CONSTELLATION CEPHEUS, KING OF ETHIOPIA Cepheus is a
... Cepheus is a constellation in the northern sky. It is named after Cepheus, King of Aethiopia in Greek mythology. He was deemed worthy of a place in the sky because he was fourth in descent from the nymph Io, one of the loves of Zeus – and having Zeus as a relative was always an advantage when it cam ...
... Cepheus is a constellation in the northern sky. It is named after Cepheus, King of Aethiopia in Greek mythology. He was deemed worthy of a place in the sky because he was fourth in descent from the nymph Io, one of the loves of Zeus – and having Zeus as a relative was always an advantage when it cam ...
Quasars- The Brightest Black Holes
... Universe, there is a direct relationship (established in the late 1920’s as Hubble’s law) between the speed with which a cosmic object is receding and its distance away from us – the further objects move away faster. 3C273’s redshift indicated that this ‘star’ was two and a half billion light-years ...
... Universe, there is a direct relationship (established in the late 1920’s as Hubble’s law) between the speed with which a cosmic object is receding and its distance away from us – the further objects move away faster. 3C273’s redshift indicated that this ‘star’ was two and a half billion light-years ...
Building the Hertzsprung
... What would be the lifetime of a star one tenth as massive as our sun? A: 1 billion years = 109 years B: 10 billion years = 1010 years C: 100 billion years = 1011 years D: 1 trillion years = 1012 years ...
... What would be the lifetime of a star one tenth as massive as our sun? A: 1 billion years = 109 years B: 10 billion years = 1010 years C: 100 billion years = 1011 years D: 1 trillion years = 1012 years ...
Powerpoint slides
... We now have fifteen school buses stuffed with sprinkles. What do we do with them? Where do we put all the sprinkles? If each star is the size of a sprinkle…and each solar system the size of a cookie…the entire Milky Way galaxy will be the size of North America, a very flat disc 2500 miles across and ...
... We now have fifteen school buses stuffed with sprinkles. What do we do with them? Where do we put all the sprinkles? If each star is the size of a sprinkle…and each solar system the size of a cookie…the entire Milky Way galaxy will be the size of North America, a very flat disc 2500 miles across and ...
8.1 Radio Emission from Solar System objects
... young stars that are ejecting matter in the form of minor jets. Most of the strong radio emission comes from stars that are either very young or very old. When stars form they go through phases of mass ejection and interaction with the surrounding medium. One such example are HII regions. These are ...
... young stars that are ejecting matter in the form of minor jets. Most of the strong radio emission comes from stars that are either very young or very old. When stars form they go through phases of mass ejection and interaction with the surrounding medium. One such example are HII regions. These are ...
Evolution of Warm Debris Around Sun-like Stars: Clues to Terrestrial
... runaway process. The final stage, chaotic growth is characterized by high velocity collisions between the few remaining large bodies in the system. ...
... runaway process. The final stage, chaotic growth is characterized by high velocity collisions between the few remaining large bodies in the system. ...
Astronomy 112: The Physics of Stars Class 1 Notes: Observing Stars
... nearest star to us is Proxima Centauri, which has a parallax of 0.88” – to put this in perspective, this corresponds to the size of a quarter at a distance of half a kilometer. As a result of this difficulty, the first successful use of parallax to measure the distance to a star outside the solar sy ...
... nearest star to us is Proxima Centauri, which has a parallax of 0.88” – to put this in perspective, this corresponds to the size of a quarter at a distance of half a kilometer. As a result of this difficulty, the first successful use of parallax to measure the distance to a star outside the solar sy ...
The Birdseed Galaxy - Secondary Education
... Milky Way Galaxy.) Ask students to take a minute and compare this to their own estimates. 4. The Distribution of Stars in the Galaxy Now, to complete our model, we need to put those birdseeds not on a football field, but scattered around North America. How will they be scattered? Not evenly, since t ...
