the life cycles of stars (5) - U3A Bendigo Courses / Activities
... HEAVY WEIGHT STARS with zero age mass more than 8 M O The main sequence life burning hydrogen lasts only 100 million years instead of 10 billion for the sun. These are O and B type stars. Even before leaving the main sequence these stars emit material from their surface due to sheer radiation pressu ...
... HEAVY WEIGHT STARS with zero age mass more than 8 M O The main sequence life burning hydrogen lasts only 100 million years instead of 10 billion for the sun. These are O and B type stars. Even before leaving the main sequence these stars emit material from their surface due to sheer radiation pressu ...
Galaxy / Cluster Ecosystem Ming Sun (University of Alabama in Huntsville)
... embedded in the 6.7 keV ICM. A sharp edge 0.8 kpc south of the nucleus. Galaxy’svelocity vs.Perseus’s: + 2170 km/s --Mach number of ~ 3 --- a Bullet galaxy ! Soft X-ray Radio Optical Sun, Jerius & Jones 2005 ...
... embedded in the 6.7 keV ICM. A sharp edge 0.8 kpc south of the nucleus. Galaxy’svelocity vs.Perseus’s: + 2170 km/s --Mach number of ~ 3 --- a Bullet galaxy ! Soft X-ray Radio Optical Sun, Jerius & Jones 2005 ...
Origin of stars
... accepted’ theory of stellar formation may be one of a hundred unsupported dogmas which constitute a large part of present-day ...
... accepted’ theory of stellar formation may be one of a hundred unsupported dogmas which constitute a large part of present-day ...
Lec9_2D
... The Death of a Low Mass Star • After mass loss, stars that had initial masses less than about 8 M have final masses less than 1.4 M. The electrostatic repulsion of carbon (6 protons) and oxygen (8 protons) is so great that these objects cannot fuse carbon and oxygen. • When on the 2nd Giant Branc ...
... The Death of a Low Mass Star • After mass loss, stars that had initial masses less than about 8 M have final masses less than 1.4 M. The electrostatic repulsion of carbon (6 protons) and oxygen (8 protons) is so great that these objects cannot fuse carbon and oxygen. • When on the 2nd Giant Branc ...
May 2013 - Otterbein
... Understanding the Stars? • What does understanding mean? – We can predict their brightness from other properties? – We can calculate their masses from other properties? – We understand how energy is being produced? – We understand how stars from, live and die? – Something else/ All of the above? ...
... Understanding the Stars? • What does understanding mean? – We can predict their brightness from other properties? – We can calculate their masses from other properties? – We understand how energy is being produced? – We understand how stars from, live and die? – Something else/ All of the above? ...
V - ESO
... This is generally assumed to be the reason why, though star formation proceeds on a typical scale comparable to the size of a giant molecular cloud (~80 pc, Efremov 1995, AJ 100, 2757), Milky Way massive clusters tend to be much smaller. Image taken from class by James Schombert, University of Oreg ...
... This is generally assumed to be the reason why, though star formation proceeds on a typical scale comparable to the size of a giant molecular cloud (~80 pc, Efremov 1995, AJ 100, 2757), Milky Way massive clusters tend to be much smaller. Image taken from class by James Schombert, University of Oreg ...
Observers` Forum - British Astronomical Association
... closely over the next few months to deter- spin period, but so far none of the signals mine how long the fade lasts and how faint appears to be persistent. it becomes. One observation per night is sufficient to cover the general profile of the Jeremy Shears & Gary Poyner event; a comparison star seq ...
... closely over the next few months to deter- spin period, but so far none of the signals mine how long the fade lasts and how faint appears to be persistent. it becomes. One observation per night is sufficient to cover the general profile of the Jeremy Shears & Gary Poyner event; a comparison star seq ...
15-3 Notes: Galaxies
... of sizes and shapes. The largest galaxies contain more than a trillion stars. Astronomers classify a galaxy as a spiral, elliptical, or irregular galaxy according to its shape. Spiral galaxies, such as the Andromeda galaxy, have a bulge at the center and spiral arms. The spiral arms are made up of g ...
