Stellar Evolution Hertzsprung-Russell Diagram Hertzsprung
... some go through nova/supernova stage most become black dwarfs and disappear ...
... some go through nova/supernova stage most become black dwarfs and disappear ...
ref H-R Spectral types
... Betelgeuse is one of the best-known red giant stars. If Betelgeuse were to swallow the solar system, it would do so out as far as Jupiter! This terrific photo was taken by the Hubble Space Telescope. ...
... Betelgeuse is one of the best-known red giant stars. If Betelgeuse were to swallow the solar system, it would do so out as far as Jupiter! This terrific photo was taken by the Hubble Space Telescope. ...
Stellar evolution
... Evolution of Stars > 8 MSun Higher mass stars evolve more rapidly and fuse heavier elements. Example: 20 MSun star lives "only" ~107 years. Result is "onion" structure with many shells of fusionproduced elements. Heaviest element made is iron. ...
... Evolution of Stars > 8 MSun Higher mass stars evolve more rapidly and fuse heavier elements. Example: 20 MSun star lives "only" ~107 years. Result is "onion" structure with many shells of fusionproduced elements. Heaviest element made is iron. ...
read in advance to speed your work
... seen when we look in the direction of the constellation of Orion. Begin making an H-R diagram for the stars in Orion (Table II). Plot the MV values (MV again is simply absolute magnitude, M, with the subscript indicating that the magnitude is measured in the visual part of the spectrum) against the ...
... seen when we look in the direction of the constellation of Orion. Begin making an H-R diagram for the stars in Orion (Table II). Plot the MV values (MV again is simply absolute magnitude, M, with the subscript indicating that the magnitude is measured in the visual part of the spectrum) against the ...
Activity: Star Classification - d
... Part 1: Exploring with Classification Each group will receive 1 set of 27 stars. Every star has: a color, name, temperature, size, & luminosity value o The luminosity is compared to the sun's luminosity. If a star has a luminosity value of 5, then it is 5 times brighter than our sun. If a star h ...
... Part 1: Exploring with Classification Each group will receive 1 set of 27 stars. Every star has: a color, name, temperature, size, & luminosity value o The luminosity is compared to the sun's luminosity. If a star has a luminosity value of 5, then it is 5 times brighter than our sun. If a star h ...
presentation source
... “This, I imagine, is why the oldest members of the stellar system…are so large and populous, for the available material was richer then. As the layer of dust and gas sank toward the galactic plane, stars continued to form. Dust and gas still lie dense in this layer, and stars are still being formed ...
... “This, I imagine, is why the oldest members of the stellar system…are so large and populous, for the available material was richer then. As the layer of dust and gas sank toward the galactic plane, stars continued to form. Dust and gas still lie dense in this layer, and stars are still being formed ...
Celestial Distances
... One of the two special types of variable stars used for measuring distances are the cepheids They are are large, yellow, pulsating stars named for the first-known one of the group, Delta Cephei ...
... One of the two special types of variable stars used for measuring distances are the cepheids They are are large, yellow, pulsating stars named for the first-known one of the group, Delta Cephei ...
The Milky Way
... high-energy particles At this time, no star capable of producing a supernova is less than 50 ly away. The most massive star known (~ 100 solar masses) is ~ 25,000 ly from ...
... high-energy particles At this time, no star capable of producing a supernova is less than 50 ly away. The most massive star known (~ 100 solar masses) is ~ 25,000 ly from ...
Balloon Man in Perseus + 3 charts
... I remember the first time I stumbled on the spectacular Double Cluster in Perseus, which appears on star atlases as NGC 869 and NGC 884. I was observing back in the early 1970's using the "poking around" method with my trusty RV-6 and an Edmund 28mm war surplus Erfle eyepiece with no field stop. Sud ...
... I remember the first time I stumbled on the spectacular Double Cluster in Perseus, which appears on star atlases as NGC 869 and NGC 884. I was observing back in the early 1970's using the "poking around" method with my trusty RV-6 and an Edmund 28mm war surplus Erfle eyepiece with no field stop. Sud ...
