color magnitude diagrams - AST 114, Astronomy Lab II for Spring
... more blue. Conversely, the cooler the star, the redder the star. This produces, at times, the counterintuitive result that hotter things are more blue, and colder things are more red. Anyway, if you can measure the brightest color in a stars © 2015 Arizona State University ...
... more blue. Conversely, the cooler the star, the redder the star. This produces, at times, the counterintuitive result that hotter things are more blue, and colder things are more red. Anyway, if you can measure the brightest color in a stars © 2015 Arizona State University ...
Document
... • The scenario that leads to nova explosions can produce an even wilder phenomenon. • In the early 1900s `novae’ were sometimes observed in other galaxies and were used to help set the distances to galaxies. • But, when it became clear that even the nearest galaxies were much further away than anyon ...
... • The scenario that leads to nova explosions can produce an even wilder phenomenon. • In the early 1900s `novae’ were sometimes observed in other galaxies and were used to help set the distances to galaxies. • But, when it became clear that even the nearest galaxies were much further away than anyon ...
Measuring Stars` Properties - Test 1 Study Guide
... Distances to Stars • Important as determines actual brightness but hard to measure as stars are so far away Closest Alpha Centauri 4.3 light years = 4 x 1013 km (1 AU = distance Earth to Sun = 8 light minutes) • Close stars use stellar parallax (heliocentric parallax or triangulation ! same meani ...
... Distances to Stars • Important as determines actual brightness but hard to measure as stars are so far away Closest Alpha Centauri 4.3 light years = 4 x 1013 km (1 AU = distance Earth to Sun = 8 light minutes) • Close stars use stellar parallax (heliocentric parallax or triangulation ! same meani ...
Slide 1
... stars run out of fuel and collapse into white dwarf stars, producing beautiful planetary nebulae in the process. ...
... stars run out of fuel and collapse into white dwarf stars, producing beautiful planetary nebulae in the process. ...
ASTRONOMY AND ASTROPHYSICS Letter to the Editor Low
... 1994) producing a Lyman continuum flux of 1051 s−1 (Kennicutt 1984; Drissen et al. 1995) has about 100 times the ionizing power of the Trapezium cluster. With a bolometric luminosity Lbol > 107 L , NGC 3603 has about 10% of the luminosity of 30 Doradus and looks in many respects very similar to its ...
... 1994) producing a Lyman continuum flux of 1051 s−1 (Kennicutt 1984; Drissen et al. 1995) has about 100 times the ionizing power of the Trapezium cluster. With a bolometric luminosity Lbol > 107 L , NGC 3603 has about 10% of the luminosity of 30 Doradus and looks in many respects very similar to its ...
tut35 Magnitudes
... Greek astronomers were thought to be the first to classify stars by their brightness. Around 129 B. C. Hipparchus ranked the 1,080 stars in his catalogue in a simple way; the brightest were termed “first magnitude,” the next brightest were “second magnitude” through to the “sixth magnitude.” It was ...
... Greek astronomers were thought to be the first to classify stars by their brightness. Around 129 B. C. Hipparchus ranked the 1,080 stars in his catalogue in a simple way; the brightest were termed “first magnitude,” the next brightest were “second magnitude” through to the “sixth magnitude.” It was ...
Stars III The Hertzsprung
... luminous than the other, we can be sure that the a) more luminous star will have the longer lifetime b) less luminous star is the more massive c) more luminous star is the more massive d) more luminous star will have the redder color ...
... luminous than the other, we can be sure that the a) more luminous star will have the longer lifetime b) less luminous star is the more massive c) more luminous star is the more massive d) more luminous star will have the redder color ...
Lecture 12, PPT version
... Galaxy). All of the stars formed at roughly the same time. Globular clusters have lots of RED stars, but no BLUE stars (because they died long ago and were not “replenished”). ...
... Galaxy). All of the stars formed at roughly the same time. Globular clusters have lots of RED stars, but no BLUE stars (because they died long ago and were not “replenished”). ...
Introduction to Celestial Spheres (Professor Powerpoint)
... below the North Pole, which is zero degrees, to a point directly below the ...
... below the North Pole, which is zero degrees, to a point directly below the ...
globular cluster - Harding University
... result, we now know that objects are actually about 10% farther away than we previously had thought, i.e., the universe is about 10% larger than we thought. ...
... result, we now know that objects are actually about 10% farther away than we previously had thought, i.e., the universe is about 10% larger than we thought. ...
Investigating Supernova Remnants - Chandra X
... The mass of the star’s iron core approaches 1.4 solar masses due to the continued silicon and sulfur fusion in the thin layer adjacent to the iron core, and the continued fusion of iron requires more energy than is available. Radiation pressure is no longer able to support the core against gravity ...
... The mass of the star’s iron core approaches 1.4 solar masses due to the continued silicon and sulfur fusion in the thin layer adjacent to the iron core, and the continued fusion of iron requires more energy than is available. Radiation pressure is no longer able to support the core against gravity ...
