parallax of the star 75 Leo is 0.10 and its apparent visual magnitude is +5.18. The absolute visual magnitude of 75 Leo is +5.14. 2. A G2 I star is larger in diameter and more luminous than the sun. 3. spectroscopic parallax can be used to determine the distance to a star when the spectrum of the star can be used to determine its spectral type and luminosity class. 4. Luminosity class IV objects are known as sub giants. 5. For stars on the main
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The changes that occur during a star ’s life are called stellar evolution. The mass of a star determines the ultimate fate of a star. Stars that are more massive burn their fuel quicker and lead shorter lives. Because stars shine‚ they must change. The energy they lose by emitting light must come from the matter of which the star is made. This will lead to a change in its composition. Stars are formed from the material between stars‚ shine until they exhaust their fuel‚ and then die a predictable
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year | | |E.1.4 |Compare the relative distances between stars within a galaxy and between galaxies‚ in terms of order of magnitude | | |E.1.5 |Describe the apparent motion of the stars/ constellations over a period of a night and over a period of a year and explain| | | |these observations in terms of the rotation and revolution of the
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in the halo of our galaxy? A) open clusters B) O and B stars C) globular clusters D) gas and dust E) all of the above Answer: C 4) What kinds of objects lie in the disk of our galaxy? A) open clusters B) O and B stars C) old K and M stars D) gas and dust E) all of the above Answer: E 5) Which of the following comprise the oldest members of the Milky Way? A) the Sun and other solar mass stars B) O stars C) red giant stars in spiral arms D) Cepheid variables E) globular clusters
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Andres Cardoso 5/12/2017 ASTM 101 Ranking Task Paper In the Doppler shift ranking task‚ astronomers measure the spectrum of electromagnetic radiation of visible and radio from celestial bodies to determine many attributes of the stars and planets. Some of the attributes that can be observed from measuring the spectrum of electromagnetic radiation are Luminosity distance and Doppler shift. “The equipment work by measuring the wavelength of absorption lines‚ where the larger absorption line means
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Constellations Nakshtras Sunsigns Planets Notable Stars Meteor Shower Galaxies‚ Dwarf Galaxies Messier Objects‚ Nebulae‚ Star Clusters etc. Field Observation Aspects • What are the references ? – Horizon – Directions – Pole Star – Some known objects (constelln) – Planetary Position • Aids / Accessories – Star Maps – Software : Stellarium‚ Celestia – Binocular & Telescopes Field Observation Aspects • Measuring Sky with Deg‚ Min & Seconds ? – Pole Star at 19 degree from horizon (Mum) – Full
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is the 10th brightest stars (11th as viewed from Earth). Hadar is a blue-white super giant in the constellation Centaurus (Cen). In about 4‚000 years‚ the motion of Alpha Centauri‚ who’s proper name is Rigel Kentaurus‚ will carry it close enough to Hadar that they will appear to be a magnificent double star. Because of the distance away from Earth that Alpha and Beta Centauri are (approximately 90 parsecs)‚ they will be an optical double. As they sit today‚ the two stars look like a pair of eyes
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has been contained in a small space. The existence of black holes was first theorized by John Mitchell in 1783. Mitchell accepted Newton’s laws of gravity and suggested that light escaping from the surface of a star would have its speed reduced due to the gravitation pull of the star‚ and therefore if a star’s gravitation pull was strong enough even light would not be able to escape.[1] Using the approximate speed of light he reasoned that if an object was approximately 500 times the mass of the
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Stars The stars making up jobs coffin or the top of Delphinus are alpha beta gamma and delta delphinus The tail is made of epsilon delphinus It is the 69th in size It is highest in the sky at 10 pm august to september Alpha delphini is a multiple star made of 7 parts A‚B‚C‚D‚E‚F‚and G A and G are the brightest Alpha delphinus is 241 lightyears away Alpha Delphini is sometimes known as Sualocin. The name was given to it by the Italian astronomer Niccolò Cacciatore. It is the Latinized version of
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BEGAN (THE "BIG BANG" THEORY) 3. LIFE-CYCLES OF THE STARS 4. ENERGY FROM THE SUN‚ & ITS EFFECTS ON US but first‚ let’s revise... The Structure of the Universe The EARTH is a PLANET. The Earth and 7 other planets (plus dwarf planets‚ moons‚ asteroids‚ comets‚ etc) are in orbit around the Sun. The SUN and all these things in orbit around it‚ make up our "SOLAR SYSTEM". Everything stays in orbit around the Sun because of gravity. The SUN is a STAR. Energy is being produced inside it‚ due to NUCLEAR
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