SIERRA STAR GAZERS
... original mass at least eight times that of our Sun. As the fusion process eventually progressed to the element, Iron, all fusion stopped, gravity took over, and in seconds, the star collapsed into a sphere approximately 10 km across. The blast destroyed the star and spewed its remains outward into d ...
... original mass at least eight times that of our Sun. As the fusion process eventually progressed to the element, Iron, all fusion stopped, gravity took over, and in seconds, the star collapsed into a sphere approximately 10 km across. The blast destroyed the star and spewed its remains outward into d ...
A time travel of 14 billion years
... galaxies are moving away from us with a speed proportional to their distance. The explanation is simple, but revolutionary: the Universe is expanding. Hubble was born in Missouri in 1889. His family moved to Chicago in 1898, where at High School he was a promising, though not exceptional, pupil. He ...
... galaxies are moving away from us with a speed proportional to their distance. The explanation is simple, but revolutionary: the Universe is expanding. Hubble was born in Missouri in 1889. His family moved to Chicago in 1898, where at High School he was a promising, though not exceptional, pupil. He ...
Lesson 4, Stars
... red giant, and finally, a white dwarf. A more-massive star: begins as a nebula, becomes a protostar, a main-sequence star, a very massive star, a supergiant, a supernova, and finally, either a neutron star (pulsar) or a black hole. ...
... red giant, and finally, a white dwarf. A more-massive star: begins as a nebula, becomes a protostar, a main-sequence star, a very massive star, a supergiant, a supernova, and finally, either a neutron star (pulsar) or a black hole. ...
What stars do Summary: Nuclear burning in stars •
... Can have high pressure without nuclear burning. ...
... Can have high pressure without nuclear burning. ...
Distance Measurement
... Astronomical objects are far away we need a large baseline The largest baseline we have is the orbit of the Earth around the Sun. ...
... Astronomical objects are far away we need a large baseline The largest baseline we have is the orbit of the Earth around the Sun. ...
Grand Tour Worksheet - School District of La Crosse
... 10. How fast are the gases receding from the Ring Nebula? ...
... 10. How fast are the gases receding from the Ring Nebula? ...
Exercise 7
... star chart printed on a page, we often forget about the three-dimensional nature of the universe. In this exercise, you will construct (with welding rods and Styrofoam balls) a model of nearby space including many of the nearest stars. Of course, you will need information on where to place the stars ...
... star chart printed on a page, we often forget about the three-dimensional nature of the universe. In this exercise, you will construct (with welding rods and Styrofoam balls) a model of nearby space including many of the nearest stars. Of course, you will need information on where to place the stars ...
Astronomy 104: Homework Set 6 Due: Wednesday, April 1, 2015
... a) What is the distance to a galaxy with a recession velocity of 10,000 km/s for an assumed Hubble constant of 90 km/s/Mpc? b) You measure the distance to a galaxy to be 120 Mpc and its recession velocity is 6,600 km/s. What Hubble constant would you derive from this galaxy? c) What is the distance ...
... a) What is the distance to a galaxy with a recession velocity of 10,000 km/s for an assumed Hubble constant of 90 km/s/Mpc? b) You measure the distance to a galaxy to be 120 Mpc and its recession velocity is 6,600 km/s. What Hubble constant would you derive from this galaxy? c) What is the distance ...
to view poster PDF - Max-Planck
... The Location of N36 in the Milky Way N36 is selected from the sample of Gong et al. (2012). Using the Galacitic rotation curve of Reid et al. (2009) and the Gaussian fit velocity of the average 13CO (1-0) emission (Vlsr=107.2 km s-1), we calculated for N36 a near distance of 5.7 kpc and a far distan ...
... The Location of N36 in the Milky Way N36 is selected from the sample of Gong et al. (2012). Using the Galacitic rotation curve of Reid et al. (2009) and the Gaussian fit velocity of the average 13CO (1-0) emission (Vlsr=107.2 km s-1), we calculated for N36 a near distance of 5.7 kpc and a far distan ...
Review for Exam 2
... 1) What causes a cloud of gas and dust to collapse to form a star? What halts the star’s collapse? 2) What is the source of the Sun’s energy? 3) What are the products of hydrogen fusion? 4) ...
... 1) What causes a cloud of gas and dust to collapse to form a star? What halts the star’s collapse? 2) What is the source of the Sun’s energy? 3) What are the products of hydrogen fusion? 4) ...
Neutron Star - Perry Local Schools
... of 1.4 to 3 solar masses, the remnant can become a neutron star. – If the leftover core has a mass that is greater than three solar masses, it will collapse to form a black ...
... of 1.4 to 3 solar masses, the remnant can become a neutron star. – If the leftover core has a mass that is greater than three solar masses, it will collapse to form a black ...
Red giants aren`t just big, they`re turbulent
... Since astronomers can neither zoom in on more distant stars nor peek under the cover of even the nearest one, how do they learn what drives these stellar furnaces? If they are Paul Woodward and David Porter, they create their own. These astrophysicists, nearly as well known for setting computing rec ...
... Since astronomers can neither zoom in on more distant stars nor peek under the cover of even the nearest one, how do they learn what drives these stellar furnaces? If they are Paul Woodward and David Porter, they create their own. These astrophysicists, nearly as well known for setting computing rec ...
January 2006
... roman numbers ( III means a giant star, V means dwarf star, etc). First letter is the spectral type: K (one of OBAFGKM), the arab number (5) is like a second digit to the spectral type, so K0 is very close to G, K9 is very close to M. ...
