Good morning 10F and Dr Guppy‚ I will be speaking about an astronomical phenomenon called black holes. A black hole is an area of space-time. Rather‚ it is a great amount of matter packed into a very small region it is also the last evolutionary stage in the lifetimes of vast stars. This makes the black hole invisible to the rest of the universe‚ hence the word "black". A star‚ about 20 times the mass of the sun may produce a black hole at the end of its life. A black hole is formed by nuclear reactions
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Most scientists think that our solar system was made from a nearby star‚ called the supernova. These scientists believe that the explosion of the supernova squeezed a nearby cloud of dust‚ causing it to collapse. When the gravity gathered the dust together‚ it formed something called a solar nebula. Soon‚ the cloud became hotter‚ a disk of gas surrounding it. Molecules gathered in a clump as the disk got smaller. Scientists believe in this theory using technology. They used this technology to observe
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Title: Plate depicting the story of Perseus and Andromeda (1524) Artist: Nicola da Urbino Collection: Italian Renaissance This plate illustrates the story of the valiant hero Perseus (a demigod) as he saves the princess Andromeda from a sea monster. The greek myth says that Andromeda’s mother had said that her daughter’s beauty was greater than that of Poseidon’s companions. An angry Poseidon‚ sent off a sea monster to their land. The plate shows Andromeda chained up to a tree‚ the sea monster at her
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In the beginning there was chaos and Orana‚ the goddess of the sun‚ was born. She is the ruler who formulated what is now known as the core of the earth. She gathered many stars and crushed them together to create a glowing rock-like sphere. Orana then decided to have the core revolve around her so she could watch her creation. While doing this she ran into Lunasta‚ god of the moon. Lunasta moved the moon to have it revolve around the core too. So instead Orana and Lunasta decided to put the sun
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Term paper outline-Death of stars http://www.space.com/6638-supernova.html http://en.wikipedia.org/wiki/Stellar_evolution Abstract (summar of paper) When observing a star‚ the lager it is the shorter its life is going to be. The smaller it is the longer the life. Shorter life is not saying much though‚ as the most massive stars live for billions of years. When a star reaches about middle age‚ it starts fusing hydrogen into helium. Once it has run out of usable hydrogen that it can convert
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The Large Hadron Collider – Will the findings benefit humankind? The Large Hadron Collider (LHC) is the world’s most powerful particle accelerator. The LHC project started on 10 September 2008 and is made up of a 27-kilometer ring of superconducting magnets‚ with accelerating structures that help boost the energy of particles along the way of the magnet. The LHC was built in collaboration of 10 000 scientists and engineers from 100 countries. The LHC can be found in a 27-kilometer tunnel (in circumference)
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Protostar This is the stage in which the star begins to form after the collapse of the interstellar cloud. It happens in small molecular clouds that can be referred to as dense cores. In the beginning the dense core has a level of balance between its own gravitational forces (self-gravity)‚ and both the magnetic pressure‚ and gas pressure. The self-gravity acts to compress the dense core‚ while the gas‚ and magnetic pressures act to inflate it. The core’s self-gravity will eventually overwhelm it
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Introduction In order to further understand the relationship between temperature‚ radiation‚ and energy output we conducted a black body experiment in order to experimentally confirm the Stefan-Boltzmann constant. A black body is an object which allows all entering radiation‚ without reflection‚ to enter the object‚ absorbs all of the radiation‚ and subsequently releases radiation based on its own constant temperature. Another key factor is this absorption happens at all various wavelengths and
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The world we live in today is far more complex and variegated‚ compared to past civilizations and cultures. As time passed‚ the world population increased and a variety of completely diverse cultures formed. Even though some cultures are completely different‚ every single one of them has two things in common‚ a past history and some form of a belief system. Among all of the cultures in this world‚ one of the most unique and fascinating are the Native Americans. The ancestors of today’s Native Americans
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The Perseid Meteor Shower (pur-see-id) is one of the most famous meteor showers. This is not only because of the exceedingly high amount of meteors‚ but also due to its lengthy appearance in the night sky. The Perseids can occupy the sky for up to six weeks between the middle of July and the end of August. The Perseids can be seen when Earth passes through Comet Swift-Tuttle‚ however‚ the most meteors will be visible when Earth passes through the densest‚ dustiest area of Swift-Tuttle. The
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