Small images
... its center. 570 ly away. Variable star. 1000 times as luminous as the sun Rigel - brightest star in Orion by (a bit more than -Orionis = Betelgeuse – a variable) 7th brightest star in the sky. 770 ly. Most luminous star in our region of galaxy. A blue supergiant star, 17 solar masses. Brightness va ...
... its center. 570 ly away. Variable star. 1000 times as luminous as the sun Rigel - brightest star in Orion by (a bit more than -Orionis = Betelgeuse – a variable) 7th brightest star in the sky. 770 ly. Most luminous star in our region of galaxy. A blue supergiant star, 17 solar masses. Brightness va ...
Lecture 9: Stellar Spectra
... Most of the H is ionized, so only very weak H lines in visible A Stars (7500-11,000K) Ideal excitation conditions, strongest H lines in visible. G stars (5200-5900 K) Too cool, little excited H, so only weak H lines in the visible Line strengths diagram shown in Figure 19-12 ...
... Most of the H is ionized, so only very weak H lines in visible A Stars (7500-11,000K) Ideal excitation conditions, strongest H lines in visible. G stars (5200-5900 K) Too cool, little excited H, so only weak H lines in the visible Line strengths diagram shown in Figure 19-12 ...
The Ancient Heavens: Exploring the History of Astronomy
... these activities help participants appreciate not only what we know, but how we know it. ...
... these activities help participants appreciate not only what we know, but how we know it. ...
Lecture 10 - University of Minnesota
... allow particles to be packed too close together • In order for stars below about .08 solar masses, you would need to violate the Exclusion Principle in order to reach necessary densities ...
... allow particles to be packed too close together • In order for stars below about .08 solar masses, you would need to violate the Exclusion Principle in order to reach necessary densities ...
Observations and Theoretical Models of Subdwarfs
... spectra of these stars demonstrated abnormally faint metallic lines for their spectral class. Four years later, Gerard Kuiper renamed them “subdwarfs” after observing that these intermediate stars had less in common with the degenerate white dwarfs than they did with main sequence dwarf stars [1]. S ...
... spectra of these stars demonstrated abnormally faint metallic lines for their spectral class. Four years later, Gerard Kuiper renamed them “subdwarfs” after observing that these intermediate stars had less in common with the degenerate white dwarfs than they did with main sequence dwarf stars [1]. S ...
The Milky Way: Home to Star Clusters
... was the original extent of the galaxy, and that this was created first, from the primordial gas that eventually collapsed in on itself, also demonstrated by the old stars contained within the globular clusters. This matter condensed to create the central bulge, which ultimately began to rotate, crea ...
... was the original extent of the galaxy, and that this was created first, from the primordial gas that eventually collapsed in on itself, also demonstrated by the old stars contained within the globular clusters. This matter condensed to create the central bulge, which ultimately began to rotate, crea ...
Using the Southern Cross to find south
... in the sky and therefore upside-down). 3. Extend the line four and a half times the length of the cross. 4. This will bring you to the point in the sky called the South Celestial Pole. 5. From this point, drop a line vertically down to the horizon. This gives you the direction of true south. Compass ...
... in the sky and therefore upside-down). 3. Extend the line four and a half times the length of the cross. 4. This will bring you to the point in the sky called the South Celestial Pole. 5. From this point, drop a line vertically down to the horizon. This gives you the direction of true south. Compass ...
Sirius Astronomer - Orange County Astronomers
... equator have long been mysteries. Using archived images from Cassini when it passed Jupiter on its way to Saturn, scientists have studied the hot spots and determined that they fit the pattern of a Rossby wave, a pattern also seen in Earth’s atmosphere and oceans. The wave responsible for the hot sp ...
... equator have long been mysteries. Using archived images from Cassini when it passed Jupiter on its way to Saturn, scientists have studied the hot spots and determined that they fit the pattern of a Rossby wave, a pattern also seen in Earth’s atmosphere and oceans. The wave responsible for the hot sp ...
PPT - Yale University
... Angular Momentum and the Formation of Stars and Black Holes Richard B. Larson Yale University ...
... Angular Momentum and the Formation of Stars and Black Holes Richard B. Larson Yale University ...
Good Vibrations and Stellar Pulsations - Physics
... homepage.mac.com/kvmagruder/bcp/aster/constellations/Sgr.htm ...
... homepage.mac.com/kvmagruder/bcp/aster/constellations/Sgr.htm ...
