February 2008
... bright and it was easy to mark it’s yearly arrival. On January 1st this year, Sirius was right at due South at midnight. Sirius is twice as large as the Sun and has double it’s mass. It produces more than 20 times the light as the Sun. That isn’t really super bright, but since Sirius is only 8.6 lig ...
... bright and it was easy to mark it’s yearly arrival. On January 1st this year, Sirius was right at due South at midnight. Sirius is twice as large as the Sun and has double it’s mass. It produces more than 20 times the light as the Sun. That isn’t really super bright, but since Sirius is only 8.6 lig ...
Planisphere Exercise
... Use the planisphere you obtained in this course to answer the following questions: Note the location of the North Star at the end of the handle of the Little Dipper. It is located just beneath the brass fastener that holds the star wheel to the frame of the planisphere. As the night progresses, whic ...
... Use the planisphere you obtained in this course to answer the following questions: Note the location of the North Star at the end of the handle of the Little Dipper. It is located just beneath the brass fastener that holds the star wheel to the frame of the planisphere. As the night progresses, whic ...
The Inverse Square Law and Surface Area
... The Inverse Square Law The power received from a star per metre squared at the Earth is called the intensity (I) of the star’s radiation This is related to the power output per metre squared L of the star’s surface in this way ...
... The Inverse Square Law The power received from a star per metre squared at the Earth is called the intensity (I) of the star’s radiation This is related to the power output per metre squared L of the star’s surface in this way ...
Life Cycles of Stars
... • Equivalent to entire Earth’s nuclear arsenal going off one km away - every second • This energy output would last for days ...
... • Equivalent to entire Earth’s nuclear arsenal going off one km away - every second • This energy output would last for days ...
Sample Answer Sheet for The 10 Tourist Wonders of the
... Justification: Saturn is the second largest giant planet in our solar system, and a beautiful example of the class of planets which are made mostly of liquid and gas. While all four giant planets in our solar system have rings, only Saturn has a spectacular ring system worthy of any tour’s visit. Th ...
... Justification: Saturn is the second largest giant planet in our solar system, and a beautiful example of the class of planets which are made mostly of liquid and gas. While all four giant planets in our solar system have rings, only Saturn has a spectacular ring system worthy of any tour’s visit. Th ...
Stars Study Guide KEY
... 10. What is “apparent magnitude” and what does it depend on? It is how bright a star appears to our eyes as seen here on Earth. It depends on how far away the star is and how bright the star actually is (it’s absolute magnitude) 11. What is “absolute magnitude” and what does it depend on? It is how ...
... 10. What is “apparent magnitude” and what does it depend on? It is how bright a star appears to our eyes as seen here on Earth. It depends on how far away the star is and how bright the star actually is (it’s absolute magnitude) 11. What is “absolute magnitude” and what does it depend on? It is how ...
Background Information - Eu-Hou
... is B-V, which is simply an object’s magnitude as measured through the B filter, minus its magnitude as measured through the V filter. The luminosity of a star can be determined from its magnitude and distance. However, if you don’t know the distance to the star then you can’t find the luminosity. To ...
... is B-V, which is simply an object’s magnitude as measured through the B filter, minus its magnitude as measured through the V filter. The luminosity of a star can be determined from its magnitude and distance. However, if you don’t know the distance to the star then you can’t find the luminosity. To ...
BV Color Index and Temperature - The University of Texas at Dallas
... • B-V color index way of quantifying this - determining spectral class using two different filters Ø one a blue (B) filter that only lets a narrow range of colors or wavelengths through centered on the blue colors, Ø and a “visual” (V) filter that only lets the wavelengths close to the ...
... • B-V color index way of quantifying this - determining spectral class using two different filters Ø one a blue (B) filter that only lets a narrow range of colors or wavelengths through centered on the blue colors, Ø and a “visual” (V) filter that only lets the wavelengths close to the ...
