insert - Athens
... medium-sized star like our sun could hold more than a million earths inside it! Other stars such as supergiants may be thousands of times larger than our sun. But the enormous distance between them and our earth makes tham appear tiny in the night sky. So what makes a star shine? Hot gases under eno ...
... medium-sized star like our sun could hold more than a million earths inside it! Other stars such as supergiants may be thousands of times larger than our sun. But the enormous distance between them and our earth makes tham appear tiny in the night sky. So what makes a star shine? Hot gases under eno ...
Supernovae
... massive B star (20 M) • Neutrinos are rarely absorbed so energy changed little over many x 10 9 years (except for loss due to expansion of Universe)… thus they are very difficult to detect. • However density of collapsing SN core is so high that it impedes even neutrinos!!! ...
... massive B star (20 M) • Neutrinos are rarely absorbed so energy changed little over many x 10 9 years (except for loss due to expansion of Universe)… thus they are very difficult to detect. • However density of collapsing SN core is so high that it impedes even neutrinos!!! ...
Life Cycle of Stars
... temperature of a star determines its color – from cool, red stars to hot, blue ones. The Sun is a medium temperature yellow star. Around 1910, astronomers Ejnar Hertzsprung and Henry Russell independently developed what is now known as the Hertzsprung-Russell or H-R diagram. This graph plots the rel ...
... temperature of a star determines its color – from cool, red stars to hot, blue ones. The Sun is a medium temperature yellow star. Around 1910, astronomers Ejnar Hertzsprung and Henry Russell independently developed what is now known as the Hertzsprung-Russell or H-R diagram. This graph plots the rel ...
Advantages and Disadvantages
... •Excellent for faint deep sky objects such as remote galaxies, nebulae and star clusters due to the generally fast focal ratios (f/4 to f/8), yet also reasonably good for lunar and planetary work ...
... •Excellent for faint deep sky objects such as remote galaxies, nebulae and star clusters due to the generally fast focal ratios (f/4 to f/8), yet also reasonably good for lunar and planetary work ...
To understand the deaths of stars and how it depends on
... 1) To learn about the lives of Red dwarfs 2) To understand what Stars like the sun will do at the end of their lifetimes 3) To understand how Stars somewhat bigger than the sun will have different ends 4) To understand how and why Stars quite a bit bigger than the sun will end their lives 5) To exam ...
... 1) To learn about the lives of Red dwarfs 2) To understand what Stars like the sun will do at the end of their lifetimes 3) To understand how Stars somewhat bigger than the sun will have different ends 4) To understand how and why Stars quite a bit bigger than the sun will end their lives 5) To exam ...
Introducing the Stars
... Perhaps it is a typical star, like many others - just particularly nearby, hence extraordinarily bright in appearance. Or perhaps it is fundamentally different from the stars – ...
... Perhaps it is a typical star, like many others - just particularly nearby, hence extraordinarily bright in appearance. Or perhaps it is fundamentally different from the stars – ...
GOFER Module: Google Sky Please open Google Earth, then
... Begin to zoom in. What indirectly indicates we are gazing towards our galaxy’s center? A. There are many more stars, nebulas, and star clusters here than in other directions. B. Sagittarius and Scorpius are the largest constellations on the sky. C. This portion of sky contains the neighboring Androm ...
... Begin to zoom in. What indirectly indicates we are gazing towards our galaxy’s center? A. There are many more stars, nebulas, and star clusters here than in other directions. B. Sagittarius and Scorpius are the largest constellations on the sky. C. This portion of sky contains the neighboring Androm ...
Poster - Arkansas Center for Space and Planetary Sciences
... other nearly edge-on from an observer’s viewpoint, the object’s variability results from the stars eclipsing each other and blocking some of the light. GX Gem belongs to a category of binary stars called close binaries since the two stars cannot be individually resolved in a telescope. By studying t ...
... other nearly edge-on from an observer’s viewpoint, the object’s variability results from the stars eclipsing each other and blocking some of the light. GX Gem belongs to a category of binary stars called close binaries since the two stars cannot be individually resolved in a telescope. By studying t ...
Lecture 26 Pre-Main Sequence Evolution
... Star formation can be described in terms of four stages ...
... Star formation can be described in terms of four stages ...
Unique observations of a newborn star provide information on the
... the discovery of a new star is an extremely rare event, having occurred only twice in the last century. What made this star even more special was the fact that it appears to be an extremely young star – far less than a million years old – about the same mass as the sun. Astronomers know of fewer Dav ...
... the discovery of a new star is an extremely rare event, having occurred only twice in the last century. What made this star even more special was the fact that it appears to be an extremely young star – far less than a million years old – about the same mass as the sun. Astronomers know of fewer Dav ...
File
... spread out in an immense volume. All stars begin their lives as parts of nebulas. ______________ can pull some of the gas and dust in a nebula together. The contracting cloud is then called a _________________________. Proto means _______________ stage of a star’s life. A star is born when ...
