Galaxies (and stars) in the far infrared: results from the AKARI All
... However, in the case of AKARI FIS ASS, we must rely only on four FIR bands (at longer wavelengths), and this cannot be a trivial application of IRAS methodology, since the physical processes behind emission in these bands are different. ...
... However, in the case of AKARI FIS ASS, we must rely only on four FIR bands (at longer wavelengths), and this cannot be a trivial application of IRAS methodology, since the physical processes behind emission in these bands are different. ...
Astrological Signs, Numbers and Letters and their Correspondence
... in the solar system, on Earth, was also a beginning, and these life beginnings are part of a continual creation. This is the Aries influence, which is the highest fire or first fire. So astrology begins with Aries at the vernal equinox, when nature springs back to life in the northern hemisphere, an ...
... in the solar system, on Earth, was also a beginning, and these life beginnings are part of a continual creation. This is the Aries influence, which is the highest fire or first fire. So astrology begins with Aries at the vernal equinox, when nature springs back to life in the northern hemisphere, an ...
Astro-MilkyWay
... 5. What fundamental principle did Shapley use to calibrate the period-luminosity relationship for Cepheid variable stars? a. Light intensity falls off with the inverse square of distance. b. Stars that appear brighter are on average closer to Earth. c. Large pulsating objects have longer periods tha ...
... 5. What fundamental principle did Shapley use to calibrate the period-luminosity relationship for Cepheid variable stars? a. Light intensity falls off with the inverse square of distance. b. Stars that appear brighter are on average closer to Earth. c. Large pulsating objects have longer periods tha ...
2.3 Peculiar galaxies
... skirt by each other they will perhaps pull out tidal tails from each other and then carry on. If they head close towards each other, the material is likely to orbit around in a complex manner until eventually they completely merge. Star formation in galaxies. We now move to an apparently separate su ...
... skirt by each other they will perhaps pull out tidal tails from each other and then carry on. If they head close towards each other, the material is likely to orbit around in a complex manner until eventually they completely merge. Star formation in galaxies. We now move to an apparently separate su ...
Chapter 15
... 5. What fundamental principle did Shapley use to calibrate the period-luminosity relationship for Cepheid variable stars? a. Light intensity falls off with the inverse square of distance. b. Stars that appear brighter are on average closer to Earth. c. Large pulsating objects have longer periods tha ...
... 5. What fundamental principle did Shapley use to calibrate the period-luminosity relationship for Cepheid variable stars? a. Light intensity falls off with the inverse square of distance. b. Stars that appear brighter are on average closer to Earth. c. Large pulsating objects have longer periods tha ...
Introduction: The History and Technique of Stellar Classification
... Introduction: The History and Technique of Stellar Classification Patterns of absorption lines were first observed in the spectrum of the sun by the German physicist Joseph von Fraunhofer early in the 1800’s, but it was not until late in that century that astronomers were able to routinely examine t ...
... Introduction: The History and Technique of Stellar Classification Patterns of absorption lines were first observed in the spectrum of the sun by the German physicist Joseph von Fraunhofer early in the 1800’s, but it was not until late in that century that astronomers were able to routinely examine t ...
Unit 13―The “Fixed” Stars
... It is generally understood that the outline, and hence the included stars in any constellation, would not be exactly as they are if we could start over and redefine them as we might see them via later history. Unfortunately, most of the early developments in astronomy were made by people living in t ...
... It is generally understood that the outline, and hence the included stars in any constellation, would not be exactly as they are if we could start over and redefine them as we might see them via later history. Unfortunately, most of the early developments in astronomy were made by people living in t ...
2 Galaxy morphology and classification
... The stellar halo is a di↵use, roughly spherical, system of stars and globular clusters that surrounds most large galaxies. It is comprised mostly of old, metal-poor, stars. The halo has little or no net angular momentum. It is thought to have formed, at least in part, by the accretion of small satel ...
