formation2
... • Most stars form in the spiral arms of galaxies • Stars form in clusters, with all types of stars forming. O,B,A,F,G,K,M • Spiral arms barely move, but gas clouds and stars orbit around the galaxy moving in and out of spiral arms • From the HR diagram, by far the most luminous stars are the O-type ...
... • Most stars form in the spiral arms of galaxies • Stars form in clusters, with all types of stars forming. O,B,A,F,G,K,M • Spiral arms barely move, but gas clouds and stars orbit around the galaxy moving in and out of spiral arms • From the HR diagram, by far the most luminous stars are the O-type ...
One way to measure distance
... • Consider Figure 0.18 on page 16 in your text. This figure shows solar eclipse paths over a world map. As a group, write a description of which eclipse your group would most like to observe together, where and when you would go to observe it, and fully explain why you selected the date and site you ...
... • Consider Figure 0.18 on page 16 in your text. This figure shows solar eclipse paths over a world map. As a group, write a description of which eclipse your group would most like to observe together, where and when you would go to observe it, and fully explain why you selected the date and site you ...
Lecture 9: Post-main sequence evolution of stars Lifespan on the
... temperature rises (the virial theorem again) • When the central temperature reaches about 108 K, helium fusion begins in the core • This process, also called the triple alpha process, converts helium to carbon and oxygen • In stars with masses less than 2-3 M, the start of He burning is explosive ...
... temperature rises (the virial theorem again) • When the central temperature reaches about 108 K, helium fusion begins in the core • This process, also called the triple alpha process, converts helium to carbon and oxygen • In stars with masses less than 2-3 M, the start of He burning is explosive ...
The Children of Earth
... the work of your fingers, the moon and the stars that you have established; what are human beings that you are mindful of them, mortals that you care for them? ...
... the work of your fingers, the moon and the stars that you have established; what are human beings that you are mindful of them, mortals that you care for them? ...
The Milky Way - 清華大學物理系歡迎頁 Welcome to
... Comparing absolute and apparent magnitudes of Cepheids, we can measure their distances (using the 1/d2 law)! The Cepheid distance measurements were the first distance determinations that worked out to distances beyond our Milky Way! Cepheids are up to ~ 40,000 times more luminous than our sun => can ...
... Comparing absolute and apparent magnitudes of Cepheids, we can measure their distances (using the 1/d2 law)! The Cepheid distance measurements were the first distance determinations that worked out to distances beyond our Milky Way! Cepheids are up to ~ 40,000 times more luminous than our sun => can ...
November Puppy Dog New Notes
... preceded them in history. We began with a simple story. We imagined a time before people, animals, plants, a time before, earth, a time when there was nothing at all. Then out of the quiet, black darkness came a great big bang and out of this big bang swirled gas and dust. As the gases clumped toget ...
... preceded them in history. We began with a simple story. We imagined a time before people, animals, plants, a time before, earth, a time when there was nothing at all. Then out of the quiet, black darkness came a great big bang and out of this big bang swirled gas and dust. As the gases clumped toget ...
Winter Stargazing - Trimble County Schools
... • First locate Orion, and imagine a straight line through his belt. • Follow the line to the southeast, and you will see Sirius perched right below it. • Sirius is the nose of the dog. • His body stretches to the southeast, and his front leg is to the west of Sirius. ...
... • First locate Orion, and imagine a straight line through his belt. • Follow the line to the southeast, and you will see Sirius perched right below it. • Sirius is the nose of the dog. • His body stretches to the southeast, and his front leg is to the west of Sirius. ...
Answers to Coursebook questions – Chapter E5
... hydrogen of the star is used up in nuclear fusion reactions. The core of the star collapses and this releases gravitational potential energy that warms the core to sufficiently high temperatures for fusion of helium in the core to begin. The suddenly released energy forces the outer layers of the st ...
... hydrogen of the star is used up in nuclear fusion reactions. The core of the star collapses and this releases gravitational potential energy that warms the core to sufficiently high temperatures for fusion of helium in the core to begin. The suddenly released energy forces the outer layers of the st ...
