Lecture Nine (Powerpoint format) - FLASH Center for Computational
... higher mass stars to consume fuel much more rapidly than lower mass stars. In addition, some nuclei only begin to ignite at the higher temperatures accessible to higher-mass stars. ...
... higher mass stars to consume fuel much more rapidly than lower mass stars. In addition, some nuclei only begin to ignite at the higher temperatures accessible to higher-mass stars. ...
AST101_lect_13
... • Stars generate luminosity through fusion of H into He • The lifetime of a star is proportional to the amount of fuel it has (mass) divided by the rate at which it expends the fuel (luminosity) ...
... • Stars generate luminosity through fusion of H into He • The lifetime of a star is proportional to the amount of fuel it has (mass) divided by the rate at which it expends the fuel (luminosity) ...
Powerpoint Presentation (large file)
... thermonuclear reactions • The sequence of thermonuclear reactions stops here, because the formation of elements heavier than iron requires an input of energy rather than causing energy to be released ...
... thermonuclear reactions • The sequence of thermonuclear reactions stops here, because the formation of elements heavier than iron requires an input of energy rather than causing energy to be released ...
Fundamentals - Indiana University
... • Since astronomical sources emit a wide spectrum of radiation, L, S and I are all functions of or , and we need to be more precise and define: • Luminosity density: L() = dL/d W/Hz • Flux density: S() = dS/d W/m2/Hz • Specific intensity: I() = dI/d W/m2/str/Hz • The specific intensity is t ...
... • Since astronomical sources emit a wide spectrum of radiation, L, S and I are all functions of or , and we need to be more precise and define: • Luminosity density: L() = dL/d W/Hz • Flux density: S() = dS/d W/m2/Hz • Specific intensity: I() = dI/d W/m2/str/Hz • The specific intensity is t ...
Two Summers in the UCSC Science Internship Program
... the bright star in the center of this image, is about 20 times more massive than our Sun and is moving toward the left at about 24 kilometers per second. The star’s stellar wind compresses and heats the interstellar medium ahead of it, creating the interstellar bow wave to its left. ...
... the bright star in the center of this image, is about 20 times more massive than our Sun and is moving toward the left at about 24 kilometers per second. The star’s stellar wind compresses and heats the interstellar medium ahead of it, creating the interstellar bow wave to its left. ...
2 Measurements in Astronomy
... Measurements in Astronomy Astronomical unit: distance from Earth to the Sun (about 150,000,000 kilometers, or 93,000,000 miles). Used for measuring distances within our solar system. Light year: the distance light travels in one year (nearly 10 trillion kilometers or 6 trillion miles). Used for ...
... Measurements in Astronomy Astronomical unit: distance from Earth to the Sun (about 150,000,000 kilometers, or 93,000,000 miles). Used for measuring distances within our solar system. Light year: the distance light travels in one year (nearly 10 trillion kilometers or 6 trillion miles). Used for ...
Mathematical Methods in Ancient Astronomy
... astronomy is, of course, identical. Starting from a few empirical elements one wishes to be able to compute the positions of the celestial bodies for any given moment. One may say with equal right that the progress, or the error, of the Greek method consisted in the invention of an intermediate step ...
... astronomy is, of course, identical. Starting from a few empirical elements one wishes to be able to compute the positions of the celestial bodies for any given moment. One may say with equal right that the progress, or the error, of the Greek method consisted in the invention of an intermediate step ...
Lesson Plan - California Academy of Sciences
... Dark room with minimal light pollution 1 copy per student of the assessment probe (optional) Glow-In-The-Dark Ball (optional) ...
... Dark room with minimal light pollution 1 copy per student of the assessment probe (optional) Glow-In-The-Dark Ball (optional) ...
Stars - Moodle
... • After the main sequence, stars with a mass much greater than the sun can burn and create larger and larger elements • When it gets to iron, it takes too much energy to create other elements so it collapses • This causes a ___________________, this is when heavier elements are made ...
... • After the main sequence, stars with a mass much greater than the sun can burn and create larger and larger elements • When it gets to iron, it takes too much energy to create other elements so it collapses • This causes a ___________________, this is when heavier elements are made ...
托福TPO3听力真题文本6 小马过河为大家准备了“托福TPO2听力真题
... reading. Well, here’s what you’d see. I want you to notice that this spectrum is interrupted by dark lines called spectral lines. If you really magnify the spectrum of the sunlight, you could identify more than 100,000 of them. They may look like kind of randomly placed, but they actually form many ...
... reading. Well, here’s what you’d see. I want you to notice that this spectrum is interrupted by dark lines called spectral lines. If you really magnify the spectrum of the sunlight, you could identify more than 100,000 of them. They may look like kind of randomly placed, but they actually form many ...
Stellar Physics 1
... A. A hot dense gas produces a continuous spectrum with no spectral lines. B. A hot diffuse gas produces bright spectral lines – an emission spectrum. C. A cool dense gas produces a continuous spectrum with no spectral lines. y D. A cool diffuse gas in front of a source of continuous spectrum produce ...
