April 2011 - Skyscrapers, Inc.
... Before we can observe Saturn we first must locate this planet among all the stars in the night sky. A couple of years ago Saturn was within the easily recognizable constellation of Leo. Now the sixth planet from the Sun has moved into Virgo, whose pattern of stars is not that remarkable. However, on ...
... Before we can observe Saturn we first must locate this planet among all the stars in the night sky. A couple of years ago Saturn was within the easily recognizable constellation of Leo. Now the sixth planet from the Sun has moved into Virgo, whose pattern of stars is not that remarkable. However, on ...
chapter 14 - Astronomy
... (b) Type II: their spectrum contains prominent hydrogen lines; they originate from the explosion of a single star. 5. Type I supernovae are divided into three subclasses: (a) Type Ib, and Ic are caused by massive stars that have lost different proportions of their outer layers before exploding. (b) ...
... (b) Type II: their spectrum contains prominent hydrogen lines; they originate from the explosion of a single star. 5. Type I supernovae are divided into three subclasses: (a) Type Ib, and Ic are caused by massive stars that have lost different proportions of their outer layers before exploding. (b) ...
The Sculptor dwarf irregular galaxy SDIG: present and past
... which is derived from galaxy counts and measurements of galactic H I (Burstein & Heiles 1984). Given that SDIG is more than 10° away from the Sculptor dwarf spheroidal, a direct measurement is preferable. Thus, the authors adopt the RC3 value, namely E(B - v)gal = 0.00 mag. The internal extinction i ...
... which is derived from galaxy counts and measurements of galactic H I (Burstein & Heiles 1984). Given that SDIG is more than 10° away from the Sculptor dwarf spheroidal, a direct measurement is preferable. Thus, the authors adopt the RC3 value, namely E(B - v)gal = 0.00 mag. The internal extinction i ...
astronomy advisory panel strategy
... On the observational side, it is now possible to investigate galaxies at redshifts beyond 1 using our current 8-m class telescopes, VLT/Gemini, and by gravitational lensing or in cases of extreme luminosity, out to redshifts beyond 5. To study the formation and early evolution of galaxies which are ...
... On the observational side, it is now possible to investigate galaxies at redshifts beyond 1 using our current 8-m class telescopes, VLT/Gemini, and by gravitational lensing or in cases of extreme luminosity, out to redshifts beyond 5. To study the formation and early evolution of galaxies which are ...
ppt
... There are only two astronomical bodies that have a radius ~ 1.5 REarth: 1. White Dwarf 2. A terrestrial planet White Dwarfs have a mass of ~ 1 Solar Mass, so the radial velocity amplitude should be ~ 100s km/s. This is excluded by low precision radial velocity measurements. ...
... There are only two astronomical bodies that have a radius ~ 1.5 REarth: 1. White Dwarf 2. A terrestrial planet White Dwarfs have a mass of ~ 1 Solar Mass, so the radial velocity amplitude should be ~ 100s km/s. This is excluded by low precision radial velocity measurements. ...
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 ...
The Mighty Hunter in the Winter Sky By Shannon Jackson
... Five constellations are always in our northern sky. Other groupings appear seasonally, and then disappear as they fall below the horizon. There are five constellations, however, which seem to circle Polaris (po LAR us), also known as the North Star. The North Star always stays put while the other st ...
... Five constellations are always in our northern sky. Other groupings appear seasonally, and then disappear as they fall below the horizon. There are five constellations, however, which seem to circle Polaris (po LAR us), also known as the North Star. The North Star always stays put while the other st ...
H-R Diagram
... cores of giants and supergiants. 7. Classify: Proxima Centauri is the nearest star to the Sun. It has a luminosity of 0.0017 and a temperature of 3,000 K. A. Which star group does Proxima Centauri belong to? _________________________ B. On the H-R diagram, which star would Proxima Centauri be near? ...
... cores of giants and supergiants. 7. Classify: Proxima Centauri is the nearest star to the Sun. It has a luminosity of 0.0017 and a temperature of 3,000 K. A. Which star group does Proxima Centauri belong to? _________________________ B. On the H-R diagram, which star would Proxima Centauri be near? ...