The magnitude scale
... The faintest object visible to the naked eye from a dark site has magnitude six. Sirius, the brightest star, has magnitude -1.4. The planets, Mercury, Venus, Mars, Jupiter and Saturn vary in brightness, but are generally quite bright - the brightest being Venus which can reach a magnitude of -4.4. ...
... The faintest object visible to the naked eye from a dark site has magnitude six. Sirius, the brightest star, has magnitude -1.4. The planets, Mercury, Venus, Mars, Jupiter and Saturn vary in brightness, but are generally quite bright - the brightest being Venus which can reach a magnitude of -4.4. ...
Binary Star Systems - d_smith.lhseducators.com
... • An eclipsing binary system is a special type of spectroscopic binary, where the orbit of the two stars is edge-on to our line of sight. • We periodically see one star pass in front of or eclipse the other star. When this happens the total amount of light that we receive from the pair dims for a fe ...
... • An eclipsing binary system is a special type of spectroscopic binary, where the orbit of the two stars is edge-on to our line of sight. • We periodically see one star pass in front of or eclipse the other star. When this happens the total amount of light that we receive from the pair dims for a fe ...
H-R Diagram Lab
... information about them. Together, they created a diagram on which they mapped stars by magnitude and spectral class. After the astronomers had completed graphing the stars, they noticed that several patterns appeared. First, they noticed that ninety per cent of the stars fell along a diagonal line f ...
... information about them. Together, they created a diagram on which they mapped stars by magnitude and spectral class. After the astronomers had completed graphing the stars, they noticed that several patterns appeared. First, they noticed that ninety per cent of the stars fell along a diagonal line f ...
File
... of the spiral, and older stars are most likely found in the center sphere. Scientists believe that the center of all spiral galaxies contains a massive black hole, an extremely dense area from which light cannot escape. Our galaxy is believed to be a barred spiral galaxy, similar in appearance to th ...
... of the spiral, and older stars are most likely found in the center sphere. Scientists believe that the center of all spiral galaxies contains a massive black hole, an extremely dense area from which light cannot escape. Our galaxy is believed to be a barred spiral galaxy, similar in appearance to th ...
galaxy_physics
... – About 10% of star mass – Collisional lose energy by radiation – Can settle to bottom of potential and make stars • Disk plane : gas creates disk stars (“cold” with small scale height) ...
... – About 10% of star mass – Collisional lose energy by radiation – Can settle to bottom of potential and make stars • Disk plane : gas creates disk stars (“cold” with small scale height) ...
astronomy review sheet2
... A) blue supergiant star with a temperature of approximately 20,000°C and a luminosity of 700,000 B) main sequence star with a temperature of approximately 6,000°C and a luminosity of 1 C) main sequence star with a temperature of approximately 4,000°C and a luminosity of 100 D) white dwarf star with ...
... A) blue supergiant star with a temperature of approximately 20,000°C and a luminosity of 700,000 B) main sequence star with a temperature of approximately 6,000°C and a luminosity of 1 C) main sequence star with a temperature of approximately 4,000°C and a luminosity of 100 D) white dwarf star with ...
proper motion
... parallax shifts with respect to the distant background of stars. Tycho Brahe improved positional measures from +/- 10 arc minutes to as good as +/- 1 arc minute, but he could measure no parallaxes. This implied either that the stars were more than 3000 Astronomical Units away, or that the Earth was ...
... parallax shifts with respect to the distant background of stars. Tycho Brahe improved positional measures from +/- 10 arc minutes to as good as +/- 1 arc minute, but he could measure no parallaxes. This implied either that the stars were more than 3000 Astronomical Units away, or that the Earth was ...
Compact Objects
... These two beams are swept around like a lighthouse due to the star’s rotation When the beam is pointed at us, the pulsar is “on”, when it is pointed away it is “off” ...
... These two beams are swept around like a lighthouse due to the star’s rotation When the beam is pointed at us, the pulsar is “on”, when it is pointed away it is “off” ...
