Cosmological Aspects of Nucleosynthesis
... At high densities: >4/3, because the electron becomes more degenerate At high temperatures: >4/3 because the particles become relativistic such that the energy gap for pair creation is no more important ...
... At high densities: >4/3, because the electron becomes more degenerate At high temperatures: >4/3 because the particles become relativistic such that the energy gap for pair creation is no more important ...
The Interstellar Medium
... an emission nebula, but is enough to give sufficient scattering to make the dust visible. Thus, the spectrum shown by reflection nebulae is similar to that of the illuminating stars, but bluer due to the efficiency with which blue light is scattered. ...
... an emission nebula, but is enough to give sufficient scattering to make the dust visible. Thus, the spectrum shown by reflection nebulae is similar to that of the illuminating stars, but bluer due to the efficiency with which blue light is scattered. ...
Herschel
... The Kuiper Belt The Kuiper Belt contains dust and small bodies, ices of methane, amonia, water etc. and dwarf planets like Pluto, Haumea, Makemake… Although from 1930 (F. Leonard), predictions were made about its existence (K. Edgeworth, 1943; G. Kuiper, 1951; A.G.W. Cameron, 1962; F. Whipple, 1964 ...
... The Kuiper Belt The Kuiper Belt contains dust and small bodies, ices of methane, amonia, water etc. and dwarf planets like Pluto, Haumea, Makemake… Although from 1930 (F. Leonard), predictions were made about its existence (K. Edgeworth, 1943; G. Kuiper, 1951; A.G.W. Cameron, 1962; F. Whipple, 1964 ...
Explores Angular Size - Chandra X
... how big something is in kilometers, instead of how big it appears to be in angular measure. To get this information, all we need to know is how far away the object is from us. The moon is 324,000 kilometers away, and Venus is about 40 million kilometers away from Earth at its closest distance. The f ...
... how big something is in kilometers, instead of how big it appears to be in angular measure. To get this information, all we need to know is how far away the object is from us. The moon is 324,000 kilometers away, and Venus is about 40 million kilometers away from Earth at its closest distance. The f ...
01_test_bank
... A) Earth's speed of revolution about the Sun, typical speeds of stars in the local solar neighborhood relative to us, Earth's speed of rotation on its axis, the speed of our solar system orbiting the center of the Milky Way Galaxy, the speeds of very distant galaxies relative to us B) Earth's speed ...
... A) Earth's speed of revolution about the Sun, typical speeds of stars in the local solar neighborhood relative to us, Earth's speed of rotation on its axis, the speed of our solar system orbiting the center of the Milky Way Galaxy, the speeds of very distant galaxies relative to us B) Earth's speed ...
A very massive runaway star from Cygnus OB2⋆
... v∗ is the spatial velocity of the star. The distance given in Eq. (5) assumes that the bow shock is bound by shock fronts on both sides. In reality, the non-zero cooling time of the shocked stellar wind builds up a thick layer of low-density, high-temperature gas between the reverse shock on the ste ...
... v∗ is the spatial velocity of the star. The distance given in Eq. (5) assumes that the bow shock is bound by shock fronts on both sides. In reality, the non-zero cooling time of the shocked stellar wind builds up a thick layer of low-density, high-temperature gas between the reverse shock on the ste ...
VISIBLE STARS AS APPARENT OBSERVATIONAL EVIDENCE IN
... Galileo Galilei promoted the Copernican Principle in his 1632 Dialogue Concerning the Two Chief World Systems, asserting that the stars are “so many suns” (p. 327) distributed through space so that “some are two or three times as remote as others” (p. ...
... Galileo Galilei promoted the Copernican Principle in his 1632 Dialogue Concerning the Two Chief World Systems, asserting that the stars are “so many suns” (p. 327) distributed through space so that “some are two or three times as remote as others” (p. ...
Stellar Evolution Task
... You will have noticed that some horizontal branch stars seemed to be above the normal region favoured by the others. These special stars are variable stars. Maybe you can spot them in the image of an old stellar cluster. These special stars are used to determine distance in our Galaxy. ...
... You will have noticed that some horizontal branch stars seemed to be above the normal region favoured by the others. These special stars are variable stars. Maybe you can spot them in the image of an old stellar cluster. These special stars are used to determine distance in our Galaxy. ...
The Resounding Universe
... hammer and the pitch of the sound produced. Using a monochord, he discovered that a different tension of the string corresponded to notes more or less consonant with respect to a reference note. This is what nowadays is referred to as interval of octave (obtained by halving the length of the string) ...
... hammer and the pitch of the sound produced. Using a monochord, he discovered that a different tension of the string corresponded to notes more or less consonant with respect to a reference note. This is what nowadays is referred to as interval of octave (obtained by halving the length of the string) ...
Animals in “Light, Energy, and the EM Spectrum” Comic
... Not only can mammals fly (bats), and reptiles fly (pterosaurs), but fish can fly as well! Flying fish make powerful, self-propelled leaps out of water into air, where their long, wing-like fins enable gliding flight for considerable distances above the water's surface. This uncommon ability is a nat ...
