. - We need much BIGGER units of distance: • Some commonly used distance units: 1 ly (light year) = Distance traveled by light in 1 year = 9.46 trillion km 1 AU (astronomical unit) = average distance between the Sun & Earth = 150 million km A unit of distance‚
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expansion. The galaxies outside of the Milky Way galaxy are moving away from us‚ and consequently the ones farthest away are moving the fastest. “However‚ the galaxies are not moving through space‚ they are moving in space‚ because space is also moving. In other words‚ the universe has no center; everything is moving away from everything else” (The Library Of Congress‚ 2010). The Doppler effect is evidence that the universe is expanding. “In 1912‚ Slipher found that the light from all galaxies are moving
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The galaxy‚ called W2246-0526 is the most luminous galaxy known‚ which means that if all galaxies were the same distance from Earth it would appear the brightest. This galaxy was formed over a billion years ago after the Big Bang. A recent discovery shows that this galaxy is releasing tremendous amounts of turbulent gas‚ which has never been seen before from a galaxy of this kind. The galaxy is tearing itself apart‚ because the momentum of the particles of light deposited in the gas are pushing gas
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before the big bang‚ or did the big bang create time and space. As the universe expanded‚ according to scientific understanding‚ matter collected into clouds that began to condense and rotate‚ forming the forerunners of galaxies. Within galaxies‚ including our own Milky Way galaxy‚ changes in pressure caused gas and dust to form distinct clouds. In some of these clouds‚ where there was sufficient mass and the right forces‚ gravitational attraction caused the cloud to collapse. If the mass of material
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Unique Chemical Composition Surrounding Supermassive Black Holes The spiral galaxy NGC 107 was observer with ALMA‚ an astronomical interferometer of radio telescopes in the Atacama desert of northern Chile‚ an this revealed an intense emissions from dust around the central black hole in the center of NGC 107. This "Dust" was revealed to be a unique chemical composition characterized by enhancement of hydrogen cyanide (HCN) around the black hole which is possible thanks to the high temperature
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a mass 20 times more than the sun! There are many stellar black holes in Earth’s galaxy. Earth’s galaxy is called the Milky Way‚ but it’s not a candy bar! Stellar black holes aren’t the biggest‚ though! There are bigger black holes called “supermassive” black holes. These kinds of black holes have the mass of OVER A MILLION SUNS TOGETHER!!!WOW!That’s a lot of mass! Scientists have discovered proof that every galaxy has a supermassive black hole in the center! The supermassive black hole found in
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barn into Ruben’s Wingland. Everyone agreed and they colored all the paper wings and decorated the barn to Ruben’s Wing land. The next day people from across the galaxies‚ and all animals just like in Ruben’s dream came to Earth 2000 to take pictures with him and his friends and Antonio. They elected him the President of the whole galaxy. He was very happy but did not want to leave the barn. Everyone agreed and he lived happily on Ruben’s WINGLAND with his
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universe is “why don’t the galaxies fly apart when the stars circle around it?” Due to the fact that scientists were unable to explain this‚ they thought that a mysterious force must be holding the galaxies together. That mysterious force is called the Dark Matter. The third thing that fascinates scientists’ minds is how did the galaxies form? The first theory states that the galaxies collapse as single objects out of gas clouds. More and more gas falls in the galaxy because of the gravity and it
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