... spread out in an immense volume. All stars begin their lives as parts of nebulas. ______________ can pull some of the gas and dust in a nebula together. The contracting cloud is then called a _________________________. Proto means _______________ stage of a star’s life. A star is born when ...
DOC
... The existence of planetary systems beyond our own has been repeatedly confirmed over the past decade. In fact, over 200 planets have already been discovered orbiting stars other than the Sun. The great majority of these planets are giant gas planets, similar to Jupiter in our solar system, many of t ...
... The existence of planetary systems beyond our own has been repeatedly confirmed over the past decade. In fact, over 200 planets have already been discovered orbiting stars other than the Sun. The great majority of these planets are giant gas planets, similar to Jupiter in our solar system, many of t ...
DUST FROM EVOLVED STARS TO PROTOSTARS. A. K. Speck
... molecules [e.g. 5]. Furthermore, dust has been observed at higher redshifts than expected, and understanding this phenomenon is vital to our understanding of the cosmos at large and its evolution [e.g. 6, 7].Such a crucial and ubiquitous constituent of our Universe needs to be well understood in its ...
... molecules [e.g. 5]. Furthermore, dust has been observed at higher redshifts than expected, and understanding this phenomenon is vital to our understanding of the cosmos at large and its evolution [e.g. 6, 7].Such a crucial and ubiquitous constituent of our Universe needs to be well understood in its ...
Bluffer`s Guide to Orion
... sky. Sirius is the prominent star in the lower left, and part of Taurus can be seen at upper right. Diagram created with Starry Night software. years away and thirty light years across, and is the closest region of star formation to Earth. A lot of what proper astronomers know about how stars and pl ...
... sky. Sirius is the prominent star in the lower left, and part of Taurus can be seen at upper right. Diagram created with Starry Night software. years away and thirty light years across, and is the closest region of star formation to Earth. A lot of what proper astronomers know about how stars and pl ...
Star Light, Star Bright
... without the use of a telescope, but you can only see a fraction of them from any particular viewing point at any particular time. With the help of a powerful telescope, it's possible to see more than 3 billion of the hundreds of billions of stars in our Milky Way Galaxy. ...
... without the use of a telescope, but you can only see a fraction of them from any particular viewing point at any particular time. With the help of a powerful telescope, it's possible to see more than 3 billion of the hundreds of billions of stars in our Milky Way Galaxy. ...
transcript
... survive closer to the hotter regions, but lighter material like hydrogen and helium can’t survive 03:56 so close to the star. They get evaporated or pushed away. So gaseous planets, gas will be formed further away. So in terms of supporting life we know that gaseous planets cannot support life. Ther ...
... survive closer to the hotter regions, but lighter material like hydrogen and helium can’t survive 03:56 so close to the star. They get evaporated or pushed away. So gaseous planets, gas will be formed further away. So in terms of supporting life we know that gaseous planets cannot support life. Ther ...
March 2011
... from Earth at the beginning of March. Earth rotates anticlockwise therefore objects will appear over the eastern horizon in the morning in sequence starting from Venus. They will disappear over the western horizon in the evening in sequence starting with the Sun and followed by Mercury. MERCURY sets ...
... from Earth at the beginning of March. Earth rotates anticlockwise therefore objects will appear over the eastern horizon in the morning in sequence starting from Venus. They will disappear over the western horizon in the evening in sequence starting with the Sun and followed by Mercury. MERCURY sets ...
Death - Wayne State University Physics and Astronomy
... • They are now known to be caused by old, dead stars • The spectra of a nova shows blue-shifted absorption lines showing that a hot dense gas is expanding towards us at a few thousands of kilometers per second • The continuum is from the hot dense gas and the absorption lines are from the lowerdensi ...
... • They are now known to be caused by old, dead stars • The spectra of a nova shows blue-shifted absorption lines showing that a hot dense gas is expanding towards us at a few thousands of kilometers per second • The continuum is from the hot dense gas and the absorption lines are from the lowerdensi ...
Narrated by Whoopi Goldberg - American Museum of Natural History
... A Digital Map of Modern Astrophyics A complex merger of cutting-edge astrophysics research from more than 40 leading scientists around the world and state-of-the-art supercomputing expertise made it possible for Journey to the Stars to transport audiences through time and space. The show’s productio ...
... A Digital Map of Modern Astrophyics A complex merger of cutting-edge astrophysics research from more than 40 leading scientists around the world and state-of-the-art supercomputing expertise made it possible for Journey to the Stars to transport audiences through time and space. The show’s productio ...
White dwarfs - University of Toronto
... If the mass of the collapsed stellar core exceed the limit for what can be held up by neutron degeneracy pressure, the material collapses further. There is not other thing known in physics at the present time to prevent it from forming a black hole. Black holes are characterized by a distance from ...
