December
... Fully one-third of the 1st magnitude stars visible in the sky (seven of twenty-one) are in the Winter Circle with Sirius, Procyon, Pollux - toss in 2nd magnitude Castor - Capella, Aldebaran, and Rigel on the periphery, and Betelgeuse located off-center. Although somewhat flattened, and thus more ell ...
... Fully one-third of the 1st magnitude stars visible in the sky (seven of twenty-one) are in the Winter Circle with Sirius, Procyon, Pollux - toss in 2nd magnitude Castor - Capella, Aldebaran, and Rigel on the periphery, and Betelgeuse located off-center. Although somewhat flattened, and thus more ell ...
PHYSICS 1500 - ASTRONOMY TOTAL: 100 marks Section A Please
... of gravity pulling inwards, balanced against some other force pushing outwards. (a) ...
... of gravity pulling inwards, balanced against some other force pushing outwards. (a) ...
Notes - Michigan State University
... • core shrinks until degeneracy pressure sets in and halts collapse star is HOT (gravitational energy !) star is small WD M-R relation Hamada-Salpeter Ap.J. 134 (1961) 683 ...
... • core shrinks until degeneracy pressure sets in and halts collapse star is HOT (gravitational energy !) star is small WD M-R relation Hamada-Salpeter Ap.J. 134 (1961) 683 ...
printer-friendly version of benchmark
... temperature, composition, luminosity, mass, motion, and more. Some characteristics are directly observable (such as temperature and some motions), while others (such as mass) require inference from other data. Of these characteristics, the most important are color, temperature, mass, and luminosity. ...
... temperature, composition, luminosity, mass, motion, and more. Some characteristics are directly observable (such as temperature and some motions), while others (such as mass) require inference from other data. Of these characteristics, the most important are color, temperature, mass, and luminosity. ...
Chapter three: The properties of Stars
... Chapter three: The properties of Stars When we look up into the sky in a clear night, all of the stars locate at the inner surface of a sphere called celestial sphere and they seem to be at same distance from us. However this is just a projection effect. For the stars we can see with our unaided eye ...
... Chapter three: The properties of Stars When we look up into the sky in a clear night, all of the stars locate at the inner surface of a sphere called celestial sphere and they seem to be at same distance from us. However this is just a projection effect. For the stars we can see with our unaided eye ...
March 2010 - Pomona Valley Amateur Astronomers
... In science fiction stories, aliens often proclaim that they "come from a nearby galaxy." For astronomers this seems to be a joke, the close Sagittarius Dwarf Galaxy (NGC 6822) is a million light years away. That's a long was for any alien to travel. This telescopic object, discovered by E. E. Barnar ...
... In science fiction stories, aliens often proclaim that they "come from a nearby galaxy." For astronomers this seems to be a joke, the close Sagittarius Dwarf Galaxy (NGC 6822) is a million light years away. That's a long was for any alien to travel. This telescopic object, discovered by E. E. Barnar ...
What units are used in astronomical photometry?
... luminance, intensity, or "specific intensity". This is sometimes also called "surface brightness". Still another unit for intensity is magnitudes per square arcsec, which is the magnitude at which each square arcsec of an extended light source shines. ...
... luminance, intensity, or "specific intensity". This is sometimes also called "surface brightness". Still another unit for intensity is magnitudes per square arcsec, which is the magnitude at which each square arcsec of an extended light source shines. ...
ASTR-1020: Astronomy II Course Lecture Notes - Faculty
... Heavier stars like our Sun can retain lithium in their outer atmospheres due to the fact that the convection zone of these stars do not extend very deep into the star and these outer layers never get hot enough to deplete lithium through fusion. However these stars are easily distinguishable from br ...
... Heavier stars like our Sun can retain lithium in their outer atmospheres due to the fact that the convection zone of these stars do not extend very deep into the star and these outer layers never get hot enough to deplete lithium through fusion. However these stars are easily distinguishable from br ...
How Bright is that star?
... Relates luminosity, temperature and Radius of a star. The luminosity/meter² (l), is determined by the temperature (T) of that area ) l = σT⁴ (σ is a constant which if T is in °K, l comes out in Watts) Surface area is determined by radius(R): A = 4πR² So the total Lumnosity of star becomes L = 4πR²σT ...
