Notes
... Degenerate carbon-oxygen core, He- and H-burning shells, thin H layer, shrouded in dust from superwind (proto-planetary nebula) Mass loss rate decreases but wind speed increases Hydrogen layer thins further from mass loss and He burning shell Star evolves at constant luminosity (~104LSun), shrinking ...
... Degenerate carbon-oxygen core, He- and H-burning shells, thin H layer, shrouded in dust from superwind (proto-planetary nebula) Mass loss rate decreases but wind speed increases Hydrogen layer thins further from mass loss and He burning shell Star evolves at constant luminosity (~104LSun), shrinking ...
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 ...
Stellar Explosions
... has accumulated too much mass from binary companion If the white dwarf’s mass exceeds 1.4 solar masses, electron degeneracy can no longer keep the core from collapsing. Carbon fusion begins throughout the star almost simultaneously, resulting in a carbon explosion. ...
... has accumulated too much mass from binary companion If the white dwarf’s mass exceeds 1.4 solar masses, electron degeneracy can no longer keep the core from collapsing. Carbon fusion begins throughout the star almost simultaneously, resulting in a carbon explosion. ...
AST 101 INTRODUCTION TO ASTRONOMY SPRING 2008
... B 2. Summer in the southern hemisphere occurs in December, January and February because: A. The Earth is closest to the Sun then. B. The Sun’s light hits that hemisphere most directly then. C. The Earth experiences retrograde motion then. D. The Earth moves more slowly around the Sun then, allowing ...
... B 2. Summer in the southern hemisphere occurs in December, January and February because: A. The Earth is closest to the Sun then. B. The Sun’s light hits that hemisphere most directly then. C. The Earth experiences retrograde motion then. D. The Earth moves more slowly around the Sun then, allowing ...
astr100_finalexam
... Please list, and describe, three major observations that support this theory. [5] Use your textbook and the internet to research the issues involved with human space travel within, and ouside of, the solar system. List some of the issues that make human space travel within the Solar System difficult ...
... Please list, and describe, three major observations that support this theory. [5] Use your textbook and the internet to research the issues involved with human space travel within, and ouside of, the solar system. List some of the issues that make human space travel within the Solar System difficult ...
Celestial Bodies (Mike Stroppa) - Powerpoint
... • Stars come in a variety of colours • Scientists can tell the surface temperature by the colour of the star • Red stars are cooler (Surface T 3000 C) • Blue stars are hotter (Surface T 20000 C) • The Sun is a yellow star (6000 C) ...
... • Stars come in a variety of colours • Scientists can tell the surface temperature by the colour of the star • Red stars are cooler (Surface T 3000 C) • Blue stars are hotter (Surface T 20000 C) • The Sun is a yellow star (6000 C) ...
Deep Space Mystery Note Form 3
... Star). Since 1885 the letter notation has been used, even if there was only one supernova discovered that year (e.g. SN 1885A, 1907A, etc.)—this last happened with SN 1947A. "SN", for SuperNova, is a standard prefix. Until 1987, two-letter designations were rarely needed; since 1988, however, they h ...
... Star). Since 1885 the letter notation has been used, even if there was only one supernova discovered that year (e.g. SN 1885A, 1907A, etc.)—this last happened with SN 1947A. "SN", for SuperNova, is a standard prefix. Until 1987, two-letter designations were rarely needed; since 1988, however, they h ...
E1 Introduction to the universe
... there could be new particles that we do not know about. These are the Weakly Interacting Massive Particles. Many experimenters around the world are searching for these so-called WIMPs. perhaps our current theories of gravity are not completely correct. Some theories try to explain the missing matter ...
... there could be new particles that we do not know about. These are the Weakly Interacting Massive Particles. Many experimenters around the world are searching for these so-called WIMPs. perhaps our current theories of gravity are not completely correct. Some theories try to explain the missing matter ...
The Milky Way
... It's a hundred thousand light years side to side. It bulges in the middle, sixteen thousand light years thick, But out by us, it's just three thousand light years wide. We're thirty thousand light years from galactic central point. We go 'round every two hundred million years, And our galaxy is only ...
