Cosmo: Student`s Workbook
... western world goes by a number of names. Eg The Aristotelian, the Classical, the geocentric, the Ptolmaic and the Medieval. It was a perfectly sensible model in that it satisfied the senses. The Earth was regarded as stationary and nailed in at the centre of the Universe. All heavenly bodies were th ...
... western world goes by a number of names. Eg The Aristotelian, the Classical, the geocentric, the Ptolmaic and the Medieval. It was a perfectly sensible model in that it satisfied the senses. The Earth was regarded as stationary and nailed in at the centre of the Universe. All heavenly bodies were th ...
Life on the Main Sequence + Expansion to Red Giant
... Mmax ~ 100 solar masses a) More massive clouds fragment into smaller pieces during star formation. ...
... Mmax ~ 100 solar masses a) More massive clouds fragment into smaller pieces during star formation. ...
Lecture 14 - Center for Astrophysics and Space Astronomy CASA
... We now see a dozen or so every year in distant galaxies. ...
... We now see a dozen or so every year in distant galaxies. ...
Interferometric Doppler Imaging of Chemically Peculiar stars
... unique and complementary data for understanding star and planet formation. The techniques will probe the innermost regions protoplanetary disks and will enable diameter measurements of stars still contracting to the ...
... unique and complementary data for understanding star and planet formation. The techniques will probe the innermost regions protoplanetary disks and will enable diameter measurements of stars still contracting to the ...
Measuring Stars
... In principal stellar temperature can be estimated by its color and the peak of the spectrum. But due to absorption lines and bands in the spectrum it could get complicated. Spectral lines in the spectrum provide a additional information about the temperature of a star. Absorption line strength in a ...
... In principal stellar temperature can be estimated by its color and the peak of the spectrum. But due to absorption lines and bands in the spectrum it could get complicated. Spectral lines in the spectrum provide a additional information about the temperature of a star. Absorption line strength in a ...
The First Stars in the Universe - Scientific American
... We call this event the cosmic renaissance. Although astronomers cannot yet estimate how much of the gas in the universe condensed into the first stars, even a fraction as small as one part in 100,000 could have been enough for these stars to ionize much of the remaining gas. Once the first stars sta ...
... We call this event the cosmic renaissance. Although astronomers cannot yet estimate how much of the gas in the universe condensed into the first stars, even a fraction as small as one part in 100,000 could have been enough for these stars to ionize much of the remaining gas. Once the first stars sta ...
word document - FacStaff Home Page for CBU
... _____ f) Vega is a star that has a stellar classification of A0 V. From this we can infer that Vega is more massive than the sun. _____ g) The heaviest elements (gold, lead, uranium, etc.) are thought to be made in supernova explosions and not in the interior of stars like carbon and oxygen are. ___ ...
... _____ f) Vega is a star that has a stellar classification of A0 V. From this we can infer that Vega is more massive than the sun. _____ g) The heaviest elements (gold, lead, uranium, etc.) are thought to be made in supernova explosions and not in the interior of stars like carbon and oxygen are. ___ ...
Black Hole
... Appearance of a bright star in our Milky Way galaxy. It took almost eight months to fade away from the sky. It sparkled like a star in the sky. Today we know it was a `Supernova'. ...
... Appearance of a bright star in our Milky Way galaxy. It took almost eight months to fade away from the sky. It sparkled like a star in the sky. Today we know it was a `Supernova'. ...
What is a Star?
... Small Stars- The Life of a Star of about one Solar Mass. Stage 1- Stars are born in a region of high density Nebula, and condenses into a huge globule of gas and dust and contracts under its own gravity. ...
... Small Stars- The Life of a Star of about one Solar Mass. Stage 1- Stars are born in a region of high density Nebula, and condenses into a huge globule of gas and dust and contracts under its own gravity. ...
Spectropolarimetric view of the lower atmosphere of
... II - Sciences et techniques, IN2P3 – Université de Montpellier II Place Eugène Bataillon - CC 72 34095 Montpellier Cédex 05, France ...
... II - Sciences et techniques, IN2P3 – Université de Montpellier II Place Eugène Bataillon - CC 72 34095 Montpellier Cédex 05, France ...