... Relates luminosity, temperature and Radius of a star. The luminosity/meter² (l), is determined by the temperature (T) of that area ) l = σT⁴ (σ is a constant which if T is in °K, l comes out in Watts) Surface area is determined by radius(R): A = 4πR² So the total Lumnosity of star becomes L = 4πR²σT ...
mass of star
... When a cloud starts to collapse, it should fragment. Fragments then collapse on their own, fragmenting further. End product is 100’s or 1000’s of dense clumps each destined to form star, binary star, etc. Hence a cloud gives birth to a cluster of stars. ...
... When a cloud starts to collapse, it should fragment. Fragments then collapse on their own, fragmenting further. End product is 100’s or 1000’s of dense clumps each destined to form star, binary star, etc. Hence a cloud gives birth to a cluster of stars. ...
What color are stars?
... Mass transfer in close binary systems can produce unusual double stars • Close binary systems are where only a few stellar diameters, or less, separate the stars • Mass can be dramatically transferred between the stars – detached binary (no mass transfer) – semidetached binary(material can flow acr ...
... Mass transfer in close binary systems can produce unusual double stars • Close binary systems are where only a few stellar diameters, or less, separate the stars • Mass can be dramatically transferred between the stars – detached binary (no mass transfer) – semidetached binary(material can flow acr ...
Astronomy Assignment #1
... and state your answer in a complete sentence. Failure to complete all three of these tasks will result in less than full credit awarded. The Instructor assigned topic must be typed. Text Problems: Answer the following Review Questions from Nick Strobel’s AstronomyNotes: Chapter 3: Astronomy Without ...
... and state your answer in a complete sentence. Failure to complete all three of these tasks will result in less than full credit awarded. The Instructor assigned topic must be typed. Text Problems: Answer the following Review Questions from Nick Strobel’s AstronomyNotes: Chapter 3: Astronomy Without ...
10 New Constellations
... Also known as Alpha Persei, Mirfak is located around 500 light years from Earth and is the brightest star in the constellation, it's a white supergiant with a diameter around 30 times larger than the sun. Algol Also known as Beta Persei, Algol is actually a three star system located around 90 light ...
... Also known as Alpha Persei, Mirfak is located around 500 light years from Earth and is the brightest star in the constellation, it's a white supergiant with a diameter around 30 times larger than the sun. Algol Also known as Beta Persei, Algol is actually a three star system located around 90 light ...
The Hertzsprung-Russell Diagram
... Equal Radius Lines In general the hotter the star is the brighter it will be. Thus you would expect stars of the same size but different temperatures to form a diagonal line called an equal radius line. Equal Radius lines can be added to an H-R diagram ...
... Equal Radius Lines In general the hotter the star is the brighter it will be. Thus you would expect stars of the same size but different temperatures to form a diagonal line called an equal radius line. Equal Radius lines can be added to an H-R diagram ...
Powerpoint
... determine temperature from spectrum (black-body curve or spectral lines), then find surface area, Surface area Luminosity / (temperature) 4 then find radius (sphere surface area is 4 R2) ...
... determine temperature from spectrum (black-body curve or spectral lines), then find surface area, Surface area Luminosity / (temperature) 4 then find radius (sphere surface area is 4 R2) ...
Cassiopeia (constellation)
Cassiopeia is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivalled beauty. Cassiopeia was one of the 48 constellations listed by the 2nd-century Greek astronomer Ptolemy, and it remains one of the 88 modern constellations today. It is easily recognizable due to its distinctive 'M' shape when in upper culmination but in higher northern locations when near lower culminations in spring and summer it has a 'W' shape, formed by five bright stars. It is bordered by Andromeda to the south, Perseus to the southeast, and Cepheus to the north. It is opposite the Big Dipper.In northern locations above 34ºN latitude it is visible year-round and in the (sub)tropics it can be seen at its clearest from September to early November in its characteristic 'M' shape. Even in low southern latitudes below 25ºS is can be seen low in the North.