1 - Uplift North Hills Prep
... M10/4/PHYSI/SP3/ENG/TZ2/XX Option E — Astrophysics E1. This question is about the relative population density of stars and galaxies. The number of stars around the Sun, within a distance of 17 ly, is 75. The number of galaxies in the local group, within a distance of 4.0 x 106 ly from the Sun, is 2 ...
... M10/4/PHYSI/SP3/ENG/TZ2/XX Option E — Astrophysics E1. This question is about the relative population density of stars and galaxies. The number of stars around the Sun, within a distance of 17 ly, is 75. The number of galaxies in the local group, within a distance of 4.0 x 106 ly from the Sun, is 2 ...
How Stars Form Powerpoint
... Main Sequence! Once they reach it, they are in equilibrium and do not move until their fuel begins to run out. ...
... Main Sequence! Once they reach it, they are in equilibrium and do not move until their fuel begins to run out. ...
Sequencing the Stars
... Globular clusters are known to be very old—roughly as old as our galaxy itself. In fact, all of the stars in a globular cluster formed at about the same time billions of years ago. There are no remaining bright, hot, blue stars in globular clusters. They have all lived, loved, and died billions of y ...
... Globular clusters are known to be very old—roughly as old as our galaxy itself. In fact, all of the stars in a globular cluster formed at about the same time billions of years ago. There are no remaining bright, hot, blue stars in globular clusters. They have all lived, loved, and died billions of y ...
Death of massive stars
... a massive star. They die away more sharply than the Type I (about 15 days), but then their magnitude plateaus until about 100 days past their explosion. They form from Population I stars in spiral galaxies. ...
... a massive star. They die away more sharply than the Type I (about 15 days), but then their magnitude plateaus until about 100 days past their explosion. They form from Population I stars in spiral galaxies. ...
What is a Star?
... Our Sun • Apparent magnitude of our sun is 26.4, because it is so close. – If it were further from us, it would look much dimmer. ...
... Our Sun • Apparent magnitude of our sun is 26.4, because it is so close. – If it were further from us, it would look much dimmer. ...
Evolution Cycle of Stars
... temperature of a white dwarf is 8000C or more, but being smaller than the Sun their overall luminosity's are 1% of the Sun or less. • White dwarfs are the shrunken remains of normal stars, whose nuclear energy supplies have been used up. White dwarf consist of degenerate matter with a very high dens ...
... temperature of a white dwarf is 8000C or more, but being smaller than the Sun their overall luminosity's are 1% of the Sun or less. • White dwarfs are the shrunken remains of normal stars, whose nuclear energy supplies have been used up. White dwarf consist of degenerate matter with a very high dens ...
Document
... • That was a mistake because the room was locked but unguarded; this was a perfect opportunity for the gods to discuss their plan against Mt. Olympus. “We need to come up with a plan,” Hephaestus said grimly. • “We need revenge on Mt.Olympus” Hades said, his gray, dark eyes signing no emotion. • The ...
... • That was a mistake because the room was locked but unguarded; this was a perfect opportunity for the gods to discuss their plan against Mt. Olympus. “We need to come up with a plan,” Hephaestus said grimly. • “We need revenge on Mt.Olympus” Hades said, his gray, dark eyes signing no emotion. • The ...
Phys133-Sample MT2
... A) They were produced in the Big Bang. B) They were produced inside stars. C) They evolved from hydrogen and helium shortly after the Big Bang. D) They were produced inside dense interstellar gas. E) all of the above ...
... A) They were produced in the Big Bang. B) They were produced inside stars. C) They evolved from hydrogen and helium shortly after the Big Bang. D) They were produced inside dense interstellar gas. E) all of the above ...
Mass and composition determine most of the properties of a star
... across the street, which light would appear brighter? You cannot tell by looking in the sky how bright a star truly is. The farther away the star is, the less bright it will appear. ...
... across the street, which light would appear brighter? You cannot tell by looking in the sky how bright a star truly is. The farther away the star is, the less bright it will appear. ...
StarCharacteristics
... across the street, which light would appear brighter? You cannot tell by looking in the sky how bright a star truly is. The farther away the star is, the less bright it will appear. ...
... across the street, which light would appear brighter? You cannot tell by looking in the sky how bright a star truly is. The farther away the star is, the less bright it will appear. ...
The Hertzsprung-Russell Diagram
... 9. Label the following steps on your H-R diagram to show the series of changes that our sun has undergone since its formation 4.6 billion years ago. a. Originally, a big cloud of gas and dust called a nebula condensed to form a young, cool star called a red dwarf. In this first stage of life, our s ...
