The power plant of the Sun and stars
... can often determine the radius of the orbit, and orbital speeds, and thus the masses of the stars From observations of binaries, we have the masses Of a sample of stars, and can study how stellar Properties depend on mass. ...
... can often determine the radius of the orbit, and orbital speeds, and thus the masses of the stars From observations of binaries, we have the masses Of a sample of stars, and can study how stellar Properties depend on mass. ...
A small mass difference between Hydrogen and Helium The
... E=mc2 c=speed of light You get a lot of bang for the buck: 6.3E+14 J/kg. This gives plenty of energy to power the Sun for 4.5 billion years plus ...
... E=mc2 c=speed of light You get a lot of bang for the buck: 6.3E+14 J/kg. This gives plenty of energy to power the Sun for 4.5 billion years plus ...
Reach_for_the_stars_final_questions.doc
... The following questions refer to the spectral sequence shown above. For questions 15 to 19 below, list the spectral type which is best described by the statement. (1 pt for each) 15. The sun is this spectral class. ______________________________________ 16. This spectral class contains the hottest s ...
... The following questions refer to the spectral sequence shown above. For questions 15 to 19 below, list the spectral type which is best described by the statement. (1 pt for each) 15. The sun is this spectral class. ______________________________________ 16. This spectral class contains the hottest s ...
formation of stars
... remain constant for billions of years. When so many of the core’s light nuclei are used up that the energy of fusion no longer balances the force of gravity the star loses its stability. When the star loses its stability the centre of the star contracts again. The core gets so hot that it causes the ...
... remain constant for billions of years. When so many of the core’s light nuclei are used up that the energy of fusion no longer balances the force of gravity the star loses its stability. When the star loses its stability the centre of the star contracts again. The core gets so hot that it causes the ...
Ch 3 Sec 1 Tools of modern astronomy
... A. More than 1/2 of all stars are in star systems – groups of 2 or more stars 1. Systems with 2 stars are binary stars a) A dark star may show itself by passing in front of the brighter star – called an eclipsing binary b) Or, the brighter star may appear to wobble, as the 2 stars pull on each other ...
... A. More than 1/2 of all stars are in star systems – groups of 2 or more stars 1. Systems with 2 stars are binary stars a) A dark star may show itself by passing in front of the brighter star – called an eclipsing binary b) Or, the brighter star may appear to wobble, as the 2 stars pull on each other ...
File
... At this station there will be pictures of blue stars. Example: The hottest stars are the blue stars. These start at temperatures of about 10,000 Kelvin, and the biggest, hottest blue supergiants can be more than 40,000 Kelvin. In fact, there’s so much energy coming off the surface of a blue star tha ...
... At this station there will be pictures of blue stars. Example: The hottest stars are the blue stars. These start at temperatures of about 10,000 Kelvin, and the biggest, hottest blue supergiants can be more than 40,000 Kelvin. In fact, there’s so much energy coming off the surface of a blue star tha ...
chapter8
... Polaris has just about the same spectral type (and thus surface temperature) as our sun, but it is 10,000 times brighter than our sun. Thus, Polaris is 100 times larger than the sun. ...
... Polaris has just about the same spectral type (and thus surface temperature) as our sun, but it is 10,000 times brighter than our sun. Thus, Polaris is 100 times larger than the sun. ...
Stars and Galaxies part 3
... 400 light-years away, and is most accurate for close stars. • FYI: Hipparcos was a satellite that operated between 1989 and 1993. Its purpose was the accurate measurement of the positions of celestial objects. This permitted the relatively accurate determination of distance to stars up to 400 light ...
... 400 light-years away, and is most accurate for close stars. • FYI: Hipparcos was a satellite that operated between 1989 and 1993. Its purpose was the accurate measurement of the positions of celestial objects. This permitted the relatively accurate determination of distance to stars up to 400 light ...
Universe 19
... reveal the different kinds of stars. • Main sequence stars – Stars in hydrostatic equilibrium found on a line from the upper left to the ...
... reveal the different kinds of stars. • Main sequence stars – Stars in hydrostatic equilibrium found on a line from the upper left to the ...
Stellar Evolution - Hays High School
... – Small low mass stars can take billions of years to form – More massive stars can completely form in a few hundred thousand years ...
... – Small low mass stars can take billions of years to form – More massive stars can completely form in a few hundred thousand years ...
Planetarium Key Points
... degree an hour, 1 deg every 4 minutes Fixed stars seem to be engraved on the surface of celestial sphere Mobile stars move along the ecliptic line from West to Est, that is their direct motion; some of them sometime move in retrograde motion from Est to West Also the Sun seems to move along th ...
... degree an hour, 1 deg every 4 minutes Fixed stars seem to be engraved on the surface of celestial sphere Mobile stars move along the ecliptic line from West to Est, that is their direct motion; some of them sometime move in retrograde motion from Est to West Also the Sun seems to move along th ...
Chapter 15 (Star Lives)
... 1. Explain in terms of its role in stellar evolution why iron is much more common than any other heavy element. 2. With one exception, which are more common on the periodic table, odd or even numbered elements? Relate this to the red giant stage of stellar evolution. 3. If practically every star mus ...
... 1. Explain in terms of its role in stellar evolution why iron is much more common than any other heavy element. 2. With one exception, which are more common on the periodic table, odd or even numbered elements? Relate this to the red giant stage of stellar evolution. 3. If practically every star mus ...
WEBDA - a tool for CP star research in open clusters
... the Milky Way and the Small Magellanic Cloud. It is intended to provide a reliable synthesis of the available data and knowledge about these objects. The success of WEBDA is documented by its worldwide usage and the related acknowledgements in the literature: more than 450 refereed publications with ...