... roman numbers ( III means a giant star, V means dwarf star, etc). First letter is the spectral type: K (one of OBAFGKM), the arab number (5) is like a second digit to the spectral type, so K0 is very close to G, K9 is very close to M. ...
Test#4
... a) size and brightness, b) number of stars and size, c) shape and age, d) redshift velocity and distance 4. The distribution of matter in a galaxy can be found by measuring a) the number of stars, b) the rotation curve, c) number of pulsars, d) how thick a galaxy is 5. What type of galaxy is the And ...
... a) size and brightness, b) number of stars and size, c) shape and age, d) redshift velocity and distance 4. The distribution of matter in a galaxy can be found by measuring a) the number of stars, b) the rotation curve, c) number of pulsars, d) how thick a galaxy is 5. What type of galaxy is the And ...
Space Science Unit - World of Teaching
... phase of the star’s life cycle the star is in and other important information about the star. • Most stars are what we consider main sequence (including our sun). They make up 90% of the stars in our sky. These stars are the diagonal strip running through the middle of the chart. ...
... phase of the star’s life cycle the star is in and other important information about the star. • Most stars are what we consider main sequence (including our sun). They make up 90% of the stars in our sky. These stars are the diagonal strip running through the middle of the chart. ...
upperMS - CWRU Astronomy
... (OMC1). A small group of a few OB stars forms, they evolve and ionize gas. The HII region pushes a shock wave into the molecular cloud and compresses gas to start gravitational collapse for a new group of OB stars. They spread out in evolutionary sequence. ...
... (OMC1). A small group of a few OB stars forms, they evolve and ionize gas. The HII region pushes a shock wave into the molecular cloud and compresses gas to start gravitational collapse for a new group of OB stars. They spread out in evolutionary sequence. ...
1” “Sky-Notes” of the Open University Astronomy Club. April 2005
... star famous for its striking red colour being fittingly called “Herschel’s Garnet Star”. It is the reddest naked eye star visible from the northern hemisphere. Its colour may show signs of variability. To become a regular variable star observer it is advisable to have your own detailed star charts o ...
... star famous for its striking red colour being fittingly called “Herschel’s Garnet Star”. It is the reddest naked eye star visible from the northern hemisphere. Its colour may show signs of variability. To become a regular variable star observer it is advisable to have your own detailed star charts o ...
Powerpoint
... stars produce huge amounts of these. Such short-lived stars spend all their lives in the stellar nursery of their birth, so emission nebulae mark sites of ongoing star formation. Many stars of lower mass are forming too, but make few UV photons. Why "H II Region? H I: Hydrogen atom H II: Ionized Hyd ...
... stars produce huge amounts of these. Such short-lived stars spend all their lives in the stellar nursery of their birth, so emission nebulae mark sites of ongoing star formation. Many stars of lower mass are forming too, but make few UV photons. Why "H II Region? H I: Hydrogen atom H II: Ionized Hyd ...
Set 1
... such that equal numbers of stars are seen in a homogeneous isotropic region within equal logarithmic ranges of luminosity. What type of star dominates the counts if the slope x is flatter than this value? 6. The star formation history of a stellar population is often represented by an exponential de ...
... such that equal numbers of stars are seen in a homogeneous isotropic region within equal logarithmic ranges of luminosity. What type of star dominates the counts if the slope x is flatter than this value? 6. The star formation history of a stellar population is often represented by an exponential de ...
LESSON 4, STARS
... red giant, and finally, a white dwarf. A more-massive star: begins as a nebula, becomes a protostar, a main-sequence star, a very massive star, a supergiant, a supernova, and finally, either a neutron star (pulsar) or a black hole. ...
... red giant, and finally, a white dwarf. A more-massive star: begins as a nebula, becomes a protostar, a main-sequence star, a very massive star, a supergiant, a supernova, and finally, either a neutron star (pulsar) or a black hole. ...
Chapter 25 PowerPoint
... The Big Bang Theory • All energy & matter was created in an instant with an initial explosion. • The matter rapidly expanded throughout space in a swirling, dense mass. • Matter began to collect into clumps. As matter cooled, hydrogen & helium gases formed. • Eventually the first stars will form fo ...
... The Big Bang Theory • All energy & matter was created in an instant with an initial explosion. • The matter rapidly expanded throughout space in a swirling, dense mass. • Matter began to collect into clumps. As matter cooled, hydrogen & helium gases formed. • Eventually the first stars will form fo ...
Instructor Notes
... Core keeps shrinking – producing heat from contraction (way above amount need to fuse hydrogen, but there is no hydrogen in core). This heat is added to that of “shell burning”, so outer layers of star have more thermal pressure than needed to balance gravity Outer layers of star expand while core c ...
... Core keeps shrinking – producing heat from contraction (way above amount need to fuse hydrogen, but there is no hydrogen in core). This heat is added to that of “shell burning”, so outer layers of star have more thermal pressure than needed to balance gravity Outer layers of star expand while core c ...
Astronomy 112: Physics of Stars Problem set 2: Due April 29 1. Time
... 7. Polytropes: A neutron star is roughly describable as a polytrope of index 1. The radius of a typical neutron star of mass 1.4 solar masses is 10 km. What is its central density? The density of the atomic nucleus is 2.4 x 10**14 g cm−3 . Compare the value you computed to this number. Neutron stars ...
... 7. Polytropes: A neutron star is roughly describable as a polytrope of index 1. The radius of a typical neutron star of mass 1.4 solar masses is 10 km. What is its central density? The density of the atomic nucleus is 2.4 x 10**14 g cm−3 . Compare the value you computed to this number. Neutron stars ...
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.