... If the mass of the collapsed stellar core exceed the limit for what can be held up by neutron degeneracy pressure, the material collapses further. There is not other thing known in physics at the present time to prevent it from forming a black hole. Black holes are characterized by a distance from ...
Chapter 18 - Stars - University of New Mexico
... • Disk: young and old stars, gas and dust, ongoing star formation. Stars have relatively high “metal” content because most formed out of ISM “enriched” by fusion in previous generations of stars. “Population I” stars. This is where most stars are (~1-4 x 1011). • Halo: oldest stars (13 Gyr or so). ...
... • Disk: young and old stars, gas and dust, ongoing star formation. Stars have relatively high “metal” content because most formed out of ISM “enriched” by fusion in previous generations of stars. “Population I” stars. This is where most stars are (~1-4 x 1011). • Halo: oldest stars (13 Gyr or so). ...
Astro-figer
... During this year, the astronomers involved with the Massive Star research project have proposed and won observation time targeting young stellar clusters throughout the Galaxy. The Milky Way study project group meets on a weekly basis to plan and discuss their scientific research. The goals of the p ...
... During this year, the astronomers involved with the Massive Star research project have proposed and won observation time targeting young stellar clusters throughout the Galaxy. The Milky Way study project group meets on a weekly basis to plan and discuss their scientific research. The goals of the p ...
PH607 – Galaxies 1
... Components: Almost 90% of its mass cannot be accounted for (the "dark matter" problem). The Local Group: It then goes on to consider how the Milky Way fits in with what we see in other galaxies, and what the morphologies of these systems tell us about their life histories. Evolution: Galaxies are no ...
... Components: Almost 90% of its mass cannot be accounted for (the "dark matter" problem). The Local Group: It then goes on to consider how the Milky Way fits in with what we see in other galaxies, and what the morphologies of these systems tell us about their life histories. Evolution: Galaxies are no ...
Universe 8e Lecture Chapter 8 Origin of Our Solar System
... planets formed directly from the gases of the solar nebula. In this model the cores formed from planetesimals falling into the planets. The Sun formed by gravitational contraction of the center of the nebula. After about 108 years, temperatures at the protosun’s center became high enough to ignite n ...
... planets formed directly from the gases of the solar nebula. In this model the cores formed from planetesimals falling into the planets. The Sun formed by gravitational contraction of the center of the nebula. After about 108 years, temperatures at the protosun’s center became high enough to ignite n ...
ASTRONOMY 120: GALAXIES AND THE UNIVERSE HOMEWORK
... Calculate the following for a main sequence star with T=10,000K, R=2.0R(sun), M=3.0M(sun). Assume that the proton-proton chain is the only nuclear reaction. Assume that 74% of the original mass of the star is in the form of Hydrogen, 25% in the form of Helium, and 1% in heavier elements. Assume that ...
... Calculate the following for a main sequence star with T=10,000K, R=2.0R(sun), M=3.0M(sun). Assume that the proton-proton chain is the only nuclear reaction. Assume that 74% of the original mass of the star is in the form of Hydrogen, 25% in the form of Helium, and 1% in heavier elements. Assume that ...
Planetary nebula
A planetary nebula, often abbreviated as PN or plural PNe, is a kind of emission nebula consisting of an expanding glowing shell of ionized gas ejected from old red giant stars late in their lives. The word ""nebula"" is Latin for mist or cloud and the term ""planetary nebula"" is a misnomer that originated in the 1780s with astronomer William Herschel because when viewed through his telescope, these objects appeared to him to resemble the rounded shapes of planets. Herschel's name for these objects was popularly adopted and has not been changed. They are a relatively short-lived phenomenon, lasting a few tens of thousands of years, compared to a typical stellar lifetime of several billion years.A mechanism for formation of most planetary nebulae is thought to be the following: at the end of the star's life, during the red giant phase, the outer layers of the star are expelled by strong stellar winds. Eventually, after most of the red giant's atmosphere is dissipated, the exposed hot, luminous core emits ultraviolet radiation to ionize the ejected outer layers of the star. Absorbed ultraviolet light energises the shell of nebulous gas around the central star, appearing as a bright coloured planetary nebula at several discrete visible wavelengths.Planetary nebulae may play a crucial role in the chemical evolution of the Milky Way, returning material to the interstellar medium from stars where elements, the products of nucleosynthesis (such as carbon, nitrogen, oxygen and neon), have been created. Planetary nebulae are also observed in more distant galaxies, yielding useful information about their chemical abundances.In recent years, Hubble Space Telescope images have revealed many planetary nebulae to have extremely complex and varied morphologies. About one-fifth are roughly spherical, but the majority are not spherically symmetric. The mechanisms which produce such a wide variety of shapes and features are not yet well understood, but binary central stars, stellar winds and magnetic fields may play a role.