... the Milky Way and the Small Magellanic Cloud. It is intended to provide a reliable synthesis of the available data and knowledge about these objects. The success of WEBDA is documented by its worldwide usage and the related acknowledgements in the literature: more than 450 refereed publications with ...
Lecture 13
... fusing H to He in shell outside the core … but there is no H to He fusion in the core. • All stars become larger and redder after exhausting their core hydrogen fuel: giants and supergiants. • Most stars end up small and white after all fusion has ceased: white dwarfs. • The white dwarf stage is the ...
... fusing H to He in shell outside the core … but there is no H to He fusion in the core. • All stars become larger and redder after exhausting their core hydrogen fuel: giants and supergiants. • Most stars end up small and white after all fusion has ceased: white dwarfs. • The white dwarf stage is the ...
LESSON 4, STARS
... Compare the development of a lessmassive star with that of a more-massive star. A less-massive star: begins as a nebula, becomes a protostar, a main-sequence star, a red giant, and finally, a white dwarf. A more-massive star: begins as a nebula, becomes a protostar, a main-sequence star, a ver ...
... Compare the development of a lessmassive star with that of a more-massive star. A less-massive star: begins as a nebula, becomes a protostar, a main-sequence star, a red giant, and finally, a white dwarf. A more-massive star: begins as a nebula, becomes a protostar, a main-sequence star, a ver ...
Activity: Star Classification - d
... That ball of fire also gives off all kinds of light… There are __________________, ___________________, ___________________, & X-rays constantly emitted into space. ...
... That ball of fire also gives off all kinds of light… There are __________________, ___________________, ___________________, & X-rays constantly emitted into space. ...
Space Science Distance Definitions
... Earth would produce a parallax angle much, much too small to detect. We need to use as large a baseline as possible. The largest one we can easily use is the orbit of the Earth. In this case the baseline is the distance between the Earth and the Sun - an astronomical unit (AU) or 149.6 million kilom ...
... Earth would produce a parallax angle much, much too small to detect. We need to use as large a baseline as possible. The largest one we can easily use is the orbit of the Earth. In this case the baseline is the distance between the Earth and the Sun - an astronomical unit (AU) or 149.6 million kilom ...
Stars
... the main sequence with hot, luminous stars in the upper left and cool, dim stars in the lower right. • Not all stars fall on the main sequence. Stars below the main sequence are called white dwarfs and those above it ...
... the main sequence with hot, luminous stars in the upper left and cool, dim stars in the lower right. • Not all stars fall on the main sequence. Stars below the main sequence are called white dwarfs and those above it ...
Red Giants - Uplift North Hills Prep
... • done independently by Enjar Hertzsprung and Henry Norris Russell Henry Norris Russell dissuaded Cecilia Payne-Gaposchkin from concluding that the composition of the Sun is different from that of the Earth in her papers, as it contradicted the accepted wisdom at the time. However, he changed his mi ...
... • done independently by Enjar Hertzsprung and Henry Norris Russell Henry Norris Russell dissuaded Cecilia Payne-Gaposchkin from concluding that the composition of the Sun is different from that of the Earth in her papers, as it contradicted the accepted wisdom at the time. However, he changed his mi ...
the fixed stars - The Witches` Almanac
... Some stars are glorious and helpful, while others are negative, even sinister. The fixed stars have been important since astrology’s earliest days. Fixed is something of a misnomer. The stars do move ever so slightly; however, the distance traveled over a century is barely perceptible. Alpheratz i ...
... Some stars are glorious and helpful, while others are negative, even sinister. The fixed stars have been important since astrology’s earliest days. Fixed is something of a misnomer. The stars do move ever so slightly; however, the distance traveled over a century is barely perceptible. Alpheratz i ...
The magnitudes of stars
... Two stars with a difference of 5 magnitudes would be 100 times brighter. The unaided human eye can just detect stars of magnitude six in good seeing conditions. For example: 2.5x2.5x2.5x2.5x2.5 = 2.55 = 100. [In actual fact 2.5125 = 100] A lower intensity means a greater positive number for magnitud ...
... Two stars with a difference of 5 magnitudes would be 100 times brighter. The unaided human eye can just detect stars of magnitude six in good seeing conditions. For example: 2.5x2.5x2.5x2.5x2.5 = 2.55 = 100. [In actual fact 2.5125 = 100] A lower intensity means a greater positive number for magnitud ...
Week 9 Concept Summary - UC Berkeley Astronomy w
... intrinsic luminosity and the mass: L ∝ M 4 , and the main sequence lifetime goes as t ∝ M −3 . Knowing the color of a main sequence star tells you the temperature, and uminosity, which in turn tells you the radius of the star and how far away it is. 3. Stellar Birth: Stars form out of giant gas clou ...
... intrinsic luminosity and the mass: L ∝ M 4 , and the main sequence lifetime goes as t ∝ M −3 . Knowing the color of a main sequence star tells you the temperature, and uminosity, which in turn tells you the radius of the star and how far away it is. 3. Stellar Birth: Stars form out of giant gas clou ...
Star catalogue
A star catalogue, or star catalog, is an astronomical catalogue that lists stars. In astronomy, many stars are referred to simply by catalogue numbers. There are a great many different star catalogues which have been produced for different purposes over the years, and this article covers only some of the more frequently quoted ones. Star catalogues were compiled by many different ancient peoples, including the Babylonians, Greeks, Chinese, Persians, and Arabs. Most modern catalogues are available in electronic format and can be freely downloaded from NASA's Astronomical Data Center.Completeness and accuracy is described by the weakest apparent magnitude V (largest number) and the accuracy of the positions.