Life Cycle of a Star
... Sequence (the Sun) 2nd stage Longest stage Hydrogen changes into helium which creates enormous amounts of energy The size of the star does not change much ...
... Sequence (the Sun) 2nd stage Longest stage Hydrogen changes into helium which creates enormous amounts of energy The size of the star does not change much ...
Quantum Well Electron Gain Structures and Infrared
... consistent with MC) • With distance L > 4x106 L0 (similar to Eta Car and Pistol Star) • Implies mass > 150 M0 (Eddington-based) • Not a cluster; is it a binary?? Even if binary, minimum mass > 75 M0 • So … • SGR = neutron star already; if same birthdate, progenitor must have been more massive than ...
... consistent with MC) • With distance L > 4x106 L0 (similar to Eta Car and Pistol Star) • Implies mass > 150 M0 (Eddington-based) • Not a cluster; is it a binary?? Even if binary, minimum mass > 75 M0 • So … • SGR = neutron star already; if same birthdate, progenitor must have been more massive than ...
PC2491 Examples 2
... (4) Estimate the mean free path of a star in a region where the stellar density is 1 star pc-3 and typical stellar velocities are 10 km s-1 (assume all stars 1Mo). In the same region hydrogen atoms have a density of 106 m-3. Assume the hydrogen atoms to be elastic spheres of radius 10-8 m and only i ...
... (4) Estimate the mean free path of a star in a region where the stellar density is 1 star pc-3 and typical stellar velocities are 10 km s-1 (assume all stars 1Mo). In the same region hydrogen atoms have a density of 106 m-3. Assume the hydrogen atoms to be elastic spheres of radius 10-8 m and only i ...
When Stars Blow Up
... degenerate •When the temperature reaches a few MK, fusion begins •Degenerate fusion is a runaway. •All the H fuses to He and heavier elements in a soundcrossing time (a few minutes) •The star increases in brightness ~ 10,000 times •Most of the matter is ejected ...
... degenerate •When the temperature reaches a few MK, fusion begins •Degenerate fusion is a runaway. •All the H fuses to He and heavier elements in a soundcrossing time (a few minutes) •The star increases in brightness ~ 10,000 times •Most of the matter is ejected ...
Astro 10 Practice Test 3
... Choose the ONE best answer and mark it on your Parscore form. 10. The Sun is currently undergoing mass loss. What do we call the physical manifestation of this process? a. Sunspots b. The solar wind c. The Sun’s photosphere d. The Sun’s chromosphere 11. What special type of stellar remnant did Zwick ...
... Choose the ONE best answer and mark it on your Parscore form. 10. The Sun is currently undergoing mass loss. What do we call the physical manifestation of this process? a. Sunspots b. The solar wind c. The Sun’s photosphere d. The Sun’s chromosphere 11. What special type of stellar remnant did Zwick ...
stars concept review
... b. a large cloud of gas and dust in space where stars are born c. a shrinking, spinning region in space with a central concentration of matter d. a large explosion on a star that makes it brighter e. an object so dense that even light cannot escape its gravity ...
... b. a large cloud of gas and dust in space where stars are born c. a shrinking, spinning region in space with a central concentration of matter d. a large explosion on a star that makes it brighter e. an object so dense that even light cannot escape its gravity ...
wk09noQ
... time it takes to finish burning hydrogen in its core) depends on its mass • Stars like the Sun have main sequence lifetimes of several billion years; Less massive stars have longer lifetimes; more massive stars have shorter lifetimes (as short as a few million years) • A given star spends most of it ...
... time it takes to finish burning hydrogen in its core) depends on its mass • Stars like the Sun have main sequence lifetimes of several billion years; Less massive stars have longer lifetimes; more massive stars have shorter lifetimes (as short as a few million years) • A given star spends most of it ...
CH27.2 Stellar Evolution
... - when almost all the hydrogen has been fused to helium. The core of the star contracts causing higher temperatures and the helium to be fused into carbon atoms. ...
... - when almost all the hydrogen has been fused to helium. The core of the star contracts causing higher temperatures and the helium to be fused into carbon atoms. ...
doc - IAC
... massive. They stand out because of their high luminosity. These stars can become a million times brighter than the Sun. Their masses can be measured dynamically, in the same way as planetary masses are measured. The most massive ones are 100 to 150 times heavier than the Sun. The most massive stars ...
... massive. They stand out because of their high luminosity. These stars can become a million times brighter than the Sun. Their masses can be measured dynamically, in the same way as planetary masses are measured. The most massive ones are 100 to 150 times heavier than the Sun. The most massive stars ...
PHYS299B_Final_HudsonJustin
... brightest star is blocked by the other creating the eclipsing effect like when Earth experiences a solar eclipse. The smaller dips in brightness is when the brighter star blocks out the light from the other star when passing in front of it. • From these curves, we can tell if stars follow the charac ...
... brightest star is blocked by the other creating the eclipsing effect like when Earth experiences a solar eclipse. The smaller dips in brightness is when the brighter star blocks out the light from the other star when passing in front of it. • From these curves, we can tell if stars follow the charac ...
Chapter 25 Beyond Our Solar System
... Three factors control the apparent brightness of a star as seen from Earth: how big it is, how hot it is, and how far away it is. • A star’s brightness as it appears form Earth is called its apparent magnitude. • Astronomers are also interested in how bright a star actually is, or its absolute magni ...
... Three factors control the apparent brightness of a star as seen from Earth: how big it is, how hot it is, and how far away it is. • A star’s brightness as it appears form Earth is called its apparent magnitude. • Astronomers are also interested in how bright a star actually is, or its absolute magni ...