STARS
... and brighter. Others are smaller, less massive, and less bright. Some stars are single like the Sun. Others have one or several companion stars. Some stars are much older than the Sun. Others have been formed very recently. ...
... and brighter. Others are smaller, less massive, and less bright. Some stars are single like the Sun. Others have one or several companion stars. Some stars are much older than the Sun. Others have been formed very recently. ...
16. Properties of Stars
... The largest stars are in the upper right corner of the HR Diagram. Note that Absolute Magnitude is a measure of the Luminosity of the Star Apparent visual Magnitude is a measure of the Apparent Brightness (or Intensity) of the starlight reaching the observer. ...
... The largest stars are in the upper right corner of the HR Diagram. Note that Absolute Magnitude is a measure of the Luminosity of the Star Apparent visual Magnitude is a measure of the Apparent Brightness (or Intensity) of the starlight reaching the observer. ...
astrocoursespring2012lec2-6
... Stellar classification is a classification of stars based on their spectral characteristics. The spectral classof a star is a designated class of a star describing the ionization of its chromosphere, what atomic excitations are most prominent in the light, giving an objective measure of the temperat ...
... Stellar classification is a classification of stars based on their spectral characteristics. The spectral classof a star is a designated class of a star describing the ionization of its chromosphere, what atomic excitations are most prominent in the light, giving an objective measure of the temperat ...
Jeans Length
... N molecules of mass m in box of size L at temp T. • Gravitational Energy: EG ~ G M M L ...
... N molecules of mass m in box of size L at temp T. • Gravitational Energy: EG ~ G M M L ...
AST 301 Introduction to Astronomy - University of Texas Astronomy
... It will fuse about 0.1 Msun of its hydrogen into helium while on the main sequence. How long can it stay on the main sequence? Spica has a luminosity 10,000 times that of the Sun. How does the amount of hydrogen it fuses in a year compare to the amount the Sun fuses? Spica has a mass of 14 Msun, and ...
... It will fuse about 0.1 Msun of its hydrogen into helium while on the main sequence. How long can it stay on the main sequence? Spica has a luminosity 10,000 times that of the Sun. How does the amount of hydrogen it fuses in a year compare to the amount the Sun fuses? Spica has a mass of 14 Msun, and ...
July - astra
... cury, Venus, Mars, Jupiter and Saturn. Venus is extremely bright Open clusters reside in our Milky Way Galaxy. Our Sun is no and hugs close to the Sun, so you see it for a short time in the longer in its group. west after sunset or in the east before sunrise. Jupiter can be out Globular Clusters loo ...
... cury, Venus, Mars, Jupiter and Saturn. Venus is extremely bright Open clusters reside in our Milky Way Galaxy. Our Sun is no and hugs close to the Sun, so you see it for a short time in the longer in its group. west after sunset or in the east before sunrise. Jupiter can be out Globular Clusters loo ...
CHAP
... - Cool stars appear _________ in color with a surface temperature of about 3,200 degrees Celsius. - Warm stars appear _____________ in color with a surface temperature of about 5,500 degrees Celsius. - The hottest stars are ____________ in color and have a surface temperature over 20,000 degrees Cel ...
... - Cool stars appear _________ in color with a surface temperature of about 3,200 degrees Celsius. - Warm stars appear _____________ in color with a surface temperature of about 5,500 degrees Celsius. - The hottest stars are ____________ in color and have a surface temperature over 20,000 degrees Cel ...
In Pictures: Journey to the Stars
... are many more in the universe. But did you know that a long, long time ago, there were no stars at all? Gravity is the force of attraction between all objects in the © AMNH ...
... are many more in the universe. But did you know that a long, long time ago, there were no stars at all? Gravity is the force of attraction between all objects in the © AMNH ...
Positions in the Solar System
... The Universe contains billions of galaxies, each containing millions or billions of stars. Therefore, the galaxy in which our solar system and essentially all of us live, is just one of ...
... The Universe contains billions of galaxies, each containing millions or billions of stars. Therefore, the galaxy in which our solar system and essentially all of us live, is just one of ...
