HW #02 Solutions
... star is 9 times greater than the distance of the brighter star. Since the brighter star is 5 pc away, then the dimmer star is 45 pc away. 3. The Earth receives about 1380 Watts/meter2 of energy from the Sun. How much energy does Saturn receive from the Sun (Saturn-Sun distance = 9.5 A.U.)? (A Watt i ...
... star is 9 times greater than the distance of the brighter star. Since the brighter star is 5 pc away, then the dimmer star is 45 pc away. 3. The Earth receives about 1380 Watts/meter2 of energy from the Sun. How much energy does Saturn receive from the Sun (Saturn-Sun distance = 9.5 A.U.)? (A Watt i ...
telescope as time machine - Galaxy Evolution Explorer
... How will scientists know how old the light is that GALEX is receiving? Scientists know that the universe is expanding. Like a chocolate chip cake in the oven, space is the “cake batter” that keeps getting bigger and bigger, while the stars and galaxies are the “chocolate chips” that keep getting far ...
... How will scientists know how old the light is that GALEX is receiving? Scientists know that the universe is expanding. Like a chocolate chip cake in the oven, space is the “cake batter” that keeps getting bigger and bigger, while the stars and galaxies are the “chocolate chips” that keep getting far ...
Astronomy - Scioly.org
... e. Both a and c above 52. Why can't the lowest-mass stars become giants? a. They never get hot enough for the triple-alpha process. b. Their gravity is too weak to stop them from expanding beyond the giant phase. c. They live so long that none has ever left the main sequence. d. The rate of hydrogen ...
... e. Both a and c above 52. Why can't the lowest-mass stars become giants? a. They never get hot enough for the triple-alpha process. b. Their gravity is too weak to stop them from expanding beyond the giant phase. c. They live so long that none has ever left the main sequence. d. The rate of hydrogen ...
Astronomy 401 Lecture 1 Overview of the Universe 1 Class overview
... distant stars might be less numerous or less luminous than nearby stars. • Assumed that universe is infinitely large. If universe extends to a maximum distance rmax λ, then only a fraction F ∼ rmax /λ of the sky will be covered with stars. Note that this result will also be found if the universe i ...
... distant stars might be less numerous or less luminous than nearby stars. • Assumed that universe is infinitely large. If universe extends to a maximum distance rmax λ, then only a fraction F ∼ rmax /λ of the sky will be covered with stars. Note that this result will also be found if the universe i ...
ABSOLUTE AND APPARENT MAGNITUDES
... As a general (not vastly accurate, but close enough) rule of thumb, the highest apparent magnitude that the naked eye can see under ideal viewing conditions is about +6. Objects can cast visible shadows around an apparent magnitude -4 (you’d need a very dark night to see them though - they’d get pr ...
... As a general (not vastly accurate, but close enough) rule of thumb, the highest apparent magnitude that the naked eye can see under ideal viewing conditions is about +6. Objects can cast visible shadows around an apparent magnitude -4 (you’d need a very dark night to see them though - they’d get pr ...
Chapter 09 - The Independent School
... parallax, nearby stars also show continuous motions across the sky. ...
... parallax, nearby stars also show continuous motions across the sky. ...
Introduction to Basic Stargazing Part I - Naples Free-Net
... of +9.06 - which you now understand means its almost 16 times dimmer than the dimmest star than can be seen by the unaided eye. A pair of 7x50 binoculars could spot it though - 7x50's enable you to see down to +9.5 magnitude objects or even +10.3 in the darkest skies The magnitude of planets varies ...
... of +9.06 - which you now understand means its almost 16 times dimmer than the dimmest star than can be seen by the unaided eye. A pair of 7x50 binoculars could spot it though - 7x50's enable you to see down to +9.5 magnitude objects or even +10.3 in the darkest skies The magnitude of planets varies ...
Chapter 13
... • Most luminous yellow giants on an H-R diagram are aging high-mass stars • Less luminous yellow giants are low-mass stars that have completed their first red giant stage • Regardless of mass, many yellow giants pulsate in size and luminosity ...
... • Most luminous yellow giants on an H-R diagram are aging high-mass stars • Less luminous yellow giants are low-mass stars that have completed their first red giant stage • Regardless of mass, many yellow giants pulsate in size and luminosity ...