... The stellar halo is a di↵use, roughly spherical, system of stars and globular clusters that surrounds most large galaxies. It is comprised mostly of old, metal-poor, stars. The halo has little or no net angular momentum. It is thought to have formed, at least in part, by the accretion of small satel ...
24.1 Hubble`s Galaxy Classification
... This pair of images shows the Coma cluster of galaxies. Almost every object visible is a galaxy. Coma Cluster (a) A collection of many galaxies, each consisting of hundreds of billions of stars. Called the Coma Cluster, this group of galaxies lies more than 100 million pc from Earth. (The blue spike ...
... This pair of images shows the Coma cluster of galaxies. Almost every object visible is a galaxy. Coma Cluster (a) A collection of many galaxies, each consisting of hundreds of billions of stars. Called the Coma Cluster, this group of galaxies lies more than 100 million pc from Earth. (The blue spike ...
Andromeda Check-List - Norman Lockyer Observatory
... Not very impressive but some observers report seeing asterisms within the cluster. The most popular is either a trapezium or the letter “g”. Look for a line of around 15 stars. Some observers report seeing a strong bluish tint to the stars. NGC7380 – Open Cluster - I 1 m – Easy Easily viewed through ...
... Not very impressive but some observers report seeing asterisms within the cluster. The most popular is either a trapezium or the letter “g”. Look for a line of around 15 stars. Some observers report seeing a strong bluish tint to the stars. NGC7380 – Open Cluster - I 1 m – Easy Easily viewed through ...
The Sculptor dwarf irregular galaxy SDIG: present and past
... galactic H I (Burstein & Heiles 1984). Given that SDIG is more than 10° away from the Sculptor dwarf spheroidal, a direct measurement is preferable. Thus, the authors adopt the RC3 value, namely E(B - v)gal = 0.00 mag. The internal extinction in SDIG is unknown. Based on model fits to optical surfac ...
... galactic H I (Burstein & Heiles 1984). Given that SDIG is more than 10° away from the Sculptor dwarf spheroidal, a direct measurement is preferable. Thus, the authors adopt the RC3 value, namely E(B - v)gal = 0.00 mag. The internal extinction in SDIG is unknown. Based on model fits to optical surfac ...
The Great Debate - The Story Behind The Science
... The significance of this rotational period requires understanding Shapley's size of the Milky Way. Shapley had been a supporter of the island universe idea until he determined the Milky Way to be 300,000 light-years in diameter (10x larger than the consensus estimate). He concluded this by measuring ...
... The significance of this rotational period requires understanding Shapley's size of the Milky Way. Shapley had been a supporter of the island universe idea until he determined the Milky Way to be 300,000 light-years in diameter (10x larger than the consensus estimate). He concluded this by measuring ...
Constellation Paper - Matt Hape`s Portfolio
... finding to Charles Messier who then listed M74 as a Messier object in his catalog (Messier). It is a very faint face on spiral galaxy. When it is observed, you can clearly see two spiral arms that extend from the galaxy. Its calculated distance away from Earth is about 32 million light-years away. T ...
... finding to Charles Messier who then listed M74 as a Messier object in his catalog (Messier). It is a very faint face on spiral galaxy. When it is observed, you can clearly see two spiral arms that extend from the galaxy. Its calculated distance away from Earth is about 32 million light-years away. T ...
Slide 1
... massive objects settle onto the main sequence, where they burned hydrogen into helium. After burning helium into carbon, stars run out of fuel and collapse into white dwarf stars, producing beautiful planetary nebulae in the process. ...
... massive objects settle onto the main sequence, where they burned hydrogen into helium. After burning helium into carbon, stars run out of fuel and collapse into white dwarf stars, producing beautiful planetary nebulae in the process. ...
Cartwheel Galaxy - Chandra X
... 8. Is there an X-ray candidate for an active galactic nucleus (AGN) in Arp 147? Explain. 9. Why might there not be new star formation in the elliptical galaxy on the left? 10. A study of ULXs has determined that very few X-ray sources with luminosity greater than 1040 erg s−1 remain after ~15 Myr a ...