Slide 1
... The Universe contains billions of galaxies, each containing millions or billions of stars. Therefore, the galaxy in which our solar system and essentially all of us live, is just one of ...
... The Universe contains billions of galaxies, each containing millions or billions of stars. Therefore, the galaxy in which our solar system and essentially all of us live, is just one of ...
The Stars - University of Redlands
... How massive are stars? • Kepler’s Laws – devised for the planets. • Apply to any object that orbits another object. ...
... How massive are stars? • Kepler’s Laws – devised for the planets. • Apply to any object that orbits another object. ...
HR-Diagram
... This time there is so much energy because of the large mass of the outer star that the collapse causes a Super Nova Explosion. NOW…if the CORE of the star has a mass of 3x or less the size of the sun ( but has a much smaller diameter than the sun) it creates a Neutron Star which spins and emits a st ...
... This time there is so much energy because of the large mass of the outer star that the collapse causes a Super Nova Explosion. NOW…if the CORE of the star has a mass of 3x or less the size of the sun ( but has a much smaller diameter than the sun) it creates a Neutron Star which spins and emits a st ...
Astronomy of the Northern Sky—
... should make this a target for a night-time stellar-evolution lesson any time it is visible. The top part of the п-shaped constellation, centered on its brightest star, α, is in fact an OB association, a group of hot, young stars traveling in space together but not gravitationally bound enough to mai ...
... should make this a target for a night-time stellar-evolution lesson any time it is visible. The top part of the п-shaped constellation, centered on its brightest star, α, is in fact an OB association, a group of hot, young stars traveling in space together but not gravitationally bound enough to mai ...
CHARACTERISTICS OF STARS
... looks from Earth depends on both its distance and how bright the star actually is. The brightness of a star can be described in 2 different ways: apparent brightness and absolute brightness. A star’s apparent brightness is its brightness as seen from Earth. Astronomers can measure apparent brightnes ...
... looks from Earth depends on both its distance and how bright the star actually is. The brightness of a star can be described in 2 different ways: apparent brightness and absolute brightness. A star’s apparent brightness is its brightness as seen from Earth. Astronomers can measure apparent brightnes ...
Astronomy 1001/1005 Final Exam (250 points)
... You will NOT get your bubble sheet back One page of notes is allowed Use a #2 pencil on the bubble sheet. Make your bubbles dark and neat. There are 50 multiple choice problems and your choice of 5 short answer questions with point values given for each. ...
... You will NOT get your bubble sheet back One page of notes is allowed Use a #2 pencil on the bubble sheet. Make your bubbles dark and neat. There are 50 multiple choice problems and your choice of 5 short answer questions with point values given for each. ...
H II region
An H II region is a large, low-density cloud of partially ionized gas in which star formation has recently taken place. The short-lived blue stars forged in these regions emit copious amounts of ultraviolet light that ionize the surrounding gas. H II regions—sometimes several hundred light-years across—are often associated with giant molecular clouds. The first known H II region was the Orion Nebula, which was discovered in 1610 by Nicolas-Claude Fabri de Peiresc.H II regions are named for the large amount of ionised atomic hydrogen they contain, referred to as H II, pronounced H-two by astronomers (an H I region being neutral atomic hydrogen, and H2 being molecular hydrogen). Such regions have extremely diverse shapes, because the distribution of the stars and gas inside them is irregular. They often appear clumpy and filamentary, sometimes showing bizarre shapes such as the Horsehead Nebula. H II regions may give birth to thousands of stars over a period of several million years. In the end, supernova explosions and strong stellar winds from the most massive stars in the resulting star cluster will disperse the gases of the H II region, leaving behind a cluster of birthed stars such as the Pleiades.H II regions can be seen to considerable distances in the universe, and the study of extragalactic H II regions is important in determining the distance and chemical composition of other galaxies. Spiral and irregular galaxies contain many H II regions, while elliptical galaxies are almost devoid of them. In the spiral galaxies, including the Milky Way, H II regions are concentrated in the spiral arms, while in the irregular galaxies they are distributed chaotically. Some galaxies contain huge H II regions, which may contain tens of thousands of stars. Examples include the 30 Doradus region in the Large Magellanic Cloud and NGC 604 in the Triangulum Galaxy.