... It's a hundred thousand light years side to side. It bulges in the middle, sixteen thousand light years thick, But out by us, it's just three thousand light years wide. We're thirty thousand light years from galactic central point. We go 'round every two hundred million years, And our galaxy is only ...
PHYS 390 Lecture 3
... Luminosities and distances to stars The total energy emitted from the surface of a star per unit time (which is the total power of the star) is referred to as its luminosity L. The luminosity of the Sun, for example, is 3.9 x 1026 J/s (or watts). The amount of energy from the Sun that reaches a part ...
... Luminosities and distances to stars The total energy emitted from the surface of a star per unit time (which is the total power of the star) is referred to as its luminosity L. The luminosity of the Sun, for example, is 3.9 x 1026 J/s (or watts). The amount of energy from the Sun that reaches a part ...
Chapter 5 - AstroStop
... The lightest and simplest elements, hydrogen and helium, are abundant in the universe. Heavier elements, such as iron and silicon, are created by thermonuclear reactions in the interiors of stars, and then ejected into space by those stars. Ejection of Matter from Stars ...
... The lightest and simplest elements, hydrogen and helium, are abundant in the universe. Heavier elements, such as iron and silicon, are created by thermonuclear reactions in the interiors of stars, and then ejected into space by those stars. Ejection of Matter from Stars ...
Monday, April 28
... • Flaws: – Observations made only in visible spectrum – Did not take into account absorption by interstellar gas and dust ...
... • Flaws: – Observations made only in visible spectrum – Did not take into account absorption by interstellar gas and dust ...
Stellar Evolution: the Death of Stars
... • Helium shell contracts and ignites helium flash • Helium flash creates a strong thermal pulse, which ejects a shell of material into space • Thermal pulse through helium flash can occur several times • Eventually, the entire shell of an AGB star is shed away and becomes nebula ...
... • Helium shell contracts and ignites helium flash • Helium flash creates a strong thermal pulse, which ejects a shell of material into space • Thermal pulse through helium flash can occur several times • Eventually, the entire shell of an AGB star is shed away and becomes nebula ...
lecture11
... blackbody radiation. –Hotter objects emit more total radiation per unit surface area. –Hotter objects emit photons with a higher average energy. ...
... blackbody radiation. –Hotter objects emit more total radiation per unit surface area. –Hotter objects emit photons with a higher average energy. ...
Kepler`s Law - New Mexico Tech
... The Sun’s Lifecycle • The Sun was formed about 4.57 billion years ago when a hydrogen molecular cloud collapsed. • It is about halfway through its main-sequence evolution, during this time, nuclear fusion reactions in its core fuse hydrogen into helium. • It will spend approx. 10 billion years as a ...
... The Sun’s Lifecycle • The Sun was formed about 4.57 billion years ago when a hydrogen molecular cloud collapsed. • It is about halfway through its main-sequence evolution, during this time, nuclear fusion reactions in its core fuse hydrogen into helium. • It will spend approx. 10 billion years as a ...
Slide 1
... GRB long durations may provide constraints for the rotation law in the pre-SN star. The minimum accretion rate limit for the neutrino-powered jets, in the Schwarzschild black hole models, results in GRB durations up to 40-100 s. The minimum accretion rate and BH spin limit, for jets powered by both ...
... GRB long durations may provide constraints for the rotation law in the pre-SN star. The minimum accretion rate limit for the neutrino-powered jets, in the Schwarzschild black hole models, results in GRB durations up to 40-100 s. The minimum accretion rate and BH spin limit, for jets powered by both ...
Solar System from Web
... The Sun’s Lifecycle • The Sun was formed about 4.57 billion years ago when a hydrogen molecular cloud collapsed. • It is about halfway through its main-sequence evolution, during this time, nuclear fusion reactions in its core fuse hydrogen into helium. • It will spend approx. 10 billion years as a ...
... The Sun’s Lifecycle • The Sun was formed about 4.57 billion years ago when a hydrogen molecular cloud collapsed. • It is about halfway through its main-sequence evolution, during this time, nuclear fusion reactions in its core fuse hydrogen into helium. • It will spend approx. 10 billion years as a ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.