Doppler Shift - El Camino College
... 8. You overhear two students discussing the topic of Doppler shifts. Student 1: Since Betelgeuse is a red star, it must be going away from us, and since Rigel is a blue star it must be coming towards us. Student 2: I disagree, the color of the star does not tell you if it is moving. You have to look ...
... 8. You overhear two students discussing the topic of Doppler shifts. Student 1: Since Betelgeuse is a red star, it must be going away from us, and since Rigel is a blue star it must be coming towards us. Student 2: I disagree, the color of the star does not tell you if it is moving. You have to look ...
Luminosity
... These two stars have about the same luminosity -- which one appears brighter? A. Alpha Centauri B. The Sun ...
... These two stars have about the same luminosity -- which one appears brighter? A. Alpha Centauri B. The Sun ...
notes
... Wide Field and Planetary Camera 2 (WFPC2) for ten consecutive days between December 18 and 28, 1995. 1,500 galaxies at various stages of evolution. Most of the galaxies are so faint (nearly 30th magnitude or about four-billion times fainter than can be seen by the human eye) they have never before b ...
... Wide Field and Planetary Camera 2 (WFPC2) for ten consecutive days between December 18 and 28, 1995. 1,500 galaxies at various stages of evolution. Most of the galaxies are so faint (nearly 30th magnitude or about four-billion times fainter than can be seen by the human eye) they have never before b ...
Review: How does a star`s mass determine its life story?
... – A black hole is a massive object whose radius is so small that the escape velocity exceeds the speed of light ...
... – A black hole is a massive object whose radius is so small that the escape velocity exceeds the speed of light ...
ph709-15-testrevision
... Short period giant planets in close orbits around their stars will undergo reflected light variations changes because, like the Moon, they will go through phases from full to new and back again. Since telescopes cannot resolve the planet from the star, they see only the combined light, and the brigh ...
... Short period giant planets in close orbits around their stars will undergo reflected light variations changes because, like the Moon, they will go through phases from full to new and back again. Since telescopes cannot resolve the planet from the star, they see only the combined light, and the brigh ...
The gorilla connection
... and causing it to brighten and fade with a characteristic ‘light curve’ over a period of weeks (Fig. 1a). If the nearer star possesses a planet, it too acts as a lens, altering the light curve accordingly (Fig. 1b). This alteration can be large, even for a low-mass planet, but the deviation lasts fo ...
... and causing it to brighten and fade with a characteristic ‘light curve’ over a period of weeks (Fig. 1a). If the nearer star possesses a planet, it too acts as a lens, altering the light curve accordingly (Fig. 1b). This alteration can be large, even for a low-mass planet, but the deviation lasts fo ...
Falling Stars
... hundreds of stars falling every minute! All night, the sky was brightened by meteors that rocketed through the night by the thousands! Since no telescopes or fancy equipment were needed to see the storm, ordinary people were able to see that wonderful and rare sight. Many artists tried to paint pict ...
... hundreds of stars falling every minute! All night, the sky was brightened by meteors that rocketed through the night by the thousands! Since no telescopes or fancy equipment were needed to see the storm, ordinary people were able to see that wonderful and rare sight. Many artists tried to paint pict ...
CHAPTER 30: STARS, GALAXIES AND THE UNIVERSE Analyzing
... Stars such as our sun are considered medium-sized stars. The sun has a diameter of 1,390,000 km. Most of the stars you can see in the night sky are medium-sized stars. Many stars also have about the same mass as the sun, however some stars may be more or less massive. Stellar Motion Apparent Motion ...
... Stars such as our sun are considered medium-sized stars. The sun has a diameter of 1,390,000 km. Most of the stars you can see in the night sky are medium-sized stars. Many stars also have about the same mass as the sun, however some stars may be more or less massive. Stellar Motion Apparent Motion ...
Analysis of Two Pulsating X-ray Sources
... exhibit variations in X-ray brightness that appear to display some regularity. This activity is a pencil and paper version that uses screenshots from ds9 – an image analysis software package – to analyze GK Per and Cen X-3 – in order to determine if they are white dwarfs and/or neutron stars. The ph ...
... exhibit variations in X-ray brightness that appear to display some regularity. This activity is a pencil and paper version that uses screenshots from ds9 – an image analysis software package – to analyze GK Per and Cen X-3 – in order to determine if they are white dwarfs and/or neutron stars. The ph ...
Stars 3
... Nebula. These include wisp-like structures that move outward away from the pulsar at half the speed of light, as well as a mysterious “halo” which remains stationary, but grows brighter then fainter over time. Also seen are the effects of two polar jets that move out along the rotation axis of the p ...
... Nebula. These include wisp-like structures that move outward away from the pulsar at half the speed of light, as well as a mysterious “halo” which remains stationary, but grows brighter then fainter over time. Also seen are the effects of two polar jets that move out along the rotation axis of the p ...
The Parent Stars of New Extrasolar Planet System Candidates
... it is possible that an inward-migrating planet was accreted by the star, thus changing the stellar surface and explaining the odd abundances observed. Unlike Gliese 876, the two stars HR 810 and HR 7875 are very similar to the sun. They are each close to one solar mass and are slightly younger than ...
... it is possible that an inward-migrating planet was accreted by the star, thus changing the stellar surface and explaining the odd abundances observed. Unlike Gliese 876, the two stars HR 810 and HR 7875 are very similar to the sun. They are each close to one solar mass and are slightly younger than ...
PPTX
... • From 2003 to 2010 over 100 spectra obtained with SMARTS 1.5m • No mass-loss events were detected ...