Star Formation
... *Luminosity is how much energy the star emits *Absolute Magnitude is how bright the star would be if it was 10 parsecs away *B-V is a color metric, the difference in magnitude between the blue astronomical filter and the visible light filter *see The Brightness of Stars ppt. ...
... *Luminosity is how much energy the star emits *Absolute Magnitude is how bright the star would be if it was 10 parsecs away *B-V is a color metric, the difference in magnitude between the blue astronomical filter and the visible light filter *see The Brightness of Stars ppt. ...
Celestial Distances
... In contrast, most stars are constant in their luminosity (at least within a percent or two) ...
... In contrast, most stars are constant in their luminosity (at least within a percent or two) ...
Teaching ideas for Option E, Astrophysics
... The magnitude scale is confusing to students when they first meet it, so it is important to give many examples to make sure students understand that the smaller the magnitude the brighter the star appears to be. Students will always ask where the letters OBAFGKM for spectral classes come from. There ...
... The magnitude scale is confusing to students when they first meet it, so it is important to give many examples to make sure students understand that the smaller the magnitude the brighter the star appears to be. Students will always ask where the letters OBAFGKM for spectral classes come from. There ...
Document
... 1 parsec = 3.26 light years. Also d = 1/p Closest star, Proxima centauri, p = 0.772 arc seconds. Hence distance ‘d’ in parsec is d = 1/p = 1/0.772 = 1.3 parsec = 4.2 light years ...
... 1 parsec = 3.26 light years. Also d = 1/p Closest star, Proxima centauri, p = 0.772 arc seconds. Hence distance ‘d’ in parsec is d = 1/p = 1/0.772 = 1.3 parsec = 4.2 light years ...
Star Properties and Stellar Evolution
... What is the size of stars? Vary from the size of Earth to 2,000 times the size of the ...
... What is the size of stars? Vary from the size of Earth to 2,000 times the size of the ...
_____ 1. Which of the following statements is NOT true about stars
... 10. The red giants stage begins after the ___________________________ stage of a star. In this 3rd stage a red giant will _____________________ and ___________________ once it has used up all of its hydrogen. The center of the star will _________________ as the atmosphere begins to grow large. The m ...
... 10. The red giants stage begins after the ___________________________ stage of a star. In this 3rd stage a red giant will _____________________ and ___________________ once it has used up all of its hydrogen. The center of the star will _________________ as the atmosphere begins to grow large. The m ...
Problem set 3 solution
... The derivation in the text assumes that the smaller star is hotter, i.e. that the primary eclipse is when the smaller star passes behind the larger. Can we back this up with the data? Assuming this is true, then in the primary eclipse we see only the larger star, which gives 100(m0 −mp )/5 = 100(5.4 ...
... The derivation in the text assumes that the smaller star is hotter, i.e. that the primary eclipse is when the smaller star passes behind the larger. Can we back this up with the data? Assuming this is true, then in the primary eclipse we see only the larger star, which gives 100(m0 −mp )/5 = 100(5.4 ...
Lyra
Lyra (/ˈlaɪərə/; Latin for lyre, from Greek λύρα) is a small constellation. It is one of 48 listed by the 2nd century astronomer Ptolemy, and is one of the 88 constellations recognized by the International Astronomical Union. Lyra was often represented on star maps as a vulture or an eagle carrying a lyre, and hence sometimes referred to as Aquila Cadens or Vultur Cadens. Beginning at the north, Lyra is bordered by Draco, Hercules, Vulpecula, and Cygnus. Lyra is visible from the northern hemisphere from spring through autumn, and nearly overhead, in temperate latitudes, during the summer months. From the southern hemisphere, it is visible low in the northern sky during the winter months.The lucida or brightest star—and one of the brightest stars in the sky—is the white main sequence star Vega, a corner of the Summer Triangle. Beta Lyrae is the prototype of a class of stars known as Beta Lyrae variables, binary stars so close to each other that they become egg-shaped and material flows from one to the other. Epsilon Lyrae, known informally as the Double Double, is a complex multiple star system. Lyra also hosts the Ring Nebula, the second-discovered and best-known planetary nebula.