... Milky Way Galaxy.) Ask students to take a minute and compare this to their own estimates. 4. The Distribution of Stars in the Galaxy Now, to complete our model, we need to put those birdseeds not on a football field, but scattered around North America. How will they be scattered? Not evenly, since t ...
PHYS3380_102815_bw - The University of Texas at Dallas
... relativity using eclipse observations. - Eddington limit is likely reached around 120 solar masses, at which point a star starts ejecting its envelope through intense solar wind. - Wolf-Rayet stars are massive stars showing Eddington limit effects, ejecting .001% of their mass through solar wind per ...
... relativity using eclipse observations. - Eddington limit is likely reached around 120 solar masses, at which point a star starts ejecting its envelope through intense solar wind. - Wolf-Rayet stars are massive stars showing Eddington limit effects, ejecting .001% of their mass through solar wind per ...
astronomy practice test ch 9
... 21. The 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 ____________________. 22. ____________________ can be used to determine the distance to a star when the spectrum of the star can be used to determine its spectral type ...
... 21. The 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 ____________________. 22. ____________________ can be used to determine the distance to a star when the spectrum of the star can be used to determine its spectral type ...
Binocular Universe: Summer`s Swan Song
... stars poking through. That was still enough to earn NGC 6910 a place in the Astronomical League’s Binocular Deep Sky Club. Our next stop, NGC 6819, is nestled about 8° west of Sadr and is also a member of the Binocular Deep Sky Club. Shining at 7th magnitude and spanning just 5 arcminutes, this litt ...
... stars poking through. That was still enough to earn NGC 6910 a place in the Astronomical League’s Binocular Deep Sky Club. Our next stop, NGC 6819, is nestled about 8° west of Sadr and is also a member of the Binocular Deep Sky Club. Shining at 7th magnitude and spanning just 5 arcminutes, this litt ...
Life and Death of Stars - UM Research Repository
... Death of Stars: The last stage in stars life cycles or the way it finally dies depends on its mass. Low massed stars from Red giant stage turns to Planetary Nebula when outer parts drifted off into space and cool down. They are not able to fuse carbon or heavier elements into their cores and ended t ...
... Death of Stars: The last stage in stars life cycles or the way it finally dies depends on its mass. Low massed stars from Red giant stage turns to Planetary Nebula when outer parts drifted off into space and cool down. They are not able to fuse carbon or heavier elements into their cores and ended t ...
The Origin, Structure, and Evolution of the Stars
... stars differ enormously in their sizes and also in the amount of energy they radiate A significant question of physical makeup of stars arises what is the most fundamental physical difference between the low luminosity red stars of the main sequence and the high luminosity blue stars of the upper ma ...
... stars differ enormously in their sizes and also in the amount of energy they radiate A significant question of physical makeup of stars arises what is the most fundamental physical difference between the low luminosity red stars of the main sequence and the high luminosity blue stars of the upper ma ...
mass loss of massive stars - of /proceedings
... usually classified as Luminous Blue Variables (LBV). As stems from their name, such objects show a variety of variable patterns, both photometrically and spectroscopically. There are two main groups of LBVs. The first one is made of stars showing photometric modulation of the order 1 to 2 magnitudes ...
... usually classified as Luminous Blue Variables (LBV). As stems from their name, such objects show a variety of variable patterns, both photometrically and spectroscopically. There are two main groups of LBVs. The first one is made of stars showing photometric modulation of the order 1 to 2 magnitudes ...
THE GALACTIC GAZETTE The Astronomical Society of Southern New England Next Meeting
... Today, the highest-mass stars top out at about 100 solar masses (Eta Carinae, one of the most massive stars in our Milky Way galaxy, is about 90). But recent cosmological simulations suggest the possibility that in the early universe truly gargantuan stars could exist. So Chen began exploring this w ...
... Today, the highest-mass stars top out at about 100 solar masses (Eta Carinae, one of the most massive stars in our Milky Way galaxy, is about 90). But recent cosmological simulations suggest the possibility that in the early universe truly gargantuan stars could exist. So Chen began exploring this w ...
memphis astronomical society short course in astronomy 2015
... If you would like to take the test, it is recommended that you prepare for it. It is not a particularly difficult test, but you are expected to know most of the important concepts in astronomy. You should not feel that the test is like a final exam in an astrophysics course, but if you pass it, you ...
