January 2006
... spectral type (or temperature) • To obtain a HR diagram: – get the luminosity. This is your y-coordinate. – Then take the spectral type as your x-coordinate. This may look strange, e.g. K5III for Aldebaran. Ignore the roman numbers ( III means a giant star, V means dwarf star, etc). First letter is ...
... spectral type (or temperature) • To obtain a HR diagram: – get the luminosity. This is your y-coordinate. – Then take the spectral type as your x-coordinate. This may look strange, e.g. K5III for Aldebaran. Ignore the roman numbers ( III means a giant star, V means dwarf star, etc). First letter is ...
CO 2 Cycle
... carried sediment in the past several years…The atmosphere on Mars is so thin that liquid water cannot persist at the surface. However, researchers propose that water could remain liquid long enough, after breaking out from an underground source, to carry debris before totally evaporating and freezin ...
... carried sediment in the past several years…The atmosphere on Mars is so thin that liquid water cannot persist at the surface. However, researchers propose that water could remain liquid long enough, after breaking out from an underground source, to carry debris before totally evaporating and freezin ...
Introduction to the Celestial Sphere
... If you watch the skies for a few hours, you will note the apparent motion of this fictitious celestial sphere and all things on it. This apparent motion is caused by the spinning motion (rotation) of the Earth on its axis. ...
... If you watch the skies for a few hours, you will note the apparent motion of this fictitious celestial sphere and all things on it. This apparent motion is caused by the spinning motion (rotation) of the Earth on its axis. ...
Celestial Distances - Wayne State University
... In a normal star, the pressure and gravity balance In a variable star, the pressure and gravity are out of ...
... In a normal star, the pressure and gravity balance In a variable star, the pressure and gravity are out of ...
The dying sun/ creation of elements
... New physics: At sufficiently high density, quantum mechanical pressure comes in. It is independent of temperature. Will discuss this next class. No more fusion means sun becomes inert. White dwarf. ...
... New physics: At sufficiently high density, quantum mechanical pressure comes in. It is independent of temperature. Will discuss this next class. No more fusion means sun becomes inert. White dwarf. ...
TMSP Stellar Evolution & Life
... hottest to the coolest. Colours, temperatures, and masses of stars are all plotted on an H&R diagram. Most stars we see are plotted on a graph on the H&R called the Main Sequence. Red Giants and White Dwarfs are no longer Main Sequence stars! ...
... hottest to the coolest. Colours, temperatures, and masses of stars are all plotted on an H&R diagram. Most stars we see are plotted on a graph on the H&R called the Main Sequence. Red Giants and White Dwarfs are no longer Main Sequence stars! ...
Stars: from Adolescence to Old Age
... Shell burning starts •outer layers of star expand •core continues to contract ...
... Shell burning starts •outer layers of star expand •core continues to contract ...
September 3 and 5 slides
... Curtis noted that many of the spirals had dark, thick bands of obscuring material and gave 3 big “ifs”: (1) if the MW has such a band, (2) if we are located in the mid-plane of the band, and (3) if the spirals are located outside the MW, then the Zone of Avoidance is caused by the obscuring material ...
... Curtis noted that many of the spirals had dark, thick bands of obscuring material and gave 3 big “ifs”: (1) if the MW has such a band, (2) if we are located in the mid-plane of the band, and (3) if the spirals are located outside the MW, then the Zone of Avoidance is caused by the obscuring material ...
Friday, April 25 - Otterbein University
... Herschel’s Findings • Stars thinned out very fast at right angles to Milky Way • In the plane of the Milky Way the thinning was slower and depended upon the direction in which he looked • Flaws: – Observations made only in visible spectrum – Did not take into account absorption by interstellar gas ...
... Herschel’s Findings • Stars thinned out very fast at right angles to Milky Way • In the plane of the Milky Way the thinning was slower and depended upon the direction in which he looked • Flaws: – Observations made only in visible spectrum – Did not take into account absorption by interstellar gas ...