Fulltext PDF
... star clusters are widely used as ideal samples to study stellar evolution as all other parameters are fixed, and the mass of stars defines it’s evolution. In the present times, they are also very useful in understanding star and planet formation as these are very closely linked processes, planet for ...
... star clusters are widely used as ideal samples to study stellar evolution as all other parameters are fixed, and the mass of stars defines it’s evolution. In the present times, they are also very useful in understanding star and planet formation as these are very closely linked processes, planet for ...
Stars and Galaxies
... In June 1995, scientists detected helium in the far reaches of the universe - consistent with an important aspect of the Big Bang theory that a mixture of hydrogen (75%) and helium (25%) was created at the beginning of the universe ...
... In June 1995, scientists detected helium in the far reaches of the universe - consistent with an important aspect of the Big Bang theory that a mixture of hydrogen (75%) and helium (25%) was created at the beginning of the universe ...
Stellar Evolution: Evolution: Birth, Life, and Death of Stars
... (brightness) as a function of temperature (spectral class); the ordinate "absolute magnitude" is a logarithmic measure of power. Most of the stars lie on the “main sequence”: massive stars are hot and have high power (top left), while the small stars have lower masses, are cold and have low power ...
... (brightness) as a function of temperature (spectral class); the ordinate "absolute magnitude" is a logarithmic measure of power. Most of the stars lie on the “main sequence”: massive stars are hot and have high power (top left), while the small stars have lower masses, are cold and have low power ...
NearInfrared
... windows exist. These are mostly in the near-infared and a couple in the midinfrared (around 10 and 20 micron). Furthermore, the atmosphere as well as the telescope itself, since they do have a finite temperature they also emit infared radiation. As a consequence the infrared sky from the ground is m ...
... windows exist. These are mostly in the near-infared and a couple in the midinfrared (around 10 and 20 micron). Furthermore, the atmosphere as well as the telescope itself, since they do have a finite temperature they also emit infared radiation. As a consequence the infrared sky from the ground is m ...
Death of Stars • Models of Star behavior can give estimates of how
... • Big stars are already hot at their centers and don’t need to compress their cores much to get to this temperature. • If 0.4M < M < 3M , the degeneracy point is hit first, then the Temperature rises above 100 Million K and Helium fusion starts. • But the pressure doesn’t change with temperature, ...
... • Big stars are already hot at their centers and don’t need to compress their cores much to get to this temperature. • If 0.4M < M < 3M , the degeneracy point is hit first, then the Temperature rises above 100 Million K and Helium fusion starts. • But the pressure doesn’t change with temperature, ...
Stars III - Indiana University Astronomy
... • The heaviest naturally occurring nucleus is uranium (atomic number 92). How do we get to uranium then? ...
... • The heaviest naturally occurring nucleus is uranium (atomic number 92). How do we get to uranium then? ...
SRP_Space_Lesson 5 - Scientist in Residence Program
... Stars move across the night sky throughout the night, they also move ‘off’ the sky depending on the season, or might not be visible at all from a given location. This might become easier to understand if we remember that it is not the stars that are moving, but the Earth. The movement of the stars t ...
... Stars move across the night sky throughout the night, they also move ‘off’ the sky depending on the season, or might not be visible at all from a given location. This might become easier to understand if we remember that it is not the stars that are moving, but the Earth. The movement of the stars t ...
chapter 2
... In order to identify the stars in a constellation, Greek alphabetical letters have been used. The Greek alphabet is as follows. Eta Nu Tau Alpha Beta ...
... In order to identify the stars in a constellation, Greek alphabetical letters have been used. The Greek alphabet is as follows. Eta Nu Tau Alpha Beta ...
Astro 3 Spring, 2004 (Prof
... -- Population II stars are old stars that have very few metals, i.e., they are mostly made of all hydrogen and helium. They represent a much older generation of stars that helped give rise to the population I stars. Cepheid Stars are variable stars, which means that they get brighter and dimmer in a ...