... If you would like to take the test, it is recommended that you prepare for it. It is not a particularly difficult test, but you are expected to know most of the important concepts in astronomy. You should not feel that the test is like a final exam in an astrophysics course, but if you pass it, you ...
Astronomical Spectra
... – Combination of quantum mechanical and electromagnetic effects: Ions are bombarded by transient electric and magnetic fields of high speed electrons zipping nearby, these electric fields split and shift the energy levels. This constant perturbation within the plasma environment depends most strongl ...
... – Combination of quantum mechanical and electromagnetic effects: Ions are bombarded by transient electric and magnetic fields of high speed electrons zipping nearby, these electric fields split and shift the energy levels. This constant perturbation within the plasma environment depends most strongl ...
spectral lines as distant measurement tools
... Stars to the right have red appearance, to the left they are blue. The stellar brightness is measured as “photographic magnitude”, an inverted logarithmic scale for the amount of light received from different stars if they were all placed at the same distance. The diagram is not filled randomly, but ...
... Stars to the right have red appearance, to the left they are blue. The stellar brightness is measured as “photographic magnitude”, an inverted logarithmic scale for the amount of light received from different stars if they were all placed at the same distance. The diagram is not filled randomly, but ...
Globular Clusters
... scope. Dimmer than similar globs M55 or M12, but near the Class 1 NGC 2801 for a comparison. Best at 7:30pm. Gets quite low later. M10 & M12 in Ophiuchus are about the same distance and brightness (6.6), but M12 is Class IX, broadly concentrated with a lower surface brightness than M10. M10 is Class ...
... scope. Dimmer than similar globs M55 or M12, but near the Class 1 NGC 2801 for a comparison. Best at 7:30pm. Gets quite low later. M10 & M12 in Ophiuchus are about the same distance and brightness (6.6), but M12 is Class IX, broadly concentrated with a lower surface brightness than M10. M10 is Class ...
Stellar and emission line spectra
... centre outwards, approaching the interstellar density far out from the star. The radius of a star is merely a matter of definition. Fortunately, there is a sharp transition region in stars that can serve as the defining radius, and that is the photosphere. The photosphere is the region where the sta ...
... centre outwards, approaching the interstellar density far out from the star. The radius of a star is merely a matter of definition. Fortunately, there is a sharp transition region in stars that can serve as the defining radius, and that is the photosphere. The photosphere is the region where the sta ...
Homework
... A newspaper article reported that astronomers claim people are made of stardust. What does this mean? Pick the answer that best matches what you think “being made of stardust” means. a. “Being made of stardust” is not intended to be taken literally. It means that nobody really knows where atoms come ...
... A newspaper article reported that astronomers claim people are made of stardust. What does this mean? Pick the answer that best matches what you think “being made of stardust” means. a. “Being made of stardust” is not intended to be taken literally. It means that nobody really knows where atoms come ...
Star Birth - Sierra College Astronomy Home Page
... that of a planet and 0.08 MSun. • The spectral classification of a brown dwarf is T and these objects are sometimes called T dwarfs with a surface temperature of less than 1400 K • L dwarfs include brown dwarfs and hydrogen-burning stars with surface temperatures of 1400-2200 K © Sierra College Astr ...
... that of a planet and 0.08 MSun. • The spectral classification of a brown dwarf is T and these objects are sometimes called T dwarfs with a surface temperature of less than 1400 K • L dwarfs include brown dwarfs and hydrogen-burning stars with surface temperatures of 1400-2200 K © Sierra College Astr ...
Stellar Evolution
... This outline of stellar formation and extinction can be compared to observations of star clusters; here a globular cluster: ...
... This outline of stellar formation and extinction can be compared to observations of star clusters; here a globular cluster: ...
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.