Lesson 3: Calculating distances to stars
... estimate the distance to the star. It is a rather simple principle; if a star is close by then it will appear bright, and if the star is far away it will appear dim. This method was first proposed by the Dutch astronomer, Christiaan Huygens. This method only works if all stars are the same, but this ...
... estimate the distance to the star. It is a rather simple principle; if a star is close by then it will appear bright, and if the star is far away it will appear dim. This method was first proposed by the Dutch astronomer, Christiaan Huygens. This method only works if all stars are the same, but this ...
Notes
... up, until nuclear burning ceases Masses between 0.55 and 1+ solar masses (more massive are brighter) Outflowing winds seen in “P Cygni” profiles Hydrogen abundance low, carbon abundance high (WC stars) If the stars reach T>25,000 before the gas/dust shell from the superwind dissipates, it will light ...
... up, until nuclear burning ceases Masses between 0.55 and 1+ solar masses (more massive are brighter) Outflowing winds seen in “P Cygni” profiles Hydrogen abundance low, carbon abundance high (WC stars) If the stars reach T>25,000 before the gas/dust shell from the superwind dissipates, it will light ...
In This Issue The Hottest Planet in the Solar System President`s Article
... it uses hours and minutes, like the time on a clock. The RA “clock” does indeed have 24 “hour” components in it. But the clock is not based on a solar day… instead it is based on a sidereal day. A sidereal (pronounced: sīˈdi(ə)rēəl) day is roughly 4 minutes shy of a standard 24 hour solar day. This ...
... it uses hours and minutes, like the time on a clock. The RA “clock” does indeed have 24 “hour” components in it. But the clock is not based on a solar day… instead it is based on a sidereal day. A sidereal (pronounced: sīˈdi(ə)rēəl) day is roughly 4 minutes shy of a standard 24 hour solar day. This ...
Practice Questions for Final
... B. A spaceship passing near a 10 solar mass black hole is much more likely to be destroyed than a spaceship passing at the same distance from the center of a 10 solar mass mainsequence star. C. If you watch someone else fall into a black hole, you will never see them cross the event horizon. However ...
... B. A spaceship passing near a 10 solar mass black hole is much more likely to be destroyed than a spaceship passing at the same distance from the center of a 10 solar mass mainsequence star. C. If you watch someone else fall into a black hole, you will never see them cross the event horizon. However ...
Type Ia supernovae and the ESSENCE supernova survey
... According to Kasen (2006), the secondary hump in the near-IR light curves of Type Ia supernovae is due to a transition from doubly ionized atoms to singly ionized ones. ...
... According to Kasen (2006), the secondary hump in the near-IR light curves of Type Ia supernovae is due to a transition from doubly ionized atoms to singly ionized ones. ...
Surveys of Stars, The interstellar medium
... The Coronal Gas Additional component of very hot, low-density gas in the ISM: T ~ 1 million K n ~ 0.001 particles/cm3 ...
... The Coronal Gas Additional component of very hot, low-density gas in the ISM: T ~ 1 million K n ~ 0.001 particles/cm3 ...
Define the following terms in the space provided
... You arrive in Cancun on a clear night. You look up at the stars and notice that they appear different that the stars you see in Syracuse, NY. Which of the statements below is true regarding the appearance of the stars in Cancun? Circle all that are true. A) Polaris will appear higher in the sky than ...
... You arrive in Cancun on a clear night. You look up at the stars and notice that they appear different that the stars you see in Syracuse, NY. Which of the statements below is true regarding the appearance of the stars in Cancun? Circle all that are true. A) Polaris will appear higher in the sky than ...
Joining the Party - Lincoln-Sudbury Regional High School
... sources of excitation (such as bright young stars, shockwave energy from exploding stars, or radiation from centre of an active galaxy) which provide the radiation to trigger the maser emission. ...
... sources of excitation (such as bright young stars, shockwave energy from exploding stars, or radiation from centre of an active galaxy) which provide the radiation to trigger the maser emission. ...
Cygnus (constellation)
Cygnus /ˈsɪɡnəs/ is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan. The swan is one of the most recognizable constellations of the northern summer and autumn, it features a prominent asterism known as the Northern Cross (in contrast to the Southern Cross). Cygnus was among the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations.Cygnus contains Deneb, one of the brightest stars in the night sky and one corner of the Summer Triangle, as well as some notable X-ray sources and the giant stellar association of Cygnus OB2. One of the stars of this association, NML Cygni, is one of the largest stars currently known. The constellation is also home to Cygnus X-1, a distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a black hole. Many star systems in Cygnus have known planets as a result of the Kepler Mission observing one patch of the sky, the patch is the area around Cygnus. In addition, most of the eastern part of Cygnus is dominated by the Hercules–Corona Borealis Great Wall, a giant galaxy filament that is the largest known structure in the observable universe; covering most of the northern sky.