... -- Population II stars are old stars that have very few metals, i.e., they are mostly made of all hydrogen and helium. They represent a much older generation of stars that helped give rise to the population I stars. Cepheid Stars are variable stars, which means that they get brighter and dimmer in a ...
The Life Cycle of Stars
... stars? It was reasoned that these cooler stars have a greater surface area than the hotter, dim stars, resulting in more light being produced. The large, bright, cool stars are called red giants. The small, dim, hot stars are called white dwarfs. The hottest, most luminous stars are very large stars ...
... stars? It was reasoned that these cooler stars have a greater surface area than the hotter, dim stars, resulting in more light being produced. The large, bright, cool stars are called red giants. The small, dim, hot stars are called white dwarfs. The hottest, most luminous stars are very large stars ...
Project 5: Globular cluster
... A globular cluster is a spherical collection of stars that are very tightly bound to each other by gravity. Globular clusters orbit around the Milky Way galaxy core like satellites. The number of stars in a globular cluster varies from a few thousand up to a million stars for the m ...
... A globular cluster is a spherical collection of stars that are very tightly bound to each other by gravity. Globular clusters orbit around the Milky Way galaxy core like satellites. The number of stars in a globular cluster varies from a few thousand up to a million stars for the m ...
Krupp (1999) broadly defines the interdisciplinary field
... The night-adapted naked eye, under dark, moonless skies at sea level, may discern stars as faint as magnitude 6. (In the astronomical apparent-magnitude scale, increasing brightest corresponds to smaller numbers.) However, these conditions rarely exist on Rapa Nui, even in pre-historic times. It se ...
... The night-adapted naked eye, under dark, moonless skies at sea level, may discern stars as faint as magnitude 6. (In the astronomical apparent-magnitude scale, increasing brightest corresponds to smaller numbers.) However, these conditions rarely exist on Rapa Nui, even in pre-historic times. It se ...
Slide 1
... No matter the size of the star or whether it dies quietly or in a supernova, all stars will form a planetary nebula. The nebula is made out of the gases that got blown from the star. It may look like it expands slowly, but these gases move out at an average of 30 miles/second. Most of this is hydrog ...
... No matter the size of the star or whether it dies quietly or in a supernova, all stars will form a planetary nebula. The nebula is made out of the gases that got blown from the star. It may look like it expands slowly, but these gases move out at an average of 30 miles/second. Most of this is hydrog ...
doc - Jnoodle
... The stars "near" us form the Milky Way, a galaxy containing ca 100 billion stars shaped like a disc with some spiral arms. The size of our galaxy is the order of magnitude 100 000 ly and it rotates around its center in ca 200 - 300 million years. Except start there is mostly thin interstellar matter ...
... The stars "near" us form the Milky Way, a galaxy containing ca 100 billion stars shaped like a disc with some spiral arms. The size of our galaxy is the order of magnitude 100 000 ly and it rotates around its center in ca 200 - 300 million years. Except start there is mostly thin interstellar matter ...
Pulsating Variable Stars and The Hertzsprung - Chandra X
... to losses caused by frictional forces), and eventually this loss of energy should result in a damping or lessening of the pulsations. The prevalence and regularity of pulsating stars imply that the dissipated energy is replenished in some way. The dynamics of pulsating variable stars is complicated ...
... to losses caused by frictional forces), and eventually this loss of energy should result in a damping or lessening of the pulsations. The prevalence and regularity of pulsating stars imply that the dissipated energy is replenished in some way. The dynamics of pulsating variable stars is complicated ...
stars-notes
... as seen from Earth. The absolute magnitude is the brightness that a star would have at a distance of 32.6 light-years from Earth. • If all stars were the same distance away, their absolute magnitudes would be the same as their apparent magnitudes. ...
... as seen from Earth. The absolute magnitude is the brightness that a star would have at a distance of 32.6 light-years from Earth. • If all stars were the same distance away, their absolute magnitudes would be the same as their apparent magnitudes. ...
What color are stars?
... Monitoring how binary stars move provide information about stellar masses ...
... Monitoring how binary stars move provide information about stellar masses ...
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.