A Teacher`s Guide to the Universe
... In order to gain a better understanding of the scale of the universe, it is helpful to begin by calculating the size and scale of something that is easily measurable. As a useful introductory exercise, map the classroom in two dimensions at different scales so that the skills of linear measurement, ...
... In order to gain a better understanding of the scale of the universe, it is helpful to begin by calculating the size and scale of something that is easily measurable. As a useful introductory exercise, map the classroom in two dimensions at different scales so that the skills of linear measurement, ...
Constellation Paper - Matt Hape`s Portfolio
... particularly interesting to me because I happen to believe in astrology to some extent and, being born on March fifteenth, my zodiac sign is Pisces. Astrology is one of those controversial things that some people think is complete bogus and others actually believe that there can be some sort of corr ...
... particularly interesting to me because I happen to believe in astrology to some extent and, being born on March fifteenth, my zodiac sign is Pisces. Astrology is one of those controversial things that some people think is complete bogus and others actually believe that there can be some sort of corr ...
148 Jun - British Astronomical Association
... The brightening phase of the eclipse was scheduled to start on 19th March. In fact it started at the beginning of March. At that time it seemed that the eclipse would be completed earlier than the predicted date of 13th May 2011. The brightening trend was, however, interrupted in late April. The lig ...
... The brightening phase of the eclipse was scheduled to start on 19th March. In fact it started at the beginning of March. At that time it seemed that the eclipse would be completed earlier than the predicted date of 13th May 2011. The brightening trend was, however, interrupted in late April. The lig ...
Stars, Galaxies, Superuniverses and the Urantia Book, by Frederick
... of stars per galaxy is 4.4 x 1021 stars divided by 1.0 x 1011 galaxies or 4.4 x 1010 stars per galaxy (44 billion). The number of stars in our Milky Way galaxy is estimated to be around 200 to 400 billion. This is pretty good agreement with our average number since our galaxy is the second largest i ...
... of stars per galaxy is 4.4 x 1021 stars divided by 1.0 x 1011 galaxies or 4.4 x 1010 stars per galaxy (44 billion). The number of stars in our Milky Way galaxy is estimated to be around 200 to 400 billion. This is pretty good agreement with our average number since our galaxy is the second largest i ...
Annual Report 2006/2007
... The cover image shows a composite image of the supernova remnant Cassiopeia A (Cas A). This object is the brightest radio source in the sky, and has been created by a supernova explosion about 330 year ago. The star itself had a mass of around 20 times the mass of the sun, but by the time it explode ...
... The cover image shows a composite image of the supernova remnant Cassiopeia A (Cas A). This object is the brightest radio source in the sky, and has been created by a supernova explosion about 330 year ago. The star itself had a mass of around 20 times the mass of the sun, but by the time it explode ...
Galaxies - WordPress.com
... A there are about the same number of stars per volume between the spiral arms as in them. B the number of stars per volume is much greater between the spiral arms than in them. C the number of stars per volume is much less between the spiral arms than in them. D the theory predicts nothing about the ...
... A there are about the same number of stars per volume between the spiral arms as in them. B the number of stars per volume is much greater between the spiral arms than in them. C the number of stars per volume is much less between the spiral arms than in them. D the theory predicts nothing about the ...
Chapter 10 Formation and evolution of the Local Group
... used (Θ0 = 220 km s−1 ), although it is even somewhat larger than a suggested revised velocity (239 km s−1 ) as discussed below in Section 10.2.3. As discussed more fully in Section 10.2.2 Tolstoy, Hill and Tosi (2009) state how all dwarf galaxies in the LG possess old (>10 Gyr) stars. van den Bergh ...
... used (Θ0 = 220 km s−1 ), although it is even somewhat larger than a suggested revised velocity (239 km s−1 ) as discussed below in Section 10.2.3. As discussed more fully in Section 10.2.2 Tolstoy, Hill and Tosi (2009) state how all dwarf galaxies in the LG possess old (>10 Gyr) stars. van den Bergh ...
Introduction_to_pulsar_astronomy
... neutron stars. He predicts a very slow and steady spin-down for these objects, based on the fact that they must be losing rotational energy due to their large EM emission. If the pulsations were due to vibration, then the intensity of the oscillation should decrease, and the vibration period (a char ...
... neutron stars. He predicts a very slow and steady spin-down for these objects, based on the fact that they must be losing rotational energy due to their large EM emission. If the pulsations were due to vibration, then the intensity of the oscillation should decrease, and the vibration period (a char ...
sections 23-25 powerpoint
... gas or dust. Spiral Galaxy (S). A galaxy with a spheroidal bulge of several million old low-mass stars and a flattened pancake-like disk of billions of old low-mass and young high-mass stars, along with gas or dust, dominated by two (or more) spiral arms. Irregular galaxy (Ir). A galaxy containing m ...