Solutions
... 2. Type Ia and Type II Supernovae are each explosions that signify the death of a star and which are briefly as luminous as an entire galaxy. However, they are very different sorts of objects. What is the original source of the energy which powers each type of explosion? (I.e. where did the energy ...
... 2. Type Ia and Type II Supernovae are each explosions that signify the death of a star and which are briefly as luminous as an entire galaxy. However, they are very different sorts of objects. What is the original source of the energy which powers each type of explosion? (I.e. where did the energy ...
MS Word version
... This is a good time to emphasize that the light curve is showing normalized flux and that as we change the radius of a star we are changing the value of the total flux. If you now decrease the radius of star 1 the eclipses will get deeper until the two stars have the same radius (Example 1) and then ...
... This is a good time to emphasize that the light curve is showing normalized flux and that as we change the radius of a star we are changing the value of the total flux. If you now decrease the radius of star 1 the eclipses will get deeper until the two stars have the same radius (Example 1) and then ...
Chapter 13: Interstellar Matter and Star Formation
... 1. The observed dark areas in the sky are caused by giant clouds of interstellar dust that block light from stars behind them. 2. In the 1930s, astronomers became aware that grains of dust exist throughout space. Interstellar cirrus clouds are faint, diffuse dust clouds found throughout interstellar ...
... 1. The observed dark areas in the sky are caused by giant clouds of interstellar dust that block light from stars behind them. 2. In the 1930s, astronomers became aware that grains of dust exist throughout space. Interstellar cirrus clouds are faint, diffuse dust clouds found throughout interstellar ...
Magnitude Scale and Distance Measurements
... and this give us a way to find the relative intensities of any two stars, based on their apparent magnitudes. Try a few examples: 1. The apparent magnitude of Spica is +0.98, and the apparent magnitude of Sirius A is -1.44. How many times brighter is Sirius A than Spica? 2. The apparent magnitude of ...
... and this give us a way to find the relative intensities of any two stars, based on their apparent magnitudes. Try a few examples: 1. The apparent magnitude of Spica is +0.98, and the apparent magnitude of Sirius A is -1.44. How many times brighter is Sirius A than Spica? 2. The apparent magnitude of ...
Measuring Motion, Doppler Effect—28 Oct Outline • Announcements
... – A single wavelength is seen on 1 Oct. – Two wavelengths are seen on 2 Oct – Separation of two wavelengths grows larger, then smaller. ...
... – A single wavelength is seen on 1 Oct. – Two wavelengths are seen on 2 Oct – Separation of two wavelengths grows larger, then smaller. ...
Neutron Star - Perry Local Schools
... from the star’s center, and cooler gas sinks toward the center. – During radiation, atoms absorb energy and transfer it to other atoms in random directions. Atoms near the star’s surface radiate energy into space. ...
... from the star’s center, and cooler gas sinks toward the center. – During radiation, atoms absorb energy and transfer it to other atoms in random directions. Atoms near the star’s surface radiate energy into space. ...
Double Stars Discovered by IOTA Predicted Occultations July, 2010
... event, with the brighter of the two stars occulted first. A double asteroid is precluded by the fact that the magnitude drops are different between the two events. Two light curves are shown to verify the ‘events’ were not affected by other non-occultation variations. ...
... event, with the brighter of the two stars occulted first. A double asteroid is precluded by the fact that the magnitude drops are different between the two events. Two light curves are shown to verify the ‘events’ were not affected by other non-occultation variations. ...
The Milky Way
... • The gravitational field of this spiral pattern causes stars and gas to slow down near the arm • This compresses the interstellar clouds, triggering the formation of stars • The entire arm pattern rotates around the Milky Way once every 500 million years ...
... • The gravitational field of this spiral pattern causes stars and gas to slow down near the arm • This compresses the interstellar clouds, triggering the formation of stars • The entire arm pattern rotates around the Milky Way once every 500 million years ...
X-ray output should be time variable
... THEORY •O star X-ray emission comes from shock-heated gas present in their stellar winds; for B stars, the situation is more uncertain, and their Xrays may be related to magnetic fields, at least in some cases. The same may be true for certain O stars too. • Unstable mass flow driven by the radiatio ...