... Not only can mammals fly (bats), and reptiles fly (pterosaurs), but fish can fly as well! Flying fish make powerful, self-propelled leaps out of water into air, where their long, wing-like fins enable gliding flight for considerable distances above the water's surface. This uncommon ability is a nat ...
The Sky is holy
... Unfortunately, this sky map did not become popular among the people either. At the beginning of the 20th century, however, the names of many folk-astronomical constellations defined by Jakob Hurt were printed on the sky maps published in books. Paul-Egon Prüller later published several articles on t ...
... Unfortunately, this sky map did not become popular among the people either. At the beginning of the 20th century, however, the names of many folk-astronomical constellations defined by Jakob Hurt were printed on the sky maps published in books. Paul-Egon Prüller later published several articles on t ...
Lecture 20: Formation of Planets, Exoplanets 3/30
... first extrasolar planet observed in 1995. In Jan 2000, 28 observed and now about 3700 confirmed. Many systems with 2 or more observed planets • difficult to observe directly • mostly look for impact on Star: wobbles due to gravity of planets or reduction of light due to “eclipse” • If multiple plane ...
... first extrasolar planet observed in 1995. In Jan 2000, 28 observed and now about 3700 confirmed. Many systems with 2 or more observed planets • difficult to observe directly • mostly look for impact on Star: wobbles due to gravity of planets or reduction of light due to “eclipse” • If multiple plane ...
Astronomy - Bemidji State University
... back to a point of focus. This reflecting mirror acts like a light-collecting bucket: the bigger the bucket, the more light it can collect. The reflector telescope that Newton designed opened the door to magnifying objects millions of times--far beyond what could ever be obtained with a lens. Newton ...
... back to a point of focus. This reflecting mirror acts like a light-collecting bucket: the bigger the bucket, the more light it can collect. The reflector telescope that Newton designed opened the door to magnifying objects millions of times--far beyond what could ever be obtained with a lens. Newton ...
UCAC4 is a compiled, all-sky star catalog covering mainly the 8 to
... Proper motions have been derived for most of the about 113 million stars utilizing about 140 other star catalogs with significant epoch difference to the UCAC CCD observations. These data are supplemented by: - 2MASS photometric data for about 110 million stars and 5-band (B,V,g,r,i) - photometry fr ...
... Proper motions have been derived for most of the about 113 million stars utilizing about 140 other star catalogs with significant epoch difference to the UCAC CCD observations. These data are supplemented by: - 2MASS photometric data for about 110 million stars and 5-band (B,V,g,r,i) - photometry fr ...
The Peculiar Physics of Line-Driving
... * Massive, hot, luminous stars have strong stellar winds * Driven by line-scattering of stellar radiation * Highly unstable, leading to: ...
... * Massive, hot, luminous stars have strong stellar winds * Driven by line-scattering of stellar radiation * Highly unstable, leading to: ...
Lecture2 - UCSB Physics
... • Emission lines arise from gas “ionized” by very energetic radiation • Such high energy radiation is NOT produced by cold old stars, implying that very young stars (10 million years old) are present. • They also contain vast amounts of gas and dust ...
... • Emission lines arise from gas “ionized” by very energetic radiation • Such high energy radiation is NOT produced by cold old stars, implying that very young stars (10 million years old) are present. • They also contain vast amounts of gas and dust ...
What kind of stuff
... • Emission lines arise from gas “ionized” by very energetic radiation • Such high energy radiation is NOT produced by cold old stars, implying that very young stars (10 million years old) are present. • They also contain vast amounts of gas and dust ...
... • Emission lines arise from gas “ionized” by very energetic radiation • Such high energy radiation is NOT produced by cold old stars, implying that very young stars (10 million years old) are present. • They also contain vast amounts of gas and dust ...
Poster 49 | PDF (852 kB)
... Stephens & Leggett (2004). Note the four white dwarf observations that, when plotted in this plane, lie just to the left of the A0 end of the plotted sequence. (Fig 3., C. G. Tinney, et al. 2005) ...
... Stephens & Leggett (2004). Note the four white dwarf observations that, when plotted in this plane, lie just to the left of the A0 end of the plotted sequence. (Fig 3., C. G. Tinney, et al. 2005) ...
Solar-like oscillations in intermediate red giants
... Helioseismology is currently the best method for verifying stellar evolution modelling theories and for understanding the structure and interior processes within the sun. It was able to rule out the possibility that the solar neutrino problem was due to incorrect models. ...
... Helioseismology is currently the best method for verifying stellar evolution modelling theories and for understanding the structure and interior processes within the sun. It was able to rule out the possibility that the solar neutrino problem was due to incorrect models. ...
Telescopes: More Than Meets the Eye
... 1. What are the three main functions of a telescope? (the three main functions listed in order of importance are 1. light gathering 2. resolution 3. magnification) 2. What are some uses for a telescope? 3. Why does a stick appear to bend when it is placed partially in water? (refraction) Does it rea ...
... 1. What are the three main functions of a telescope? (the three main functions listed in order of importance are 1. light gathering 2. resolution 3. magnification) 2. What are some uses for a telescope? 3. Why does a stick appear to bend when it is placed partially in water? (refraction) Does it rea ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.