The Sun and Stars The Sun is a typical star with a mass of about 2
... For the fusion reaction to occur very high temperatures are needed, on the order of 107 K, which are achieved in the core of the star. The sun’s luminosity of L = 3.8 × 1026 Watts is produced by transforming 4.5 × 109 kilograms of mass into energy each second due to the fusion of 600 million metric ...
... For the fusion reaction to occur very high temperatures are needed, on the order of 107 K, which are achieved in the core of the star. The sun’s luminosity of L = 3.8 × 1026 Watts is produced by transforming 4.5 × 109 kilograms of mass into energy each second due to the fusion of 600 million metric ...
Today`s Powerpoint
... - Eventually, shells thrown off star altogether! 0.1 - 0.2 MSun ejected. - Shells appear as a nebula around star, called "Planetary Nebula" (awful, historical name, nothing to do with planets). ...
... - Eventually, shells thrown off star altogether! 0.1 - 0.2 MSun ejected. - Shells appear as a nebula around star, called "Planetary Nebula" (awful, historical name, nothing to do with planets). ...
The Milky Way – A Classic Galaxy
... light variation to show them as Cepheids • Therefore, this was not a nearby nebula around a new star, it was an entire galaxy. • Herschel’s map then could be seen as a map of our own Milky Way Galaxy ...
... light variation to show them as Cepheids • Therefore, this was not a nearby nebula around a new star, it was an entire galaxy. • Herschel’s map then could be seen as a map of our own Milky Way Galaxy ...
16. Properties of Stars
... How can we learn about the lives of stars, which last millions to billions of years? • By taking observations of many stars, we can study stars in many phases of life, just as we might study how humans age by observing the humans living in a village at one time. What two basic physical properties do ...
... How can we learn about the lives of stars, which last millions to billions of years? • By taking observations of many stars, we can study stars in many phases of life, just as we might study how humans age by observing the humans living in a village at one time. What two basic physical properties do ...
The Properties of Stars
... The blue star (A) is moving away from us, so its spectrum is red-shifted while that of the red star (B) is blue-shifted. When the stars arrive at the points P, Q, R, and S they are moving across our line of sight so we see no redshift. ...
... The blue star (A) is moving away from us, so its spectrum is red-shifted while that of the red star (B) is blue-shifted. When the stars arrive at the points P, Q, R, and S they are moving across our line of sight so we see no redshift. ...
27.1: Characteristics of Stars
... About 3 billion can be seen through ground-based telescopes Over 1 trillion can be observed from the Hubble Space Telescope The visibility of a star depends on its brightness and its distance from the Earth. Astronomers use two scales to describe the brightness of a star: apparent magnitude and abso ...
... About 3 billion can be seen through ground-based telescopes Over 1 trillion can be observed from the Hubble Space Telescope The visibility of a star depends on its brightness and its distance from the Earth. Astronomers use two scales to describe the brightness of a star: apparent magnitude and abso ...
What is a star?
... How is star brightness measured? • Astronomers used telescopes see many stars that are too dim to see with the unaided eye. They added to the magnitude system. • Today, the brightest stars have a magnitude of about –2, and the faintest stars that we can see with a telescope have a magnitude of +30. ...
... How is star brightness measured? • Astronomers used telescopes see many stars that are too dim to see with the unaided eye. They added to the magnitude system. • Today, the brightest stars have a magnitude of about –2, and the faintest stars that we can see with a telescope have a magnitude of +30. ...
Photometric analysis of the globular cluster NGC5466
... show clearly the position of NGC5466 (Fig. 2). NGC5466 is also one of the least dense known glob- ...
... show clearly the position of NGC5466 (Fig. 2). NGC5466 is also one of the least dense known glob- ...
Interpreting the HR diagram of stellar clusters
... There are very massive, hot, blue stars at the top-left of the HR diagram, as well as low-mass, cool, red stars at the bottom-right. Now, in real life, the stars in a giant molecular cloud don't all finish contracting and begin to fuse hydrogen simultaneously; there is always a small spread of seve ...
