HR diagram
... located here are about 10 times larger than the Sun, and many time more luminous. Supergiants: A band extending across the top of the HR diagram from blue to red. These are extremely large and luminous stars. White dwarfs: A region in the lower left of the diagram. These are faint, hot, very sma ...
... located here are about 10 times larger than the Sun, and many time more luminous. Supergiants: A band extending across the top of the HR diagram from blue to red. These are extremely large and luminous stars. White dwarfs: A region in the lower left of the diagram. These are faint, hot, very sma ...
PowerPoint Presentation - Research in observational
... • Any change in stellar evolution, can, at least in principle, have different consequences. • For instance: The ignition of the shell results in a higher luminosity (because the shell burns at higher temperature), so why does the star not go up on the HRD instead of right? • Shell generates energy a ...
... • Any change in stellar evolution, can, at least in principle, have different consequences. • For instance: The ignition of the shell results in a higher luminosity (because the shell burns at higher temperature), so why does the star not go up on the HRD instead of right? • Shell generates energy a ...
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 ...
UNIVERSITY OF BRISTOL
... SECTION A contains 5 questions and carries 50% of the marks for the paper. SECTION B contains 3 questions and carries 50% of the marks for the paper. Answer ALL questions from SECTION A and TWO questions from SECTION B. There are 8 questions on this paper. PLEASE NOTE that, where a candidate has att ...
... SECTION A contains 5 questions and carries 50% of the marks for the paper. SECTION B contains 3 questions and carries 50% of the marks for the paper. Answer ALL questions from SECTION A and TWO questions from SECTION B. There are 8 questions on this paper. PLEASE NOTE that, where a candidate has att ...
Measuring Stars` Properties - Test 1 Study Guide
... Lsirius = 23LS means Sirius radiates 23 times more energy than the Sun • Stars range from .0001xLS to 1,000,000xLS Another scale: “magnitude” often used. A log scale to the power of ~2.5. YOU DON’T NEED TO KNOW. The lower the Mag the brighter the object PHYS 162 ...
... Lsirius = 23LS means Sirius radiates 23 times more energy than the Sun • Stars range from .0001xLS to 1,000,000xLS Another scale: “magnitude” often used. A log scale to the power of ~2.5. YOU DON’T NEED TO KNOW. The lower the Mag the brighter the object PHYS 162 ...
QDSpaperFred1.tex
... total cross-sectional area of all the colonies around a solar-type star would be: $2 \pi \times10^{-4} AU^2$, or $1.4 \times 10^{19} m^2$, which is $10^5$ times the land area of Earth. The total bolometric luminosity of stellar radiation intercepted by the colonies and re-radiated ...
... total cross-sectional area of all the colonies around a solar-type star would be: $2 \pi \times10^{-4} AU^2$, or $1.4 \times 10^{19} m^2$, which is $10^5$ times the land area of Earth. The total bolometric luminosity of stellar radiation intercepted by the colonies and re-radiated ...
Ch 3 PPT - Blountstown Middle School
... Life Cycle of a Star (cont.) • A star becomes a main-sequence star as soon as it begins to fuse hydrogen into helium. • Low-mass stars stay on the main sequence for billions of years, and high-mass stars are there for only a few million years. ...
... Life Cycle of a Star (cont.) • A star becomes a main-sequence star as soon as it begins to fuse hydrogen into helium. • Low-mass stars stay on the main sequence for billions of years, and high-mass stars are there for only a few million years. ...
Determining the Sizes of Stars Using the HR Diagram
... ● White Dwarfs: White dwarfs are the end states of stars less than around 6 times the mass of the Sun. The white dwarf is the core of the star that is left after episodes of mass loss causes the star to eject its outer layers, which continue expanding out into space to form a planetary nebulae. For ...
... ● White Dwarfs: White dwarfs are the end states of stars less than around 6 times the mass of the Sun. The white dwarf is the core of the star that is left after episodes of mass loss causes the star to eject its outer layers, which continue expanding out into space to form a planetary nebulae. For ...
Oct 06, 2001
... C) it stops fusing hydrogen in its core and starts to expand. D) it forms planets. ...
... C) it stops fusing hydrogen in its core and starts to expand. D) it forms planets. ...
Spectroscopic parallax
... The relationship between a Cepheid variable's luminosity and variability period is quite precise, and has been used as a standard candle (astronomical object that has a know luminosity) for almost a century. This connection was discovered in 1912 by Henrietta Swan Leavitt. She measured the brightnes ...
... The relationship between a Cepheid variable's luminosity and variability period is quite precise, and has been used as a standard candle (astronomical object that has a know luminosity) for almost a century. This connection was discovered in 1912 by Henrietta Swan Leavitt. She measured the brightnes ...
Your Star: _____________________ Write down the wavelength at which the one
... of some of the well-known stars to calculate, using the formulas and methods discussed in class, their intrinsic properties (temperature, luminosity, and radius.) We will then look for patterns in these properties by way of the H-R (temperature-luminosity) diagram. Your group will be in charge of a ...
... of some of the well-known stars to calculate, using the formulas and methods discussed in class, their intrinsic properties (temperature, luminosity, and radius.) We will then look for patterns in these properties by way of the H-R (temperature-luminosity) diagram. Your group will be in charge of a ...
Right Ascension
... Limits to observations In practice, the Hubble Space Telescope can achieve its diffractionlimited resolution, but the Keck could not, originally. This is because the Keck is on the surface of the Earth, underneath the atmosphere. The atmosphere is in constant motion, and this 'smears' images out a ...
... Limits to observations In practice, the Hubble Space Telescope can achieve its diffractionlimited resolution, but the Keck could not, originally. This is because the Keck is on the surface of the Earth, underneath the atmosphere. The atmosphere is in constant motion, and this 'smears' images out a ...