... of sizes and shapes. The largest galaxies contain more than a trillion stars. Astronomers classify a galaxy as a spiral, elliptical, or irregular galaxy according to its shape. Spiral galaxies, such as the Andromeda galaxy, have a bulge at the center and spiral arms. The spiral arms are made up of g ...
Chapter 27 Quasars, Active Galaxies, and Gamma
... • Early radio telescopes found radio emission from stars, nebulae, and some galaxies. • There were also point-like, or star-like, radio sources which varied rapidly these are the `quasi-stellar’ radio sources or quasars. • In visible light quasars appear as points, like stars. ...
... • Early radio telescopes found radio emission from stars, nebulae, and some galaxies. • There were also point-like, or star-like, radio sources which varied rapidly these are the `quasi-stellar’ radio sources or quasars. • In visible light quasars appear as points, like stars. ...
Chapter 8: The Pennsylvanian Period in Alabama: Looking Up
... change. These changes are imperceptible over hundreds or thousands of years, but over 310 million years, the changes would be large enough to completely change the apparent position of every star. Fig. 8.6 shows the changes in the Big Dipper that have occurred and will occur. While the ancient Egyp ...
... change. These changes are imperceptible over hundreds or thousands of years, but over 310 million years, the changes would be large enough to completely change the apparent position of every star. Fig. 8.6 shows the changes in the Big Dipper that have occurred and will occur. While the ancient Egyp ...
doc - Eu-Hou
... At the same time, the two teams realized that only a Universe in accelerated expansion can explain this effect, and published their results in scientific papers. Their discovery implied that the Universe was filled by an energy that “pulls” the galaxies apart, called the Dark Energy. It opened so ma ...
... At the same time, the two teams realized that only a Universe in accelerated expansion can explain this effect, and published their results in scientific papers. Their discovery implied that the Universe was filled by an energy that “pulls” the galaxies apart, called the Dark Energy. It opened so ma ...
Astronomy (C) - North Carolina Science Olympiad
... Can’t be directly observed – must be inferred from presence of accretion disk and/or jet ...
... Can’t be directly observed – must be inferred from presence of accretion disk and/or jet ...
Slide 1
... discovered by Jocelyn Bell and Anthony Hewish • As the core of a star collapses to form a neutron star, it spins fasters and faster • Its magnetic field becomes concentrated, and this results in a beam of radio waves coming out of its ...
... discovered by Jocelyn Bell and Anthony Hewish • As the core of a star collapses to form a neutron star, it spins fasters and faster • Its magnetic field becomes concentrated, and this results in a beam of radio waves coming out of its ...
The Pennsylvanian Period in Alabama: Looking Up Astronomy and
... main sequence lifetimes. Since the system existed 310 million years ago, it is interesting to ask where it was at that time. Although Rigel Kent's orbit is close to ours, its distance from us and its direction in the sky vary considerably over time. 310 million years ago, it was 2,900 light years a ...
... main sequence lifetimes. Since the system existed 310 million years ago, it is interesting to ask where it was at that time. Although Rigel Kent's orbit is close to ours, its distance from us and its direction in the sky vary considerably over time. 310 million years ago, it was 2,900 light years a ...
The Properties of Stars
... The blue star (A) is moving away from us, so its spectrum is red-shifted while that of the red star (B) is blue-shifted. When the stars arrive at the points P, Q, R, and S they are moving across our line of sight so we see no redshift. ...
... The blue star (A) is moving away from us, so its spectrum is red-shifted while that of the red star (B) is blue-shifted. When the stars arrive at the points P, Q, R, and S they are moving across our line of sight so we see no redshift. ...
Our Galaxy
... of visible part of disk of our galaxy d) this is not known yet. 3. Most young stars are found in: ) The center, b) in Halo, outskirts of our galaxy, c) disk of our galaxy d) this is not known yet because MWG is too dusty for us to determine this info. 1. a, 2. c, 3. c ...
... of visible part of disk of our galaxy d) this is not known yet. 3. Most young stars are found in: ) The center, b) in Halo, outskirts of our galaxy, c) disk of our galaxy d) this is not known yet because MWG is too dusty for us to determine this info. 1. a, 2. c, 3. c ...