... gas or dust. Spiral Galaxy (S). A galaxy with a spheroidal bulge of several million old low-mass stars and a flattened pancake-like disk of billions of old low-mass and young high-mass stars, along with gas or dust, dominated by two (or more) spiral arms. Irregular galaxy (Ir). A galaxy containing m ...
instructor notes: weeks 9/10
... bluer in colour than isolated galaxies, presumably because of the presence of recently-created hot young stars. It is believed that a tidal interaction with another galaxy has induced star formation, although the resulting excess luminosity is hidden behind obscuring clouds of gas and dust. Such gal ...
... bluer in colour than isolated galaxies, presumably because of the presence of recently-created hot young stars. It is believed that a tidal interaction with another galaxy has induced star formation, although the resulting excess luminosity is hidden behind obscuring clouds of gas and dust. Such gal ...
2012 December Vol. 49 No 584
... If you have several cloudy nights it can be very frustrating to the active observer. Could I recommend you buy a book relating to the history of astronomy and familiarise yourself on the rich history we have inherited. It will also reveal that whilst we look at their amazing astronomical observation ...
... If you have several cloudy nights it can be very frustrating to the active observer. Could I recommend you buy a book relating to the history of astronomy and familiarise yourself on the rich history we have inherited. It will also reveal that whilst we look at their amazing astronomical observation ...
A Zoo of Galaxies - Cambridge University Press
... in order to reveal its size and mass. Hubble is most famous for a discovery which revolutionised extragalactic astronomy in its ability to provide a relatively quick and easy way to make these distance estimates. In 1929, Edwin Hubble used a sample of just 24 nearby galaxies to make this discovery. ...
... in order to reveal its size and mass. Hubble is most famous for a discovery which revolutionised extragalactic astronomy in its ability to provide a relatively quick and easy way to make these distance estimates. In 1929, Edwin Hubble used a sample of just 24 nearby galaxies to make this discovery. ...
Lecture notes 18: Galaxies and galaxy clusters
... Immanuel Kant (1724–1824) and Thomas Wright (1711–1786) were among the first to recocnize the possibility that the Milky Way was indeed a stellar disk where the Sun was but one of many. Kant went on to propose that if the Milky Way were limited then perhaps the diffuse “elliptical nebulae” seen in the ...
... Immanuel Kant (1724–1824) and Thomas Wright (1711–1786) were among the first to recocnize the possibility that the Milky Way was indeed a stellar disk where the Sun was but one of many. Kant went on to propose that if the Milky Way were limited then perhaps the diffuse “elliptical nebulae” seen in the ...
A Comet-Hunter`s Legacy -
... larger and brighter M81 of course a bit more noticeably. The two galaxies are orbiting each other about once every hundred million years, probably as a result of a near-collision about six hundred million years in the past; and each time they pass by each other, they undergo episodes of star format ...
... larger and brighter M81 of course a bit more noticeably. The two galaxies are orbiting each other about once every hundred million years, probably as a result of a near-collision about six hundred million years in the past; and each time they pass by each other, they undergo episodes of star format ...
83-98
... fine analysis. However, for X Cyg the estimate of HP is higher than the one derived by LL by 0.18 dex which is surprising. The differences in phases can partly account for the discrepancy. The observations of HP were made at a phase at which the assumption of hydrostatic equilibrium holds better tha ...
... fine analysis. However, for X Cyg the estimate of HP is higher than the one derived by LL by 0.18 dex which is surprising. The differences in phases can partly account for the discrepancy. The observations of HP were made at a phase at which the assumption of hydrostatic equilibrium holds better tha ...
A Zoo of Galaxies
... fraction of the numbers of normal spirals” (at least in the photographic plates he used). In between the spirals and ellipticals was the (then hypothetical) S0, or lenticular type, which shows a disc, but no spiral arms. The small number of galaxies Hubble found not fitting this scheme were called “ ...
... fraction of the numbers of normal spirals” (at least in the photographic plates he used). In between the spirals and ellipticals was the (then hypothetical) S0, or lenticular type, which shows a disc, but no spiral arms. The small number of galaxies Hubble found not fitting this scheme were called “ ...
A Zoo of Galaxies - Portsmouth Research Portal
... fraction of the numbers of normal spirals” (at least in the photographic plates he used). In between the spirals and ellipticals was the (then hypothetical) S0, or lenticular type, which shows a disc, but no spiral arms. The small number of galaxies Hubble found not fitting this scheme were called “ ...