Our Galaxy, the Milky Way Galaxy
... All galaxies are moving away from us and are red because of this There is a super massive black hole at the center of our (and every other) galaxy that is maybe a billion solar masses Only important to find out how the stars near the center of a galaxy rotate We do not know where the black holes cam ...
... All galaxies are moving away from us and are red because of this There is a super massive black hole at the center of our (and every other) galaxy that is maybe a billion solar masses Only important to find out how the stars near the center of a galaxy rotate We do not know where the black holes cam ...
Distant Stars Lesson Plan
... Assessment options: Here are two assessment options: 1. Take a simple quiz. Print and distribute the quiz on page 4. Here are the answers: What is the one factor that determines a star’s color? Answer: b) Its temperature On the H-R Diagram, most stars fall on the diagonal line from the upper lef ...
... Assessment options: Here are two assessment options: 1. Take a simple quiz. Print and distribute the quiz on page 4. Here are the answers: What is the one factor that determines a star’s color? Answer: b) Its temperature On the H-R Diagram, most stars fall on the diagonal line from the upper lef ...
A Story about a Star`s Life
... • A star’s apparent magnitude depends on the star’s luminosity and distance – a star may appear dim because it is very far away or it does not emit much energy ...
... • A star’s apparent magnitude depends on the star’s luminosity and distance – a star may appear dim because it is very far away or it does not emit much energy ...
Final Exam - Practice questions for Unit V
... the smaller its radius when on the main sequence. ...
... the smaller its radius when on the main sequence. ...
ppt
... finest objects to be seen. Visually, however, it is large and faint, with few details. This galaxy is seen edge on from our earth (This means we look exactly at it's galactic plane). ...
... finest objects to be seen. Visually, however, it is large and faint, with few details. This galaxy is seen edge on from our earth (This means we look exactly at it's galactic plane). ...
Tutorial: Motion
... If you get stuck or are not sure of your answer ask another group If you get really stuck or don’t understand what the Lecture Tutorial is asking as one of us for help ...
... If you get stuck or are not sure of your answer ask another group If you get really stuck or don’t understand what the Lecture Tutorial is asking as one of us for help ...
H-R Diagram
... In the early 1900s, astronomers were able to identify many star characteristics such as color, size, temperature, and luminosity—or how bright a star is. Using the H-R Diagram Gizmo™, you will discover how some of these characteristics are related. Start by moving your cursor over the stars in the S ...
... In the early 1900s, astronomers were able to identify many star characteristics such as color, size, temperature, and luminosity—or how bright a star is. Using the H-R Diagram Gizmo™, you will discover how some of these characteristics are related. Start by moving your cursor over the stars in the S ...
The Milky Way - Houston Community College System
... parallax, nearby stars also show continuous motions across the sky. ...
... parallax, nearby stars also show continuous motions across the sky. ...
The Sun and other Stars
... relatively cool. They appear red because of their low temperature. They are in the upper right corner of the H-R diagram. (page 379) Gas giants have relatively _________________________ ...
... relatively cool. They appear red because of their low temperature. They are in the upper right corner of the H-R diagram. (page 379) Gas giants have relatively _________________________ ...
Perseus (constellation)
Perseus, named after the Greek mythological hero Perseus, is a constellation in the northern sky. It was one of 48 listed by the 2nd-century astronomer Ptolemy and among the 88 modern constellations defined by the International Astronomical Union (IAU). It is located in the northern celestial hemisphere near several other constellations named after legends surrounding Perseus, including Andromeda to the west and Cassiopeia to the north. Perseus is also bordered by Aries and Taurus to the south, Auriga to the east, Camelopardalis to the north, and Triangulum to the west.The galactic plane of the Milky Way passes through Perseus but is mostly obscured by molecular clouds. The constellation's brightest star is the yellow-white supergiant Alpha Persei (also called Mirfak), which shines at magnitude 1.79. It and many of the surrounding stars are members of an open cluster known as the Alpha Persei Cluster. The best-known star, however, is Algol (Beta Persei), linked with ominous legends because of its variability, which is noticeable to the naked eye. Rather than being an intrinsically variable star, it is an eclipsing binary. Other notable star systems in Perseus include X Persei, a binary system containing a neutron star, and GK Persei, a nova that peaked at magnitude 0.2 in 1901. The Double Cluster, comprising two open clusters quite near each other in the sky, was known to the ancient Chinese. The constellation gives its name to the Perseus Cluster (Abell 426), a massive galaxy cluster located 250 million light-years from Earth. It hosts the radiant of the annual Perseids meteor shower—one of the most prominent meteor showers in the sky.