Lecture 13
... • Measurements of astronomical objects are made by different telescopes and instruments all over the world • When imaging astronomical objects, it is common to place one of several different filters (conceptually, a colored piece of glass) in the optical system to measure the color of an object quan ...
... • Measurements of astronomical objects are made by different telescopes and instruments all over the world • When imaging astronomical objects, it is common to place one of several different filters (conceptually, a colored piece of glass) in the optical system to measure the color of an object quan ...
guide to orion 3-d flythrough
... The central area of the nebula is called the Trapezium cluster. It is dominated by four young, massive stars in a kite-like arrangement. The brightest of these stars, which has a luminosity 100,000 times that of the Sun, provides the energy that creates the nebula as we see it. It produces a flood o ...
... The central area of the nebula is called the Trapezium cluster. It is dominated by four young, massive stars in a kite-like arrangement. The brightest of these stars, which has a luminosity 100,000 times that of the Sun, provides the energy that creates the nebula as we see it. It produces a flood o ...
Computer Lecture Notes
... the motion of stars and galaxies in their mutual gravity fields. As a result, techniques that once formed the basis of astronomy are no longer part of the regular teaching programme, and many astronomers would be hard put to compute the time of sunrise, the position of a planet with respect to the h ...
... the motion of stars and galaxies in their mutual gravity fields. As a result, techniques that once formed the basis of astronomy are no longer part of the regular teaching programme, and many astronomers would be hard put to compute the time of sunrise, the position of a planet with respect to the h ...
Chapter 13: The Death of Stars
... high-energy particles At this time, no star capable of producing a supernova is less than 50 ly away. The most massive star known (~ 100 solar masses) is ~ 25,000 ly from ...
... high-energy particles At this time, no star capable of producing a supernova is less than 50 ly away. The most massive star known (~ 100 solar masses) is ~ 25,000 ly from ...
May 2016 night sky chart
... For Darwin and similar locations the chart will still apply, but some stars will be lost off the southern edge while extra stars will be visible to the north. Stars down to a brightness or magnitude limit of 4.5 are shown on the star chart. To use this star chart, rotate the chart so that the direct ...
... For Darwin and similar locations the chart will still apply, but some stars will be lost off the southern edge while extra stars will be visible to the north. Stars down to a brightness or magnitude limit of 4.5 are shown on the star chart. To use this star chart, rotate the chart so that the direct ...
Lecture 17 Review
... Thus, remote clusters appear dimmer and redder than expected from their distance and age. Interstellar extinction - When enough gas and dust is in the way, far away objects cannot be seen because light is scattered out of the line of sight. Thus, we cannot see the galactic center with visible light. ...
... Thus, remote clusters appear dimmer and redder than expected from their distance and age. Interstellar extinction - When enough gas and dust is in the way, far away objects cannot be seen because light is scattered out of the line of sight. Thus, we cannot see the galactic center with visible light. ...
27.1: Characteristics of Stars
... About 3 billion can be seen through ground-based telescopes Over 1 trillion can be observed from the Hubble Space Telescope The visibility of a star depends on its brightness and its distance from the Earth. Astronomers use two scales to describe the brightness of a star: apparent magnitude and abso ...
... About 3 billion can be seen through ground-based telescopes Over 1 trillion can be observed from the Hubble Space Telescope The visibility of a star depends on its brightness and its distance from the Earth. Astronomers use two scales to describe the brightness of a star: apparent magnitude and abso ...
The Evolution of Stars - hrsbstaff.ednet.ns.ca
... Gravity is the force that keeps us safely planted here on Earth, but it is more that just that. Gravity, or gravitation, is the natural phenomenon by which all objects with mass attract other objects. Without gravity the universe would be a very different place. ...
... Gravity is the force that keeps us safely planted here on Earth, but it is more that just that. Gravity, or gravitation, is the natural phenomenon by which all objects with mass attract other objects. Without gravity the universe would be a very different place. ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.