The hierarchical structure of the Universe (go from little to large)
... A The light of a few billion stars washed together. B A reflection of sunlight in Earth’s atmosphere. C A reflection of sunlight on dust particles in the ...
... A The light of a few billion stars washed together. B A reflection of sunlight in Earth’s atmosphere. C A reflection of sunlight on dust particles in the ...
The Constellation Microscopium, the Microscope Microscopium is a
... spectral type G7III. Epsilon Microscopii lies 165 light years away, and is a blue-white main sequence star of apparent magnitude 4.7, and spectral type A1V. Theta1 and Theta2 Microscopii make up a wide double whose components are splittable to the naked eye. Both are white A-class magnetic spectrum ...
... spectral type G7III. Epsilon Microscopii lies 165 light years away, and is a blue-white main sequence star of apparent magnitude 4.7, and spectral type A1V. Theta1 and Theta2 Microscopii make up a wide double whose components are splittable to the naked eye. Both are white A-class magnetic spectrum ...
Space Key Word Search
... supermassive black holes; radiation is emitted into space as material falls into a black hole, usually at the center of a galaxy - this is referred to as an AGN - Active Galactic Nucleus; extremely far away. ...
... supermassive black holes; radiation is emitted into space as material falls into a black hole, usually at the center of a galaxy - this is referred to as an AGN - Active Galactic Nucleus; extremely far away. ...
AST 207 Test 2 Answers 20 October 2010
... star A. Prof. Adams says he discovered a new type of star that is fainter than white dwarfs. Has he discovered a new type of star? Explain. The clues are very much like Walter Adams’ discovery that Sirius B is a white dwarf. However, there is a crucial missing clue. Since Sirius A and B were known t ...
... star A. Prof. Adams says he discovered a new type of star that is fainter than white dwarfs. Has he discovered a new type of star? Explain. The clues are very much like Walter Adams’ discovery that Sirius B is a white dwarf. However, there is a crucial missing clue. Since Sirius A and B were known t ...
Chapter 7 Review Answers
... at the beginning of the universe (BBT) went. That extra radiation should be present throughout the universe if the BBT was to be true. We believe now that the cosmic background radiation is that extra energy/radiation. The CBR found fits with the predictions consistent with the BBT, supporting the B ...
... at the beginning of the universe (BBT) went. That extra radiation should be present throughout the universe if the BBT was to be true. We believe now that the cosmic background radiation is that extra energy/radiation. The CBR found fits with the predictions consistent with the BBT, supporting the B ...
Section 2
... distance from the earth. temperature is based on the color of the star • Blue or blue white is the hottest and red is the coolest ...
... distance from the earth. temperature is based on the color of the star • Blue or blue white is the hottest and red is the coolest ...
stars and constellations
... the axis will only point at Polaris for a few hundred years, then, another star will be “North”. The ancient Egyptians could not have used Polaris as a compass. Why stars “move” ...
... the axis will only point at Polaris for a few hundred years, then, another star will be “North”. The ancient Egyptians could not have used Polaris as a compass. Why stars “move” ...
Extension worksheet – Topic 6 - Cambridge Resources for the IB
... The diagram shows the variation with time of the combined apparent brightness b of two stars of almost equal radius in a binary star system. b ...
... The diagram shows the variation with time of the combined apparent brightness b of two stars of almost equal radius in a binary star system. b ...
Constellations - Sierra Star Gazers
... Just rising over the northeastern horizon is the constellation Perseus. Between Perseus and Cassiopeia is found one the most interesting objects to be seen through a small to medium aperture scope. The best thing is that it so easy to locate. NGC 869 & 884, popularly known as the Double Cluster, are ...
... Just rising over the northeastern horizon is the constellation Perseus. Between Perseus and Cassiopeia is found one the most interesting objects to be seen through a small to medium aperture scope. The best thing is that it so easy to locate. NGC 869 & 884, popularly known as the Double Cluster, are ...
Serpens
Serpens (""the Serpent"", Greek Ὄφις) is a constellation of the northern hemisphere. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations defined by the International Astronomical Union. It is unique among the modern constellations in being split into two non-contiguous parts, Serpens Caput (Serpent's Head) to the west and Serpens Cauda (Serpent's Tail) to the east. Between these two halves lies the constellation of Ophiuchus, the ""Serpent-Bearer"". In figurative representations, the body of the serpent is represented as passing behind Ophiuchus between Mu Serpentis in Serpens Caput and Nu Serpentis in Serpens Cauda.The brightest star in Serpens is the red giant star Alpha Serpentis, or Unukalhai, in Serpens Caput, with an apparent magnitude of 2.63. Also located in Serpens Caput are the naked-eye globular cluster Messier 5 and the naked-eye variables R Serpentis and Tau4 Serpentis. Notable extragalactic objects include Seyfert's Sextet, one of the densest galaxy clusters known; Arp 220, the prototypical ultraluminous infrared galaxy; and Hoag's Object, the most famous of the very rare class of galaxies known as ring galaxies.Part of the Milky Way's galactic plane passes through Serpens Cauda, which is therefore rich in galactic deep-sky objects, such as the Eagle Nebula (IC 4703) and its associated star cluster Messier 16. The nebula measures 70 light-years by 50 light-years and contains the Pillars of Creation, three dust clouds that became famous for the image taken by the Hubble Space Telescope. Other striking objects include the Red Square Nebula, one of the few objects in astronomy to take on a square shape; and Westerhout 40, a massive nearby star-forming region consisting of a molecular cloud and an H II region.