Lecture 33: The Lives of Stars Astronomy 141
... This lecture concerns the life cycle of normal stars. Stars shine because they are hot, and need a source of energy to keep shining. Main Sequence stars are powered by the fusion of Hydrogen into Helium in their cores The more massive a star is, the shorter its lifetime. Low-Mass stars are long-live ...
... This lecture concerns the life cycle of normal stars. Stars shine because they are hot, and need a source of energy to keep shining. Main Sequence stars are powered by the fusion of Hydrogen into Helium in their cores The more massive a star is, the shorter its lifetime. Low-Mass stars are long-live ...
C H A P T E R 2
... Ancient astronomers devised a “class” system of stars. The brightest stars were placed in the first class, magnitude 1, the next brightest stars were placed in the second class, magnitude 2, and so on. Consequently, bright stars have small numerical magnitude values, while faint stars have very larg ...
... Ancient astronomers devised a “class” system of stars. The brightest stars were placed in the first class, magnitude 1, the next brightest stars were placed in the second class, magnitude 2, and so on. Consequently, bright stars have small numerical magnitude values, while faint stars have very larg ...
FREE Sample Here
... Ancient astronomers devised a “class” system of stars. The brightest stars were placed in the first class, magnitude 1, the next brightest stars were placed in the second class, magnitude 2, and so on. Consequently, bright stars have small numerical magnitude values, while faint stars have very larg ...
... Ancient astronomers devised a “class” system of stars. The brightest stars were placed in the first class, magnitude 1, the next brightest stars were placed in the second class, magnitude 2, and so on. Consequently, bright stars have small numerical magnitude values, while faint stars have very larg ...
Final 2004
... the Sun is powered by the thermonu lear fusion of 3 4 He nu lei to 12 C in its ore d the speed of the Earth orbiting the Sun does not depend on the Sun's mass (18.) Whi h of the following pro esses is most likely to be seen in Nature? a p+p ...
... the Sun is powered by the thermonu lear fusion of 3 4 He nu lei to 12 C in its ore d the speed of the Earth orbiting the Sun does not depend on the Sun's mass (18.) Whi h of the following pro esses is most likely to be seen in Nature? a p+p ...
space tech - Project Jugaad
... your two eyes are separated by a few inches, each views your thumb from a different position. The amount that your thumb appears to move is its parallax. When astronomers measure the parallax of an object and know the separation between the two positions from which it is observed, they can calculate ...
... your two eyes are separated by a few inches, each views your thumb from a different position. The amount that your thumb appears to move is its parallax. When astronomers measure the parallax of an object and know the separation between the two positions from which it is observed, they can calculate ...
Lecture 13, PPT version
... • Gas is primarily H2 molecules, but you can’t detect them directly! (Note: Helium does not form molecules because it is ...
... • Gas is primarily H2 molecules, but you can’t detect them directly! (Note: Helium does not form molecules because it is ...
The Hertzsprung-Russell Diagram
... 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 ...
... 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 ...
Astro 001 Spring 2002
... A. moons of Jupiter. B. phases of Venus. C. sunspots. D. stellar parallax. E. mountains on the Moon. (29) Which of the following planets can be seen (from Earth) in a crescent phase? A. Mercury B. Venus C. Mars D. [Two of the above.] E. [All of the above.] (30) Which of the following observations by ...
... A. moons of Jupiter. B. phases of Venus. C. sunspots. D. stellar parallax. E. mountains on the Moon. (29) Which of the following planets can be seen (from Earth) in a crescent phase? A. Mercury B. Venus C. Mars D. [Two of the above.] E. [All of the above.] (30) Which of the following observations by ...
In the Spring of 2007 two of us began planning a new course in
... d. mass e. chemical makeup 15. Current evidence about how the universe is changing tells us that a. We are near the center of the universe. b. Galaxies are expanding into empty space. c. Groups of galaxies appear to move away from each other d. Nearby galaxies are younger than distant galaxies. 16. ...
... d. mass e. chemical makeup 15. Current evidence about how the universe is changing tells us that a. We are near the center of the universe. b. Galaxies are expanding into empty space. c. Groups of galaxies appear to move away from each other d. Nearby galaxies are younger than distant galaxies. 16. ...
PH709-10-asn1ans
... The planet mass can be loosely constrained: The relevant time scale is called the Einstein time and it's given by the time it takes the lens (moving at speed v) to traverse an Einstein radius. ...
... The planet mass can be loosely constrained: The relevant time scale is called the Einstein time and it's given by the time it takes the lens (moving at speed v) to traverse an Einstein radius. ...