... THEORY •O star X-ray emission comes from shock-heated gas present in their stellar winds; for B stars, the situation is more uncertain, and their Xrays may be related to magnetic fields, at least in some cases. The same may be true for certain O stars too. • Unstable mass flow driven by the radiatio ...
INTERSTELLAR MedLab
... Reflection – dust clouds that reflect (scatter) a star’s light to us Dark – high densities of dust and gas that redden or extinct the light from the stars located behind the cloud. These are also where molecules are likely to be found. During the course of this laboratory exercise, you will study th ...
... Reflection – dust clouds that reflect (scatter) a star’s light to us Dark – high densities of dust and gas that redden or extinct the light from the stars located behind the cloud. These are also where molecules are likely to be found. During the course of this laboratory exercise, you will study th ...
ANTARES - National Optical Astronomy Observatory
... the core-collapse of a massive star, is a spectacular event. They are highly energetic and thus bright and visible over cosmological distances. Supernovae help us to understand the end states of stellar evolution (e.g., Langer, 2012), physics in extreme environments (e.g., Sukhbold & Woosley, 2016), ...
... the core-collapse of a massive star, is a spectacular event. They are highly energetic and thus bright and visible over cosmological distances. Supernovae help us to understand the end states of stellar evolution (e.g., Langer, 2012), physics in extreme environments (e.g., Sukhbold & Woosley, 2016), ...
81 KB - CSIRO Publishing
... of avoidance, which cannot be entirely due to selection effects, of size 40orho100 pc within which objects are very rare (Belokurov et al. 2007; Gilmore et al. 2007). Gilmore et al. have argued that the few objects within this zone of avoidance are special cases which are probably not in equilibrium ...
... of avoidance, which cannot be entirely due to selection effects, of size 40orho100 pc within which objects are very rare (Belokurov et al. 2007; Gilmore et al. 2007). Gilmore et al. have argued that the few objects within this zone of avoidance are special cases which are probably not in equilibrium ...
Constellations, Looking Far Away, and Stars/Stellar Evolution
... Read aloud. The graph of how the temperatures and luminosities of stars are related is known as the Hertzsprung-Russell or H-R diagram. From this graph, we can also get an estimate of the size of a star, its radius. Astronomers worked with this graph long before they knew why stars varied in this wa ...
... Read aloud. The graph of how the temperatures and luminosities of stars are related is known as the Hertzsprung-Russell or H-R diagram. From this graph, we can also get an estimate of the size of a star, its radius. Astronomers worked with this graph long before they knew why stars varied in this wa ...
Serpens
Serpens (""the Serpent"", Greek Ὄφις) is a constellation of the northern hemisphere. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations defined by the International Astronomical Union. It is unique among the modern constellations in being split into two non-contiguous parts, Serpens Caput (Serpent's Head) to the west and Serpens Cauda (Serpent's Tail) to the east. Between these two halves lies the constellation of Ophiuchus, the ""Serpent-Bearer"". In figurative representations, the body of the serpent is represented as passing behind Ophiuchus between Mu Serpentis in Serpens Caput and Nu Serpentis in Serpens Cauda.The brightest star in Serpens is the red giant star Alpha Serpentis, or Unukalhai, in Serpens Caput, with an apparent magnitude of 2.63. Also located in Serpens Caput are the naked-eye globular cluster Messier 5 and the naked-eye variables R Serpentis and Tau4 Serpentis. Notable extragalactic objects include Seyfert's Sextet, one of the densest galaxy clusters known; Arp 220, the prototypical ultraluminous infrared galaxy; and Hoag's Object, the most famous of the very rare class of galaxies known as ring galaxies.Part of the Milky Way's galactic plane passes through Serpens Cauda, which is therefore rich in galactic deep-sky objects, such as the Eagle Nebula (IC 4703) and its associated star cluster Messier 16. The nebula measures 70 light-years by 50 light-years and contains the Pillars of Creation, three dust clouds that became famous for the image taken by the Hubble Space Telescope. Other striking objects include the Red Square Nebula, one of the few objects in astronomy to take on a square shape; and Westerhout 40, a massive nearby star-forming region consisting of a molecular cloud and an H II region.