... fraction of the numbers of normal spirals” (at least in the photographic plates he used). In between the spirals and ellipticals was the (then hypothetical) S0, or lenticular type, which shows a disc, but no spiral arms. The small number of galaxies Hubble found not fitting this scheme were called “ ...
3. Cosmology and the Origin and Evolution of Galaxies
... (SEDs) of mm galaxies at rest-frame mid-IR to radio wavelengths can provide photometric-redshifts with sufficient accuracy7. There has also been some success in the measurement of optical and IR spectroscopic redshifts for a fraction of the bright mm galaxies (S850µm > 5 mJy) with reliable radio coun ...
... (SEDs) of mm galaxies at rest-frame mid-IR to radio wavelengths can provide photometric-redshifts with sufficient accuracy7. There has also been some success in the measurement of optical and IR spectroscopic redshifts for a fraction of the bright mm galaxies (S850µm > 5 mJy) with reliable radio coun ...
Constellation Guide Book
... People like to look at the stars at night. They want to see the constellations. Many people use constellation guides to help them find the constellations. These guides also include information about each constellation. Your assignment is to make a guide to fall constellations. You have an informatio ...
... People like to look at the stars at night. They want to see the constellations. Many people use constellation guides to help them find the constellations. These guides also include information about each constellation. Your assignment is to make a guide to fall constellations. You have an informatio ...
Article PDF - IOPscience
... wide range of colors (and include RR Lyrae variables), Fornax 4 is seen to have a red horizontal branch. Fornax 4 is D3 Gyr younger than the other Fornax globulars. Buonanno et al. draw attention to the fact that the colormagnitude diagram of Fornax 4 exhibits a strong resemblance to that of the ““ ...
... wide range of colors (and include RR Lyrae variables), Fornax 4 is seen to have a red horizontal branch. Fornax 4 is D3 Gyr younger than the other Fornax globulars. Buonanno et al. draw attention to the fact that the colormagnitude diagram of Fornax 4 exhibits a strong resemblance to that of the ““ ...
21_Testbank
... Answer: Starburst galaxies are filled with star-forming molecular clouds, which contain dust grains that absorb most of the visible light produced by the young stars. This radiation heats the dust grains to very high temperatures, and they re-emit all the absorbed energy as infrared light. 3) Explai ...
... Answer: Starburst galaxies are filled with star-forming molecular clouds, which contain dust grains that absorb most of the visible light produced by the young stars. This radiation heats the dust grains to very high temperatures, and they re-emit all the absorbed energy as infrared light. 3) Explai ...
Tuomas Kangas
... In this doctoral thesis, core-collapse supernova progenitor stars are studied. Different ways to gain information on the progenitor stars of core-collapse supernovae are explored, with an emphasis on using the environments of supernovae. In the articles included in the thesis, various such methods a ...
... In this doctoral thesis, core-collapse supernova progenitor stars are studied. Different ways to gain information on the progenitor stars of core-collapse supernovae are explored, with an emphasis on using the environments of supernovae. In the articles included in the thesis, various such methods a ...
PPT presentation
... able to obtain echelle spectra of them with 11.5 km/s resolution, using 1.0m and 2.3m telescopes. The nebulae were spatially unresolved from the ground but asymmetric velocity profiles indicate non-spherically symmetric nebulae. Vexp (OII) was found to exceed Vexp (OIII) on average. The radial veloc ...
... able to obtain echelle spectra of them with 11.5 km/s resolution, using 1.0m and 2.3m telescopes. The nebulae were spatially unresolved from the ground but asymmetric velocity profiles indicate non-spherically symmetric nebulae. Vexp (OII) was found to exceed Vexp (OIII) on average. The radial veloc ...
The Milky Way - The Independent School
... a galaxy: Infer mass in the very center central black holes! Several million, up to more than a billion solar masses! Supermassive ...
... a galaxy: Infer mass in the very center central black holes! Several million, up to more than a billion solar masses! Supermassive ...
History of supernova observation
The known history of supernova observation goes back to 185 CE, when, supernova SN 185 appeared, the oldest appearance of a supernova recorded by humankind. Several additional supernovae within the Milky Way galaxy have been recorded since that time, with SN 1604 being the most recent supernova to be observed in this galaxy.Since the development of the telescope, the field of supernova discovery has expanded to other galaxies. These occurrences provide important information on the distances of galaxies. Successful models of supernova behavior have also been developed, and the role of supernovae in the star formation process is now increasingly understood.