... • From 2003 to 2010 over 100 spectra obtained with SMARTS 1.5m • No mass-loss events were detected ...
Lecture 12
... The magnitude system • Astronomers quantify the intensity of light produced by a source with the unit magnitudes • Magnitudes are a logarithmic representation of the spectral flux density of a source. – Allows for easy comparison of sources with immense ranges in ...
... The magnitude system • Astronomers quantify the intensity of light produced by a source with the unit magnitudes • Magnitudes are a logarithmic representation of the spectral flux density of a source. – Allows for easy comparison of sources with immense ranges in ...
Reach for the Stars – Div. B
... 1a. Stars are categorized by their spectral class 1b. Hertzsprung-Russell (H-R) diagram is a way to represent the evolution of stars 2. The Main sequence is the location of stars on the H-R diagram where stars spend most of their lives: Hydrogen fusing to Helium in the star’s core 3. Stars remain s ...
... 1a. Stars are categorized by their spectral class 1b. Hertzsprung-Russell (H-R) diagram is a way to represent the evolution of stars 2. The Main sequence is the location of stars on the H-R diagram where stars spend most of their lives: Hydrogen fusing to Helium in the star’s core 3. Stars remain s ...
Phys 100 – Astronomy (Dr. Ilias Fernini) Review Questions for
... 31. The region of the sun just below the photosphere a. is undergoing thermonuclear fusion using the proton-proton chain. b. is undergoing thermonuclear fusion using the CNO cycle. * c. is transporting energy to the photosphere by convection. d. is not in hydrostatic equilibrium. e. a and c above 32 ...
... 31. The region of the sun just below the photosphere a. is undergoing thermonuclear fusion using the proton-proton chain. b. is undergoing thermonuclear fusion using the CNO cycle. * c. is transporting energy to the photosphere by convection. d. is not in hydrostatic equilibrium. e. a and c above 32 ...
α Cen A + iodine cell spectrum - Department of Physics and Astronomy
... by Guedes et al. for α CenB. All simulations yield 1 to 4 Earth-mass planets of which 42% lie inside the star’s habitable zone (dashed lines). The planetary configuration of the solar system is shown for reference. Starting conditions: N lunar-mass bodies in a disk with 1/a surface density. ...
... by Guedes et al. for α CenB. All simulations yield 1 to 4 Earth-mass planets of which 42% lie inside the star’s habitable zone (dashed lines). The planetary configuration of the solar system is shown for reference. Starting conditions: N lunar-mass bodies in a disk with 1/a surface density. ...
Why is there a main sequence?
... Stars form from the interstellar medium and reach stability fusing hydrogen in their cores. This chapter is about the long, stable middle age of stars on the main sequence, and their old age as they swell to become giant stars. Here you will answer four important questions: • Why is there a main seq ...
... Stars form from the interstellar medium and reach stability fusing hydrogen in their cores. This chapter is about the long, stable middle age of stars on the main sequence, and their old age as they swell to become giant stars. Here you will answer four important questions: • Why is there a main seq ...
parallax
... apparent shift in the position of an object due to the change in position of the observer. To see an example of this, hold a finger up at arm’s length in front of you. Close one eye, and line up your finger with a distant object. Now look at your finger with the other eye – it will no longer be line ...
... apparent shift in the position of an object due to the change in position of the observer. To see an example of this, hold a finger up at arm’s length in front of you. Close one eye, and line up your finger with a distant object. Now look at your finger with the other eye – it will no longer be line ...
Astronomy 114 – Summary of Important Concepts #2 1 Stars: key
... Q: A star has an absolute magnitude of 4 and lies 1 parsec from the Earth. Suppose that star is moved to a distance of 10 parsecs from the Sun. What is its absolute magnitude? A: The absolute magnitude is still 4. Absolute magnitude does not depend on distance. It measures the luminosity of the star ...
... Q: A star has an absolute magnitude of 4 and lies 1 parsec from the Earth. Suppose that star is moved to a distance of 10 parsecs from the Sun. What is its absolute magnitude? A: The absolute magnitude is still 4. Absolute magnitude does not depend on distance. It measures the luminosity of the star ...
Star of Bethlehem
In Christian tradition, the Star of Bethlehem, also called the Christmas Star, revealed the birth of Jesus to the Biblical Magi, and later led them to Bethlehem. The star appears only in the nativity story of the Gospel of Matthew, where astrologers from the east are inspired by the star to travel to Jerusalem. There they meet King Herod of Judea, and ask where the king of the Jews had been born. Herod, following a verse from the Book of Micah interpreted as a prophecy, directs them to Bethlehem, to the south of Jerusalem. The star leads them to Jesus' home in the town, where they worship him and give him gifts. The wise men are then given a divine warning not to return to Herod so they return home by a different route.Many Christians see the star as a miraculous sign to mark the birth of the Christ (or messiah). Some theologians claimed that the star fulfilled a prophecy, known as the Star Prophecy. Astronomers have made several attempts to link the star to unusual astronomical events, such as a conjunction of Jupiter and Saturn, a comet or a supernova.Many modern scholars do not consider the story to be describing a historical event but a pious fiction created by the author of the Gospel of Matthew.The subject is a favorite at planetarium shows during the Christmas season, although the Biblical account describes Jesus with a broader Greek word, which can mean either ""infant"" or ""child"" (paidon), rather than the more specific word for infant (brephos), possibly implying that some time has passed since the birth. The visit is traditionally celebrated on Epiphany (January 6) in Western Christianity.