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  • Radiation Including Visible Light
    1,431 words
    MCW U 6 PH 3 Kate Knights Summer 2000 Observing Stars Our view of the sky at night is possible because of the emission and reflection of light. 'Light' is the better-known term for the electromagnetic spectrum, which includes waves in the visible, ultra-violet, infra-red, microwave, radio, X-ray and gamma-ray regions. The scale of the spectrum is so large that no region is distinct, several overlap each other. Each of these regions in the electromagnetic spectrum represent transverse waves, trav...
  • Neutron Stars Emit Radio Waves
    1,242 words
    Crab Nebula Looking up at the night sky you see stars lying on a never-ending dark blanket. It is within this "blanket", called the interstellar medium, that new stars are formed. The interstellar medium consists of 99% gas and about 1% dust particles. Hydrogen is the predominant gas in both atomic and molecular forms. While being the place where stars are born, the interstellar medium also creates beautiful nebulae. A reflection nebula is created when light from a nearby star reflects from the ...
  • Stars Magnitudes The Magnitude Scale
    890 words
    Stars Magnitudes The magnitude scale was invented by an ancient Greek astronomer named Hipparchus in about 150 BC He ranked the stars he could see in terms of their brightness, with 1 representing the brightest down to 6 representing the faintest. Modern astronomy has extended this system to stars brighter than Hipparchus' 1st magnitude stars and ones much, much fainter than 6. As it turns out, the eye senses brightness logarithmically, so each increase in 5 magnitudes corresponds to a decrease ...
  • Neon
    945 words
    Did you know that neon is a Greek word that means 'new'? Neon is the element that I am most interested in. I chose to do neon because I found out what many uses it has in our daily life. Neon is the element that allows you to watch TV. Without neon we would never see the cool flashing signs outside of diners and bars. In my essay I am going to tell you about neon and its many uses. First, I'm going to tell you about the history and uses of neon. Neon was discovered by Sir William Ramsay, a Scott...
  • 130 Light Years Of Earth
    417 words
    Could an exploding star have been responsible for the death of the dinosaurs? This idea has become popular again as an explanation for the disappearance of the dinosaurs. An exploding star can blast material enormous distances into space. If this material reached Earth's atmosphere, changes may have occurred that were harmful to life. We call an exploding star a supernova. Nova is the Latin word for new, and in ancient times, when an exploding star was observed, people often thought a new star w...
  • Light From Distant Stars
    576 words
    "Why is the night sky dark?" (Hi enrich) For thousands of years this question, also known as Olber's paradox, has been asked. Astronomers are constantly growing closer to the answer but still no one has yet found a finite answer. As scientists relentlessly collect data hoping to find some clue as to the answer to this riddle we seem to realize that the answer may be because of something that is too mind blowing for us to comprehend. Several explanations have been considered over the years. But a...
  • Hydrogen Stars With Spectra
    1,129 words
    STARS A star is a large celestial body composed of gravitationally contained hot gases giving off electromagnetic radiation, especially light. The sun is actually a star. Unlike the sun the stars seem to be fixed, but in fact stars are in rapid motion, but their distances are so great no relative changes can be seen with the naked eye. The sun is a typically star, with a visible surface called a photosphere, which an atmosphere of hot gases, and above them an out flowing stream of particles call...
  • Measurement Of Stellar Motions The Stars
    5,260 words
    Star, a glowing body of gases that also emits heat and other forms of energy that derive ultimately from thermonuclear reactions taking place in its interior. Stars and the vast collections of stars known as galaxies are the building blocks of the universe. Although the characteristics of individual stars vary greatly, our own sun may be described as a fairly typical star. This article deals with the nature of stars and the ways in which their properties are determined, the source of stellar ene...
  • Prominent Star Near The Nebula's Center
    693 words
    The Crab Nebula The Crab Nebula is the nearest, most conspicuous and appealing supernova remnant. In 1054, a star in the constellation of Taurus exploded in a supernova (the violent death of a star) so bright that it dominated the evening sky for more than a year. (History of the Crab Nebula) The nebula consists of the material ejected in the supernova explosion, which spreads over a volume of 10 light years in diameter, and is still expanding at a velocity of 1,800 km / sec. (Messier Object 1) ...
  • Sky The Stars
    887 words
    Astronomy Second Paper 11-27-00 I attended the Wagner College Planetarium (located in Spiro Hall) on November 15, 2000 at 11: 00 for research and to observe the stars, planets and our entire solar system more closely. There was a clear dome on the ceiling for us to see the sky. The director of the show was Dennis Anderson. He put the latitude to forty degrees, and dimmed the lights. Up in the sky the stars are beautiful and bright. They seem, by the naked eye to be moving but the earth is what i...
  • Star Collapses To Singularity And A Blackhole
    628 words
    The term blackhole is misleading, as they are not holes, but heavy, dense stellar bodies. The more dense, and massive an object, the more it warps the fabric of space-time, creating ever deepening gravity wells. These gravity wells draw in other stellar bodies, adding their mass to that of the blackhole, increasing it's gravity, and the size of what is called the event horizon. The event horizon is the distance from the singularity that the gravitational effects weaken to the point where light c...
  • Apparent Magnitude A Star
    794 words
    1. a) What is a constellation? A constellation is a group of stars that appears to form a pattern in the sky. b) What are circumpolar constellations? Give examples. They appear to move around Polaris the star located almost exactly above Earth's North Pole. Ursa Major, Ursa Minor and Cassiopeia are examples of circumpolar constellations. c) Describe and explain the apparent motions of the stars in our sky? The apparent movement of circumpolar constellations is caused by earth turning on its axis...

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