Evolution of a Protostar
... A life track illustrates a star's surface temperature and luminosity at different moments in time. ...
... A life track illustrates a star's surface temperature and luminosity at different moments in time. ...
The 22 First Magnitude Stars
... • Only the brightest stars have proper names in common use • Multiple stars have suffix A, B, C, etc. applied to components in order of apparent brightness ...
... • Only the brightest stars have proper names in common use • Multiple stars have suffix A, B, C, etc. applied to components in order of apparent brightness ...
Making Visual Estimates
... Variable and comparison stars Look at the example below. The variable is shown between the four focus lines. The magnitudes of the comparison (“comp”) stars are shown on the chart next to the stars (64,51,91, etc.). ...
... Variable and comparison stars Look at the example below. The variable is shown between the four focus lines. The magnitudes of the comparison (“comp”) stars are shown on the chart next to the stars (64,51,91, etc.). ...
Astr604-Ch1
... to obtain the magnitudes. Detectors of electromagnetic radiation are sensitive only over given wavelength bands. Because the flux of star light varies with wavelength, the magnitude of a star depends on the wavelength interval at which we observe. Originally, photographic plates were sensitive only ...
... to obtain the magnitudes. Detectors of electromagnetic radiation are sensitive only over given wavelength bands. Because the flux of star light varies with wavelength, the magnitude of a star depends on the wavelength interval at which we observe. Originally, photographic plates were sensitive only ...
Stages in the Life of a Star
... Assume that all stars in cluster form at about the same time. Stars slightly heavier than turnoff have already evolved away from main sequence. ...
... Assume that all stars in cluster form at about the same time. Stars slightly heavier than turnoff have already evolved away from main sequence. ...
Star formation, feedback and the role of SNe II and SNe Ia in the
... dwarf found that Fornax has a more massive dark matter halo than found by previous studies (M/LV=10-40 in the sampled region) and proposed models with M=108-109 MO ...
... dwarf found that Fornax has a more massive dark matter halo than found by previous studies (M/LV=10-40 in the sampled region) and proposed models with M=108-109 MO ...
The Bible and big bang cosmology
... accepted’ theory of stellar formation may be one of a hundred unsupported dogmas which constitute a large part of present-day ...
... accepted’ theory of stellar formation may be one of a hundred unsupported dogmas which constitute a large part of present-day ...
Serpens
Serpens (""the Serpent"", Greek Ὄφις) is a constellation of the northern hemisphere. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations defined by the International Astronomical Union. It is unique among the modern constellations in being split into two non-contiguous parts, Serpens Caput (Serpent's Head) to the west and Serpens Cauda (Serpent's Tail) to the east. Between these two halves lies the constellation of Ophiuchus, the ""Serpent-Bearer"". In figurative representations, the body of the serpent is represented as passing behind Ophiuchus between Mu Serpentis in Serpens Caput and Nu Serpentis in Serpens Cauda.The brightest star in Serpens is the red giant star Alpha Serpentis, or Unukalhai, in Serpens Caput, with an apparent magnitude of 2.63. Also located in Serpens Caput are the naked-eye globular cluster Messier 5 and the naked-eye variables R Serpentis and Tau4 Serpentis. Notable extragalactic objects include Seyfert's Sextet, one of the densest galaxy clusters known; Arp 220, the prototypical ultraluminous infrared galaxy; and Hoag's Object, the most famous of the very rare class of galaxies known as ring galaxies.Part of the Milky Way's galactic plane passes through Serpens Cauda, which is therefore rich in galactic deep-sky objects, such as the Eagle Nebula (IC 4703) and its associated star cluster Messier 16. The nebula measures 70 light-years by 50 light-years and contains the Pillars of Creation, three dust clouds that became famous for the image taken by the Hubble Space Telescope. Other striking objects include the Red Square Nebula, one of the few objects in astronomy to take on a square shape; and Westerhout 40, a massive nearby star-forming region consisting of a molecular cloud and an H II region.