The Classification of Galaxies By Daniel Underwood Contents The
... accepted by astronomers that there were other galaxies than our own in the cosmos. However, it wasn’t immediately recognised that these nebulae were actually galaxies like our own, it took time to realise that they weren’t gaseous, but actually massive collections of stars. These masses outside the ...
... accepted by astronomers that there were other galaxies than our own in the cosmos. However, it wasn’t immediately recognised that these nebulae were actually galaxies like our own, it took time to realise that they weren’t gaseous, but actually massive collections of stars. These masses outside the ...
30-1 - Fremont Peak Observatory Association
... At this time (May 2013) Polaris is about 40’ (40 arcminutes) from the North Celestial Pole (NCP). In the course of 24 hours Polaris makes a 1° (1 degree) circle around the NCP. It is somewhat difficult to believe, but at the present time, Polaris is more than one Moon width from the NCP. In addition ...
... At this time (May 2013) Polaris is about 40’ (40 arcminutes) from the North Celestial Pole (NCP). In the course of 24 hours Polaris makes a 1° (1 degree) circle around the NCP. It is somewhat difficult to believe, but at the present time, Polaris is more than one Moon width from the NCP. In addition ...
Stars and Planets - The University of Texas at Dallas
... with the Earth at the center of the Universe. This cosmology of the nature of the Universe was adopted by the Catholic church. Image From http://www-gap.dcs.stand.ac.uk/~history/Mathematicians/Ptolemy.html Copernican Revolution: Led by Copernicus, Galileo, and Kepler, the Copernican Revolution gave ...
... with the Earth at the center of the Universe. This cosmology of the nature of the Universe was adopted by the Catholic church. Image From http://www-gap.dcs.stand.ac.uk/~history/Mathematicians/Ptolemy.html Copernican Revolution: Led by Copernicus, Galileo, and Kepler, the Copernican Revolution gave ...
Refusing to Go Quietly: GRBs and Their Progenitors
... Advanced LIGO will be able to detect gravitational waves that stretch the length of the arms by a fraction of the size of a proton ...
... Advanced LIGO will be able to detect gravitational waves that stretch the length of the arms by a fraction of the size of a proton ...
19. Our Galaxy 19.1 The Milky Way Revealed Our goals for learning
... • What is the significance of a rotation curve that is flat at large distances from the galactic center? • The Milky Way’s flat rotation curve implies that the matter associated with our galaxy extends to large distances from the center. A rotation curve is a plot of the orbital speed of stars or ga ...
... • What is the significance of a rotation curve that is flat at large distances from the galactic center? • The Milky Way’s flat rotation curve implies that the matter associated with our galaxy extends to large distances from the center. A rotation curve is a plot of the orbital speed of stars or ga ...
... NGC 253 is the jewel of Sculptor. It is a magnitude 7, nearly edgeon spiral galaxy. It is nearly half a degree long and while it can be picked up in binocular, an aperture of at least 100mm is required to just make out the smudge of the spiral arms. A medium aperture telescope will start to resolve ...
Brown et al. 2008 Studying Resolved Stellar
... One of the core goals of the James Webb Space Telescope (JWST) is to determine the history of star formation and metal enrichment in the Universe. JWST will pursue this goal primarily by searching for luminous objects at very high redshift. An important complement to the high-redshift observations w ...
... One of the core goals of the James Webb Space Telescope (JWST) is to determine the history of star formation and metal enrichment in the Universe. JWST will pursue this goal primarily by searching for luminous objects at very high redshift. An important complement to the high-redshift observations w ...
Determining the Sizes & Distances of Stars Using the H
... mass loss causes the star to eject its outer layers, which continue expanding out into space to form a planetary nebulae. For example, a star like the Sun will loose approximately 60% of its mass as it evolves to become a white dwarf. White dwarfs are low in luminosity, because fusion can no longer ...
... mass loss causes the star to eject its outer layers, which continue expanding out into space to form a planetary nebulae. For example, a star like the Sun will loose approximately 60% of its mass as it evolves to become a white dwarf. White dwarfs are low in luminosity, because fusion can no longer ...
