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May 2009 Tz 2
May 2009 Tz 2

... (d) Alnitak is a main sequence star with a luminosity similar to that of Antares. Use the value quoted in (c)(ii) to deduce that the mass of Alnitak is in the range 16 MS to 40 MS, where MS is the mass of the Sun. ...
Russell Diagram
Russell Diagram

... • Supergiants -- cool, bright, red, large stars • Giants -- cool, bright red, less large stars • Main Sequence -- spans range from hot, bright stars to cool, dim stars. • White dwarfs -- hot, small, dim stars. ...
Why does Sirius twinkle?
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... white dwarf star. As seen with the naked eye, Sirius can be seen to twinkle many different colors other stars for some very simple reasons. It is very bright, which can amplify atmospheric effects and it low in the winter evening sky. is also very low down in the atmosphere for those in the northern ...
lecture12
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... temperatures of stars on a scale defined by spectral types, called O B A F G K M, ranging from the hottest (type O) to the coolest (type M) stars. ...
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The Brightness of Stars
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A star by any other name - Baruch Sterman

... doesn’t look particularly impressive. Why would this relatively insignificant star be given the distinction of having such an auspicious name - The Star? The answer has to do with a phenomenon called the Precession of the Equinoxes. Our earth spins around its axis completing one revolution every day ...
1” “Sky-Notes” of the Open University Astronomy Club. June 2005. A
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... lord Rosse and others using the 72" at Birr Castle in the 19th century observed three dark rifts radiating from the centre. later visual observers confirmed these. However with the advent of photography the rifts disappeared. In the 1950's the late Walter Scott Houston in his "Sky and Telescope" col ...
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... Sometimes the nuclear furnace that powers a star gets out of control. When this happens the star blows up. Now a star is a huge thing and so when it blows up you get a huge explosion. In fact it makes the star so bright that you can sometimes see it in daylight. This is what happened in 1054 when th ...
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The Future Sun • Homework 5 is due Wed, 24 March at 6:30am
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... Follow a line from Sirius to the tip of Canis Major's nose (Theta Canis Majoris), continue nearly as far exactly straight onward, and there you are. M50 is magnitude 5.9, quite a bit fainter than M41's magnitude 4.5. In the same field with M50 is another, the fainter cluster: NGC 2343, a tougher cat ...
Sun, Stars, HR Diagram
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... Base your answers to questions 18through 20 on the diagram below, which shows two possible sequences in the life cycle of stars, beginning with their formation from nebular gas clouds in space. ...
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... The Herzsprung Russel Diagram (HRD) is a systematic way of arranging stellar data. It plots the Absolute Magnitude (MV) or Luminosity (L/L¤) versus the Spectral Type, Surface Temperature or Color. The brightest stars are at the top and the hottest stars at the left. The radius increases diagonally t ...
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... Just rising over the northeastern horizon is the constellation Perseus. Between Perseus and Cassiopeia is found one the most interesting objects to be seen through a small to medium aperture scope. The best thing is that it so easy to locate. NGC 869 & 884, popularly known as the Double Cluster, are ...
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Star Classification
Star Classification

... Most stars, including the sun, are "main sequence stars," fueled by nuclear fusion converting hydrogen into helium. For these stars, the hotter they are, the brighter. These stars are in the most stable part of their existence; this stage generally lasts for about 5 billion years. As stars begin to ...
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Lucas - WordPress.com
Lucas - WordPress.com

... Auriga is located north of the celestial equator. Its name is the Latin word for "charioteer", associating it with various mythological charioteers, including Erichthonius and Myrtilus. Auriga is most prominent in the northern Hemisphere winter sky, along with the five other constellations that have ...
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... • As Earth rotates, Ursa Major, Ursa Minor, and other constellations in the northern sky circle around Polaris • Because of this, they are called circumpolar constellations. • It appears that the constellations complete one full circle in the sky in about 24 hr. as Earth rotates on its axis. ...
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Stars

... The Blue Supergiants will begin to burn up all of the hydrogen that they have after a few million years. When this happens, the outer shell of the star begins to expand. It grows to about triple the size that it currently is. The Blue Supergiant now becomes a Supergiant. Supergiants are orange/yello ...
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Canis Major

Canis Major /ˌkeɪnɨs ˈmeɪdʒər/ is a constellation in the southern celestial hemisphere. In the second century, it was included in Ptolemy's 48 constellations, and is counted among the 88 modern constellations. Its name is Latin for ""greater dog"" in contrast to Canis Minor, the ""lesser dog""; both figures are commonly represented as following the constellation of Orion the hunter through the sky. The Milky Way passes through Canis Major and several open clusters lie within its borders, most notably M41.Canis Major contains Sirius, the brightest star in the night sky, known as the ""dog star"". It is bright because of its proximity to our Solar System. In contrast, the other bright stars of the constellation are stars of great distance and high luminosity. At magnitude 1.5, Epsilon Canis Majoris (Adhara) is the second brightest star of the constellation and the brightest source of extreme ultraviolet radiation in the night sky. Next in brightness are the yellow-white supergiant Delta (Wezen) at 1.8, the blue-white giant Beta (Mirzam) at 2.0, blue-white supergiants Eta (Aludra) at 2.4 and Omicron1 at 3.0, and white spectroscopic binary Zeta (Furud), also at 3.0. The red hypergiant VY Canis Majoris is one of the largest stars known, while the neutron star RX J0720.4-3125 has a radius of a mere 5 km.
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