... There are very massive, hot, blue stars at the top-left of the HR diagram, as well as low-mass, cool, red stars at the bottom-right. Now, in real life, the stars in a giant molecular cloud don't all finish contracting and begin to fuse hydrogen simultaneously; there is always a small spread of seve ...
Stellar Evolution (Powerpoint) 17
... observable universe, since they are so bright. • Huge amount of observational effort today is going into discovering and charting the light curve of SN I’s throughout the universe! ...
... observable universe, since they are so bright. • Huge amount of observational effort today is going into discovering and charting the light curve of SN I’s throughout the universe! ...
d = 1 / p
... amount of energy per second (power) emitted by a blackbody per unit of surface area as determined by its temperature. So if we know the total power emitted by a star (its luminosity), and we know its temperature from Wien's law, we can calculate its total surface area – and determine its size. To do ...
... amount of energy per second (power) emitted by a blackbody per unit of surface area as determined by its temperature. So if we know the total power emitted by a star (its luminosity), and we know its temperature from Wien's law, we can calculate its total surface area – and determine its size. To do ...
d = 1 / p
... intrinsic brightness, or luminosity – the total energy the star emits per second. Imagine building a gigantic shell centered around the star, giving that shell a radius d equal to the distance between the star and Earth. A detector placed on the inside of the shell receives a certain amount of energ ...
... intrinsic brightness, or luminosity – the total energy the star emits per second. Imagine building a gigantic shell centered around the star, giving that shell a radius d equal to the distance between the star and Earth. A detector placed on the inside of the shell receives a certain amount of energ ...
The HR Diagram - Faculty Web Pages
... How about Epsilon Eridani? Is it more or less massive than the Sun? Why? __________________________________________________________________________________ ____________________________________________________________________________ ...
... How about Epsilon Eridani? Is it more or less massive than the Sun? Why? __________________________________________________________________________________ ____________________________________________________________________________ ...
guide to orion 3-d flythrough
... young stars are nearly spherical. New stars are created when knots of dust and gas collapse. In the nebula, however, this process stopped when the young central stars reached their full power. The radiation they produce is so strong that it prevents new stars from forming. ...
... young stars are nearly spherical. New stars are created when knots of dust and gas collapse. In the nebula, however, this process stopped when the young central stars reached their full power. The radiation they produce is so strong that it prevents new stars from forming. ...
bright - TutorPlus
... • Stars can be classified into characteristic types depending on their position on the H-R diagram. • Most stars line up along a slightly curved diagonal line called the main sequence. Our Sun is located on the main sequence. • On the main sequence, low mass stars tend to be cooler and less bright w ...
... • Stars can be classified into characteristic types depending on their position on the H-R diagram. • Most stars line up along a slightly curved diagonal line called the main sequence. Our Sun is located on the main sequence. • On the main sequence, low mass stars tend to be cooler and less bright w ...
Auriga (constellation)
Auriga is one of the 48 constellations listed by the 2nd-century astronomer Ptolemy and remains one of the 88 modern constellations. Located north of the celestial equator, its name is the Latin word for ""charioteer"", associating it with various mythological charioteers, including Erichthonius and Myrtilus. Auriga is most prominent during winter evenings in the Northern Hemisphere, along with the five other constellations that have stars in the Winter Hexagon asterism. Because of its northern declination, Auriga is only visible in its entirety as far as 34° south; for observers farther south it lies partially or fully below the horizon. A large constellation, with an area of 657 square degrees, it is half the size of the largest constellation, Hydra.Its brightest star, Capella, is an unusual multiple star system among the brightest stars in the night sky. Beta Aurigae is an interesting variable star in the constellation; Epsilon Aurigae, a nearby eclipsing binary with an unusually long period, has been studied intensively. Because of its position near the winter Milky Way, Auriga has many bright open clusters in its borders, including M36, M37, and M38, popular targets for amateur astronomers. In addition, it has one prominent nebula, the Flaming Star Nebula, associated with the variable star AE Aurigae.In Chinese mythology, Auriga's stars were incorporated into several constellations, including the celestial emperors' chariots, made up of the modern constellation's brightest stars. Auriga is home to the radiant for the Aurigids, Zeta Aurigids, Delta Aurigids, and the hypothesized Iota Aurigids.