Deep Space Mystery Note Form 3
... Small core of neutrons Spinning neutron star. Neutrons produce radio waves in a steady stream or random bursts. Stars 10 times the sun will leave a black hole. Leave behind a large core. With no energy fuse, it doesn’t have any out ward pressure so it gets engulfed in it’s own gravity an ...
... Small core of neutrons Spinning neutron star. Neutrons produce radio waves in a steady stream or random bursts. Stars 10 times the sun will leave a black hole. Leave behind a large core. With no energy fuse, it doesn’t have any out ward pressure so it gets engulfed in it’s own gravity an ...
First Light for May, 2001 - South Bay Astronomical Society
... The transit method can only find systems that are aligned with our line of sight. The Stellar Wobble Method can find planetary systems that are not fully aligned with our line of sight but still have a component that provides a relative motion towards or away from Earth. Thus, the Wobble method pro ...
... The transit method can only find systems that are aligned with our line of sight. The Stellar Wobble Method can find planetary systems that are not fully aligned with our line of sight but still have a component that provides a relative motion towards or away from Earth. Thus, the Wobble method pro ...
Chapter 13 (Properties of Stars)
... 24. The largest known stars. 25. Most low mass, red stars in our neighborhood. 26. Sirius B, the hot white dwarf only 1/1000th as luminous as the sun. 27. The vast majority of bright blue naked eye stars. 28. Most naked eye stars that appear red or orange in color. 29. The most massive young stars. ...
... 24. The largest known stars. 25. Most low mass, red stars in our neighborhood. 26. Sirius B, the hot white dwarf only 1/1000th as luminous as the sun. 27. The vast majority of bright blue naked eye stars. 28. Most naked eye stars that appear red or orange in color. 29. The most massive young stars. ...
21. Galaxy Evolution Agenda The Monty Hall Problem/Paradox 21.1
... because of their large size and the fact that they sometimes contain multiple clumps of stars that probably were once the centers of individual galaxies. ...
... because of their large size and the fact that they sometimes contain multiple clumps of stars that probably were once the centers of individual galaxies. ...
Chapter 15 THE MILKY WAY IN RELATION TO OTHER GALAXIES
... the SMC experience current star formation and are rich in interstellar medium. They are companions of the Galaxy at distances of respectively about 50 and 65 kpc. Their integrated (absolute) magnitudes are MV = −18.4 and −17.1 (2.0 109 and 6.0 108 L⊙ ) and colors (B − V ) 0.52 and 0.61. So these are ...
... the SMC experience current star formation and are rich in interstellar medium. They are companions of the Galaxy at distances of respectively about 50 and 65 kpc. Their integrated (absolute) magnitudes are MV = −18.4 and −17.1 (2.0 109 and 6.0 108 L⊙ ) and colors (B − V ) 0.52 and 0.61. So these are ...
Feedback - Cambridge University Press
... halos with fb ≈ 1, combined with the relatively short gas cooling times in many massive clusters, suggests that something is preventing gas from turning into stars. One possible explanation is that the gas is heated by active galactic nuclei, which are seen in almost all clusters with cooling times ...
... halos with fb ≈ 1, combined with the relatively short gas cooling times in many massive clusters, suggests that something is preventing gas from turning into stars. One possible explanation is that the gas is heated by active galactic nuclei, which are seen in almost all clusters with cooling times ...
StarIntro_sb12
... The enormous pressure and heat in a star’s core convert matter into energy. Stars consist of controlled atomic reactions called nuclear fusion in which hydrogen (nuclei) atoms fuse to form ...
... The enormous pressure and heat in a star’s core convert matter into energy. Stars consist of controlled atomic reactions called nuclear fusion in which hydrogen (nuclei) atoms fuse to form ...
Drawing Constellations
... instead of a point of light by the Hubble Space Telescope on March 3, 1995. 12th brightest star in the sky . Possibly will be the very next supernova in our galaxy. ...
... instead of a point of light by the Hubble Space Telescope on March 3, 1995. 12th brightest star in the sky . Possibly will be the very next supernova in our galaxy. ...