... A. A hot dense gas produces a continuous spectrum with no spectral lines. B. A hot diffuse gas produces bright spectral lines – an emission spectrum. C. A cool dense gas produces a continuous spectrum with no spectral lines. y D. A cool diffuse gas in front of a source of continuous spectrum produce ...
Modeling axial tilt and daylight
... You will need a bright lightbulb, and a socket for it (with a switch) that you can put in the middle of a room. Each person will also need a Styrofoam ball, a wooden skewer, a pair of scissors to trim the point from the skewer, and one or two push-pins to represent locations on the Earth. Put the sk ...
... You will need a bright lightbulb, and a socket for it (with a switch) that you can put in the middle of a room. Each person will also need a Styrofoam ball, a wooden skewer, a pair of scissors to trim the point from the skewer, and one or two push-pins to represent locations on the Earth. Put the sk ...
Stars and Nebula
... C. There is no nearby source of ultraviolet light. D. They do emit light but it is immediately absorbed by nearby gas and dust. ...
... C. There is no nearby source of ultraviolet light. D. They do emit light but it is immediately absorbed by nearby gas and dust. ...
The Milky Way - Houston Community College System
... III. The Deaths of Massive Stars A. Nuclear Fusion in Massive Stars B. The Iron Core C. The Supernova Deaths of Massive Stars D. Types of Supernovae E. Observations of Supernovae F. The Great Supernova of 1987 G. Local Supernovae and Life on Earth ...
... III. The Deaths of Massive Stars A. Nuclear Fusion in Massive Stars B. The Iron Core C. The Supernova Deaths of Massive Stars D. Types of Supernovae E. Observations of Supernovae F. The Great Supernova of 1987 G. Local Supernovae and Life on Earth ...
ASTR100 Class 01 - University of Maryland Department of
... The Sun moves randomly relative to other nearby stars, and orbits the galaxy once every 230 million years. ...
... The Sun moves randomly relative to other nearby stars, and orbits the galaxy once every 230 million years. ...
Table of Contents March General Meeting March is Membership
... supernovae fell into different types based on their light curves, that is, their pattern of rising and falling brightness. Later, they found these types actually corresponded to different physical circumstances triggering the explosions. Even those types have fine distinctions based on their spectra ...
... supernovae fell into different types based on their light curves, that is, their pattern of rising and falling brightness. Later, they found these types actually corresponded to different physical circumstances triggering the explosions. Even those types have fine distinctions based on their spectra ...
The (Stellar) Parallax View
... careful calculations and as many as a dozen painstaking observations in a night. Contemporary astronomers were delighted by this result. John Herschel called it “the greatest and most glorious triumph which practical astronomy has ever witnessed”. Astronomers were also staggered by this value, 61 Cy ...
... careful calculations and as many as a dozen painstaking observations in a night. Contemporary astronomers were delighted by this result. John Herschel called it “the greatest and most glorious triumph which practical astronomy has ever witnessed”. Astronomers were also staggered by this value, 61 Cy ...
Linking Asteroids and Meteorites through Reflectance
... • 4 in-class exams and a cumulative final • I will drop the lowest test score • The average of the 4 highest scores will be 80% of your grade • 10% of your grade will be your homework score • 10% of your grade will be from PRS ...
... • 4 in-class exams and a cumulative final • I will drop the lowest test score • The average of the 4 highest scores will be 80% of your grade • 10% of your grade will be your homework score • 10% of your grade will be from PRS ...
PowerPoint - Chandra X
... High resolution observations revealed the existence of soft (kT ~ 0.24 keV) point source of X-rays -presumably a neutron star-- embedded in a nebula of cometary morphology within the supernova remnant. Interpreting the cometary nebula as due to a pulsar wind with a bow shock due to its motion throug ...
... High resolution observations revealed the existence of soft (kT ~ 0.24 keV) point source of X-rays -presumably a neutron star-- embedded in a nebula of cometary morphology within the supernova remnant. Interpreting the cometary nebula as due to a pulsar wind with a bow shock due to its motion throug ...
Outline2a
... better penetrates the interstellar dust, while the shorter wavelength light is scattered away. The protostars are totally obscured in the optical, but can be detected in the infrared. ...
... better penetrates the interstellar dust, while the shorter wavelength light is scattered away. The protostars are totally obscured in the optical, but can be detected in the infrared. ...
Lecture11
... • Stars are born from this gas and dust, collectively known as the interstellar medium. • During their lifetime, stars may return some material to the ISM through surface winds or explosive events • In supernova explosions, most of the star is dispersed throughout the ISM. ...
... • Stars are born from this gas and dust, collectively known as the interstellar medium. • During their lifetime, stars may return some material to the ISM through surface winds or explosive events • In supernova explosions, most of the star is dispersed throughout the ISM. ...
Chapter 21
... • Stars differ in size, density, mass, composition, and color • The color of a star is determined by it surface temperature (ESRT’s P. 15 top) – The hotter the star, the bluer the color. The cooler the star, the redder the color. (yeah, yeah, I know, it’s ...
... • Stars differ in size, density, mass, composition, and color • The color of a star is determined by it surface temperature (ESRT’s P. 15 top) – The hotter the star, the bluer the color. The cooler the star, the redder the color. (yeah, yeah, I know, it’s ...