Celestial Mechanics
... Kepler traced out the orbits of the planets, and combined with temporal information, arrived at three empirical laws of motion. ...
... Kepler traced out the orbits of the planets, and combined with temporal information, arrived at three empirical laws of motion. ...
Evolution of our Sun
... Explain why a massive star only lives a short time? What elements are created in a sun-like star? What elements are created in a massive star? Evolution of the Sun – Part 2 Name and briefly describe the stages that our sun will go through as it ages. About how long does our sun live as a main sequen ...
... Explain why a massive star only lives a short time? What elements are created in a sun-like star? What elements are created in a massive star? Evolution of the Sun – Part 2 Name and briefly describe the stages that our sun will go through as it ages. About how long does our sun live as a main sequen ...
Inverse Square Law, Blackbody Radiation y
... The luminosity of the Sun is 3.86×1026 watts. As light travels away from a spherical source, its energy spreads out over the surfaces of spheres of increasing radius as shown in the figure. How bright the light appears to a detector (such as the eye or a photometer) depends on how fast the radiant e ...
... The luminosity of the Sun is 3.86×1026 watts. As light travels away from a spherical source, its energy spreads out over the surfaces of spheres of increasing radius as shown in the figure. How bright the light appears to a detector (such as the eye or a photometer) depends on how fast the radiant e ...
Stan Woosley (UCSC)
... • Lightest neutron star 1.16 solar masses; average 1.4 solar masses. Black holes a likely product for some current generation stars in the 30 – 50 solar mass range (more black holes at metallicities lower than the sun) ...
... • Lightest neutron star 1.16 solar masses; average 1.4 solar masses. Black holes a likely product for some current generation stars in the 30 – 50 solar mass range (more black holes at metallicities lower than the sun) ...
Slide 1
... • Astronomers think that most of the stars in the Milky Way galaxy could also have planets orbiting around them. These are called “extra-solar planets”. ...
... • Astronomers think that most of the stars in the Milky Way galaxy could also have planets orbiting around them. These are called “extra-solar planets”. ...
etlife - University of Glasgow
... The Kepler mission (launch 2007?) will detect transits of Earth-type planets, by observing the brightness dip of stars (already done in 2000 with Keck for a 0.5 x Jupiter-mass planet) There was a (rare) transit of Mercury on May 7th 2003, and a (very rare) transit of Venus on June 8th 2004 ...
... The Kepler mission (launch 2007?) will detect transits of Earth-type planets, by observing the brightness dip of stars (already done in 2000 with Keck for a 0.5 x Jupiter-mass planet) There was a (rare) transit of Mercury on May 7th 2003, and a (very rare) transit of Venus on June 8th 2004 ...
White Dwarfs
... a. These stars are fusing hydrogen at their surface. b. These stars have at least two active layers of fusion. c. These stars have multiple concentric layers of active fusion. d. We cannot see the interior stars that are below this temperature, as they are too dim. e. Planetary nebulae glow due to t ...
... a. These stars are fusing hydrogen at their surface. b. These stars have at least two active layers of fusion. c. These stars have multiple concentric layers of active fusion. d. We cannot see the interior stars that are below this temperature, as they are too dim. e. Planetary nebulae glow due to t ...
A Story about a Star`s Life
... • A star’s apparent magnitude depends on the star’s luminosity and distance – a star may appear dim because it is very far away or it does not emit much energy ...
... • A star’s apparent magnitude depends on the star’s luminosity and distance – a star may appear dim because it is very far away or it does not emit much energy ...
EXOPLANETS The search for planets beyond our solar system
... The first exoplanets were discovered through the gravitational tug they exert on their parent stars, which causes the stars to wobble. This motion is revealed in the spectrum of a star’s emitted light. Elements present in the star absorb particular wavelengths of light to produce a characteristic se ...
... The first exoplanets were discovered through the gravitational tug they exert on their parent stars, which causes the stars to wobble. This motion is revealed in the spectrum of a star’s emitted light. Elements present in the star absorb particular wavelengths of light to produce a characteristic se ...
Aquarius (constellation)
Aquarius is a constellation of the zodiac, situated between Capricornus and Pisces. Its name is Latin for ""water-carrier"" or ""cup-carrier"", and its symbol is 20px (Unicode ♒), a representation of water.Aquarius is one of the oldest of the recognized constellations along the zodiac (the sun's apparent path). It was one of the 48 constellations listed by the 2nd century AD astronomer Ptolemy, and it remains one of the 88 modern constellations. It is found in a region often called the Sea due to its profusion of constellations with watery associations such as Cetus the whale, Pisces the fish, and Eridanus the river.