Chapter 6 Stars
... from the life cycle of a low-mass or medium-mass star. High-mass stars quickly evolve into brilliant supergiants. When a supergiant runs out of fuel, it can explode suddenly. Within hours, the star blazes millions of times brighter. The explosion is called a supernova. After a supernova, some of th ...
... from the life cycle of a low-mass or medium-mass star. High-mass stars quickly evolve into brilliant supergiants. When a supergiant runs out of fuel, it can explode suddenly. Within hours, the star blazes millions of times brighter. The explosion is called a supernova. After a supernova, some of th ...
Stars 3
... axis 30 times a second, its twin searchlight beams sweep past the Earth, causing the neutron star to blink on and off. Because of this flickering, the neutron star is also called a “pulsar.” In addition to the pulses, the neutron star’s rapid rotation and intense magnetic field act as an immense sli ...
... axis 30 times a second, its twin searchlight beams sweep past the Earth, causing the neutron star to blink on and off. Because of this flickering, the neutron star is also called a “pulsar.” In addition to the pulses, the neutron star’s rapid rotation and intense magnetic field act as an immense sli ...
PH607lec12-5gal3
... Early type spirals formed most of their stars early on (used up their gas, have older/redder stars) Late type spirals have substantial on-going star-formation, didn’t form as many stars early-on (and thus lots of gas left) Spirals are forming stars at a few Msun per year, and we know that the ...
... Early type spirals formed most of their stars early on (used up their gas, have older/redder stars) Late type spirals have substantial on-going star-formation, didn’t form as many stars early-on (and thus lots of gas left) Spirals are forming stars at a few Msun per year, and we know that the ...
Lect16-3-28-and-30-1..
... That is, the concentrations of C, N, and O are left unchanged by the fusion reactions, but they permit hydrogen to fuse into helium through a chain of reactions, called the CNO cycle, that makes the helium production rate far higher than would be possible through the proton-proton chain alone. p of ...
... That is, the concentrations of C, N, and O are left unchanged by the fusion reactions, but they permit hydrogen to fuse into helium through a chain of reactions, called the CNO cycle, that makes the helium production rate far higher than would be possible through the proton-proton chain alone. p of ...
Project 2. CCD Photometry
... Rather than just have one apparent magnitude, measured across the entire visible spectrum we can use a filter to restrict the incoming light to a narrow waveband. If, for instance, we use a filter that only allows light in the blue part of the spectrum, we can measure a star's blue ...
... Rather than just have one apparent magnitude, measured across the entire visible spectrum we can use a filter to restrict the incoming light to a narrow waveband. If, for instance, we use a filter that only allows light in the blue part of the spectrum, we can measure a star's blue ...
An Eclectic View of our Milky Way Galaxy
... for mapping spiral arms. Proper motion data in conjunction with the newly-estimated velocity components for the Sun’s motion imply a distance to the Galactic centre of R0 = 8.34 ± 0.27 kpc , consistent with recent estimates which average 8.24 ± 0.09 kpc. A cosinusoidal Galactic potential is not rule ...
... for mapping spiral arms. Proper motion data in conjunction with the newly-estimated velocity components for the Sun’s motion imply a distance to the Galactic centre of R0 = 8.34 ± 0.27 kpc , consistent with recent estimates which average 8.24 ± 0.09 kpc. A cosinusoidal Galactic potential is not rule ...
1.3 Lifecycle of stars
... The Death of a Low-Mass Star As the white dwarf cools, its size does not change significantly; it simply gets dimmer and dimmer, and finally ceases to glow. ...
... The Death of a Low-Mass Star As the white dwarf cools, its size does not change significantly; it simply gets dimmer and dimmer, and finally ceases to glow. ...
harvest09b - NMSU Astronomy
... Galaxies form in the cosmic web They accrete gas, form stars, and deposit energy/metals into IGM Extended metal enriched “halos” are observed from z=0 to z=4 ...
... Galaxies form in the cosmic web They accrete gas, form stars, and deposit energy/metals into IGM Extended metal enriched “halos” are observed from z=0 to z=4 ...
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.