The Scale of the Realms of the Universe
... • This region is inside a large bubble of hot interstellar gas called the Local Bubble. Here the gas temperature is about 1 million degrees Kelvin, and the density is 1,000 times less than average interstellar space. Milky Way Galaxy • The Milky Way Galaxy is a giant disk of stars 160,000 light-year ...
... • This region is inside a large bubble of hot interstellar gas called the Local Bubble. Here the gas temperature is about 1 million degrees Kelvin, and the density is 1,000 times less than average interstellar space. Milky Way Galaxy • The Milky Way Galaxy is a giant disk of stars 160,000 light-year ...
astronomy webquest…… explore the universe
... http://outreach.atnf.csiro.au/education/everyone/pulsars/ ...
... http://outreach.atnf.csiro.au/education/everyone/pulsars/ ...
The double-degenerate, super-Chandrasekhar nucleus of the
... The hypothesis of binarity as a key to produce bipolar PNe has been progressively gaining ground, particularly with the recent discovery of many new close binary PN nuclei5,6,7,8 . To this end, we have undertaken a campaign of photometric monitoring of PN central stars that show characteristic featu ...
... The hypothesis of binarity as a key to produce bipolar PNe has been progressively gaining ground, particularly with the recent discovery of many new close binary PN nuclei5,6,7,8 . To this end, we have undertaken a campaign of photometric monitoring of PN central stars that show characteristic featu ...
Chapter 13
... • Aristotle wrote more than 2000 years ago that stars are heated by their passage through the heavens, but never considered that they evolved • In the 18th century, Immanuel Kant described the Sun as a fiery sphere, formed from the gases gravitated to the center of a solar nebula • In the 1850s and ...
... • Aristotle wrote more than 2000 years ago that stars are heated by their passage through the heavens, but never considered that they evolved • In the 18th century, Immanuel Kant described the Sun as a fiery sphere, formed from the gases gravitated to the center of a solar nebula • In the 1850s and ...
Stellar Parallax
... Stellar Brightness We do this with the following arbitarary definition:M = m when the star is viewed from a distance d = 10 pc. Then M = m -5 log10d + 5 We now have a link between M,m and d where d is in parsecs. [Note: we have assumed that the inverse square law is the only reason for the dimming ...
... Stellar Brightness We do this with the following arbitarary definition:M = m when the star is viewed from a distance d = 10 pc. Then M = m -5 log10d + 5 We now have a link between M,m and d where d is in parsecs. [Note: we have assumed that the inverse square law is the only reason for the dimming ...
Diapositiva 1
... On a series of direct photographs taken with the Crosslyer reflector in 1946 and 1947 and centered on the diffuse nebula NGC 1999, there appear several peculiar nebulous objects. The brightest of these (referred to hereafter as "No. 1") resembles, on the best plates, a slightly diffuse star with a v ...
... On a series of direct photographs taken with the Crosslyer reflector in 1946 and 1947 and centered on the diffuse nebula NGC 1999, there appear several peculiar nebulous objects. The brightest of these (referred to hereafter as "No. 1") resembles, on the best plates, a slightly diffuse star with a v ...
Cygnus (constellation)
Cygnus /ˈsɪɡnəs/ is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan. The swan is one of the most recognizable constellations of the northern summer and autumn, it features a prominent asterism known as the Northern Cross (in contrast to the Southern Cross). Cygnus was among the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations.Cygnus contains Deneb, one of the brightest stars in the night sky and one corner of the Summer Triangle, as well as some notable X-ray sources and the giant stellar association of Cygnus OB2. One of the stars of this association, NML Cygni, is one of the largest stars currently known. The constellation is also home to Cygnus X-1, a distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a black hole. Many star systems in Cygnus have known planets as a result of the Kepler Mission observing one patch of the sky, the patch is the area around Cygnus. In addition, most of the eastern part of Cygnus is dominated by the Hercules–Corona Borealis Great Wall, a giant galaxy filament that is the largest known structure in the observable universe; covering most of the northern sky.