Astronomy
... 18. What does apparent visual magnitude (mv) measure? What is the highest magnitude of stars that are still visible with the naked eye? How bright stars look from Earth. The dimmest we can see are about a magnitude of 6 ...
... 18. What does apparent visual magnitude (mv) measure? What is the highest magnitude of stars that are still visible with the naked eye? How bright stars look from Earth. The dimmest we can see are about a magnitude of 6 ...
25drake6s
... The Drake Equation In 1961, astronomer Frank Drake developed a formula to predict the number of intelligent species in our galaxy that we could communicate with right now ...
... The Drake Equation In 1961, astronomer Frank Drake developed a formula to predict the number of intelligent species in our galaxy that we could communicate with right now ...
Was kann man von offenen Sternhaufen lernen?
... • Identical distance from the Sun: +- The volume expansion of the cluster • Identical age: +- Time scale of star formation • Identical metallicity: +- Inhomogeneities of the initial GMC and the chemical evolution of the ...
... • Identical distance from the Sun: +- The volume expansion of the cluster • Identical age: +- Time scale of star formation • Identical metallicity: +- Inhomogeneities of the initial GMC and the chemical evolution of the ...
Phys 100 – Astronomy (Dr. Ilias Fernini) Review Questions for
... a. operates at a slightly lower temperature than the proton-proton chain. b. is most efficient in a star less massive than the sun. c. occurs when carbon and oxygen combine to form nitrogen, which produces energy. d. produces the energy responsible for bipolar flows. * e. combines four hydrogen nucl ...
... a. operates at a slightly lower temperature than the proton-proton chain. b. is most efficient in a star less massive than the sun. c. occurs when carbon and oxygen combine to form nitrogen, which produces energy. d. produces the energy responsible for bipolar flows. * e. combines four hydrogen nucl ...
1b91: answers to problem sheet no 1
... First two were revolutionary because they showed that heavenly bodies were not pure or perfect – third must also show this to some extent. Last three supported revolutionary view that the Earth and the other planets must orbit the Sun. Marks – total 8 (1 for each discovery and 1 for showing why it w ...
... First two were revolutionary because they showed that heavenly bodies were not pure or perfect – third must also show this to some extent. Last three supported revolutionary view that the Earth and the other planets must orbit the Sun. Marks – total 8 (1 for each discovery and 1 for showing why it w ...
Sidereal and Solar Time
... Sidereal and Solar Time We measure time according to the position of the Sun in the sky. o Our day is the time from Noon to Noon and is exactly 24 hours long. This time period is called a ``Solar Day''. It takes the Earth 23 hours 56 minutes and 4 seconds to complete a rotation. o This time pe ...
... Sidereal and Solar Time We measure time according to the position of the Sun in the sky. o Our day is the time from Noon to Noon and is exactly 24 hours long. This time period is called a ``Solar Day''. It takes the Earth 23 hours 56 minutes and 4 seconds to complete a rotation. o This time pe ...
Stellar Classification
... • Compare plotted diagram to a real HR diagram Connection to Space Odyssey Students can learn about stars at our Life of a Star interactive in Space Odyssey. Here they will choose a star based on its mass and learn about its life cycle. Knowing how the HR diagram works will help students predict wha ...
... • Compare plotted diagram to a real HR diagram Connection to Space Odyssey Students can learn about stars at our Life of a Star interactive in Space Odyssey. Here they will choose a star based on its mass and learn about its life cycle. Knowing how the HR diagram works will help students predict wha ...
Toys Watch the Sky - The Sun is a close star
... The Sun is a huge ball of glowing gases (mostly hydrogen and helium). It is the star at the centre of our Solar System. The Sun is located in an outer spiral arm of the Milky Way Galaxy, approximately 28,000 light-years from the galaxy's centre. (One light year is about 10 million million km.) In co ...
... The Sun is a huge ball of glowing gases (mostly hydrogen and helium). It is the star at the centre of our Solar System. The Sun is located in an outer spiral arm of the Milky Way Galaxy, approximately 28,000 light-years from the galaxy's centre. (One light year is about 10 million million km.) In co ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.