... 9. Label the following steps on your H-R diagram to show the series of changes that our sun has undergone since its formation 4.6 billion years ago. a. Originally, a big cloud of gas and dust called a nebula condensed to form a young, cool star called a red dwarf. In this first stage of life, our s ...
types of stars, luminosity, and brightness
... 13. You would NOT expect the same distribution of stars on the HR diagram if Apparent Brightness versus Temperature were plotted, because apparent brightness depends on the distance to each star, and every star is located at a different distance from us. So, some stars APPEAR dimmer, even though th ...
... 13. You would NOT expect the same distribution of stars on the HR diagram if Apparent Brightness versus Temperature were plotted, because apparent brightness depends on the distance to each star, and every star is located at a different distance from us. So, some stars APPEAR dimmer, even though th ...
Measuring Stars
... •Observe the star – determine it’s brightness B •Measure its spectral type from spectrum •Deduce its luminosity from the HertzsprungRussell Diagram •Find its distance from: L = 4d2B ...
... •Observe the star – determine it’s brightness B •Measure its spectral type from spectrum •Deduce its luminosity from the HertzsprungRussell Diagram •Find its distance from: L = 4d2B ...
The colour-magnitude diagram
... Different effective temperatures correspond to: • different spectral types • different colours ...
... Different effective temperatures correspond to: • different spectral types • different colours ...
d = 1 / p
... 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 this in practice, first find the energy per second emitted by each unit of surface area, ε, using the relation given in ...
... 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 this in practice, first find the energy per second emitted by each unit of surface area, ε, using the relation given in ...
d = 1 / p
... A quick glance at the night sky will tell you that different stars have different brightnesses. But how much of that effect is due to the fact that some stars are further away, and how much is due to certain stars being intrinsically brighter? If we know the distances from parallax, we can remove th ...
... A quick glance at the night sky will tell you that different stars have different brightnesses. But how much of that effect is due to the fact that some stars are further away, and how much is due to certain stars being intrinsically brighter? If we know the distances from parallax, we can remove th ...
Chapter 15 Test Study Sheet
... a. Students know galaxies are clusters of billions of stars and may have different shapes. Know how scientists can detect the presence of a planet around a distant star. Know that there are three basic galaxy shapes. Know that there are billions of galaxies with billions of stars. Know that ...
... a. Students know galaxies are clusters of billions of stars and may have different shapes. Know how scientists can detect the presence of a planet around a distant star. Know that there are three basic galaxy shapes. Know that there are billions of galaxies with billions of stars. Know that ...
Star Powerpoint notes
... The intensity of light emitted by three hypothetical stars is plotted against wavelength. The range of visible wavelengths is indicated. Where the peak of a star’s intensity curve lies relative to the visible light band determines the apparent color of its visible light. ...
... The intensity of light emitted by three hypothetical stars is plotted against wavelength. The range of visible wavelengths is indicated. Where the peak of a star’s intensity curve lies relative to the visible light band determines the apparent color of its visible light. ...
Distance measures - ScienceEducationatNewPaltz
... be made for atmospheric refraction and the effects of "seeing". Also stars actually do appear to move across the sky relative to other stars in a definite direction over time. This is called proper motion and must be accounted for when determining parallaxes. If you study the parallax diagram you wi ...
... be made for atmospheric refraction and the effects of "seeing". Also stars actually do appear to move across the sky relative to other stars in a definite direction over time. This is called proper motion and must be accounted for when determining parallaxes. If you study the parallax diagram you wi ...
Part 1
... (B) No light can escape, so it looks dark. (C) It is really brown, and the name has nothing to do with color. (D) It emits in all colors, and the mixture has the black color. (E) A black hole is actually white. 28. What did Carl Sagan mean when he said that we are all “star stuff”? (A) that life wou ...
... (B) No light can escape, so it looks dark. (C) It is really brown, and the name has nothing to do with color. (D) It emits in all colors, and the mixture has the black color. (E) A black hole is actually white. 28. What did Carl Sagan mean when he said that we are all “star stuff”? (A) that life wou ...
Astronomy Assignment #1
... 12. Star C and star D are at the same distance from us, but star D is 10,000 times more luminous than star C. How do their brightness levels compare? Star D will appear brighter by a factor of 10,000 over star C. 13. How do the magnitudes of stars C and D in problem 4 compare? (Problem 4 synopsis: ...
... 12. Star C and star D are at the same distance from us, but star D is 10,000 times more luminous than star C. How do their brightness levels compare? Star D will appear brighter by a factor of 10,000 over star C. 13. How do the magnitudes of stars C and D in problem 4 compare? (Problem 4 synopsis: ...
galaxy_physics
... Disks are rotationally supported (dynamically cold) Bulges are dispersion supported (dynamically hot) Two extremes along a continuum Rotation asymmetric drift dispersion ...
... Disks are rotationally supported (dynamically cold) Bulges are dispersion supported (dynamically hot) Two extremes along a continuum Rotation asymmetric drift dispersion ...
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.