Binary star formation
... Recall scaling of the Jeans mass: M J µ T 3 2 r -1 2 Initial isothermal phase of collapse (T = constant) is most ...
... Recall scaling of the Jeans mass: M J µ T 3 2 r -1 2 Initial isothermal phase of collapse (T = constant) is most ...
Drawing Constellations
... – Cepheus was the King of Ethiopia. He married Cassiopeia and they had a daughter Andromeda. Cassiopeia was incredibly beautiful but immensely vain. She was also proud of her daughter's beauty. In fact she continually boasted that the two of them were more beautiful than any of the fifty sea nymphs ...
... – Cepheus was the King of Ethiopia. He married Cassiopeia and they had a daughter Andromeda. Cassiopeia was incredibly beautiful but immensely vain. She was also proud of her daughter's beauty. In fact she continually boasted that the two of them were more beautiful than any of the fifty sea nymphs ...
Stars in the night Sky - ScienceEducationatNewPaltz
... Where should I look for a planet or star after its meridian transit? If its altitude on the meridian is high enough, a given constellation may be visible in the early evening sky for two or three months after the date of its midnight culmination. After the date of its midnight culmination it w ...
... Where should I look for a planet or star after its meridian transit? If its altitude on the meridian is high enough, a given constellation may be visible in the early evening sky for two or three months after the date of its midnight culmination. After the date of its midnight culmination it w ...
September Globular Clusters - Salisbury Plain Observing Group
... Pressing onto Lyra now and M56; at only a third of the mass of M13, it is has been described as a good “non comet”. It is fairly easy to find, lying south west of an open chevron shaped asterism. It is around 55 light years across and is 27,000 light years away. Moderate powers used with a 6” start ...
... Pressing onto Lyra now and M56; at only a third of the mass of M13, it is has been described as a good “non comet”. It is fairly easy to find, lying south west of an open chevron shaped asterism. It is around 55 light years across and is 27,000 light years away. Moderate powers used with a 6” start ...
Astronomy Report Southern Cross Authors Maria Constanza Pavez
... beings, which after thousands of years of evolution sought more knowledge using the Universe, its stars and its mysteries. During centuries humanity was looking for an answer to many phenomena that today seem very simple to explain. In Antiquity people used fantastic stories that helped to explain t ...
... beings, which after thousands of years of evolution sought more knowledge using the Universe, its stars and its mysteries. During centuries humanity was looking for an answer to many phenomena that today seem very simple to explain. In Antiquity people used fantastic stories that helped to explain t ...
Observing the Night Sky - Constellations
... The place to begin your study is to look at the sky the way ancient astronomers did, by fitting the stars into patterns that can be used to delineate regions of the sky from one another. The constellation of Pegasus makes a nice square, though a rather poor representation of a winged horse. It takes ...
... The place to begin your study is to look at the sky the way ancient astronomers did, by fitting the stars into patterns that can be used to delineate regions of the sky from one another. The constellation of Pegasus makes a nice square, though a rather poor representation of a winged horse. It takes ...
Lesson 4. Wiens and Stefans Laws
... 1. The peak intensity of thermal radiation from the Sun is at a wavelength of 500 nm, calculate the surface temperature of the Sun. 2. A star has a power output of 6.0 x 1028 W and a surface temperature of 3400K, calculate its radius and the ratio to the Sun’s radius (rsun = 7 x 108 m) ...
... 1. The peak intensity of thermal radiation from the Sun is at a wavelength of 500 nm, calculate the surface temperature of the Sun. 2. A star has a power output of 6.0 x 1028 W and a surface temperature of 3400K, calculate its radius and the ratio to the Sun’s radius (rsun = 7 x 108 m) ...
V = 3 d3 = 4188.8 pc N = ρV = 0.1 pc χ 4188.8 pc = 419
... Adopt the mass-luminosity relationship I showed in class to derive a relationship between the habitable zone distance and primary mass.) a) 0.11 MSun and below b) 0.25 MSun and below c) 0.38 MSun and below d) 0.89 MSun and below For the Sun, the optimistic habitable zone extends out to 1.7 AU. We ca ...
... Adopt the mass-luminosity relationship I showed in class to derive a relationship between the habitable zone distance and primary mass.) a) 0.11 MSun and below b) 0.25 MSun and below c) 0.38 MSun and below d) 0.89 MSun and below For the Sun, the optimistic habitable zone extends out to 1.7 AU. We ca ...
Canis Majoris
... that you could fit about seven quadrillion earths inside of it. To put this into perspective, if earth were the size of a golf ball, Canis Majoris would be the height of Mt. Everest. It is estimated that the diameter of Canis Majoris is 1.7 billion miles. As you can see in the picture on the right, ...
... that you could fit about seven quadrillion earths inside of it. To put this into perspective, if earth were the size of a golf ball, Canis Majoris would be the height of Mt. Everest. It is estimated that the diameter of Canis Majoris is 1.7 billion miles. As you can see in the picture on the right, ...
Boötes
Boötes /boʊˈoʊtiːz/ is a constellation in the northern sky, located between 0° and +60° declination, and 13 and 16 hours of right ascension on the celestial sphere. The name comes from the Greek Βοώτης, Boōtēs, meaning herdsman or plowman (literally, ox-driver; from βοῦς bous “cow”). The ""ö"" in the name is a diaeresis, not an umlaut, meaning that each 'o' is to be pronounced separately.One of the 48 constellations described by the 2nd century astronomer Ptolemy, Boötes is now one of the 88 modern constellations. It contains the fourth brightest star in the night sky, the orange-hued Arcturus. Boötes is home to many other bright stars, including eight above the fourth magnitude and an additional 21 above the fifth magnitude, making a total of 29 stars easily visible to the naked eye.