... 8. Is there an X-ray candidate for an active galactic nucleus (AGN) in Arp 147? Explain. 9. Why might there not be new star formation in the elliptical galaxy on the left? 10. A study of ULXs has determined that very few X-ray sources with luminosity greater than 1040 erg s−1 remain after ~15 Myr a ...
Lecture Notes – Galaxies
... Clusters of Galaxies Contain from 10 – 1000s of galaxies, and are gravitationally bound systems. Spacing of galaxies is realtively close, ≈ 100 times diameter of galaxy. (For comparison, in our Galaxy the spacing of stars ≈ 106 diameter of a typical star.) Rich clusters (> 100 members) contain mostl ...
... Clusters of Galaxies Contain from 10 – 1000s of galaxies, and are gravitationally bound systems. Spacing of galaxies is realtively close, ≈ 100 times diameter of galaxy. (For comparison, in our Galaxy the spacing of stars ≈ 106 diameter of a typical star.) Rich clusters (> 100 members) contain mostl ...
Physics- HSC- Module 9.7 Astrophysics
... During the late 19th and early 20th centuries, astronomers obtained spectra and parallax distances for many stars, a powerful tool was discovered for classifying and understanding stars. Around 1911-13, Enjar Hertzsprung and Henry Norris Russell independently found that stars could be divided into t ...
... During the late 19th and early 20th centuries, astronomers obtained spectra and parallax distances for many stars, a powerful tool was discovered for classifying and understanding stars. Around 1911-13, Enjar Hertzsprung and Henry Norris Russell independently found that stars could be divided into t ...
Your Star: _____________________ d = 1 / p
... of some of the well-known stars to calculate, using the formulas and methods discussed in class, their intrinsic properties (temperature, luminosity, and radius.) We will then look for patterns in these properties by way of the H-R (temperature-luminosity) diagram. Your group will be in charge of a ...
... of some of the well-known stars to calculate, using the formulas and methods discussed in class, their intrinsic properties (temperature, luminosity, and radius.) We will then look for patterns in these properties by way of the H-R (temperature-luminosity) diagram. Your group will be in charge of a ...
31-2 - Fremont Peak Observatory
... minutes east of G-Scorpii is the globular cluster NGC -6441. NGC-6441 is an 8th magnitude globular about 35,000 light years from the earth. In a small telescope at low power or binoculars the G-Scorpii/NGC6441 pair looks like a double star. With a 6” or larger scope the true nature of NGC-6441 can b ...
... minutes east of G-Scorpii is the globular cluster NGC -6441. NGC-6441 is an 8th magnitude globular about 35,000 light years from the earth. In a small telescope at low power or binoculars the G-Scorpii/NGC6441 pair looks like a double star. With a 6” or larger scope the true nature of NGC-6441 can b ...
Dynamics of elliptical galaxies
... Recall that for an elliptical galaxy we can define an effective radius Re - radius of a circle which contains half of the total light in the galaxy. Measure three apparently independent properties; • The effective radius Re • The central velocity dispersion s • The surface brightness at the effectiv ...
... Recall that for an elliptical galaxy we can define an effective radius Re - radius of a circle which contains half of the total light in the galaxy. Measure three apparently independent properties; • The effective radius Re • The central velocity dispersion s • The surface brightness at the effectiv ...
Determining the Sizes of Stars Using the HR Diagram
... ● White Dwarfs: White dwarfs are the end states of stars less than around 6 times the mass of the Sun. The white dwarf is the core of the star that is left after episodes of mass loss causes the star to eject its outer layers, which continue expanding out into space to form a planetary nebulae. For ...
... ● White Dwarfs: White dwarfs are the end states of stars less than around 6 times the mass of the Sun. The white dwarf is the core of the star that is left after episodes of mass loss causes the star to eject its outer layers, which continue expanding out into space to form a planetary nebulae. For ...
Exercise 8
... How accurate were you? Is the criterion or criteria you used a good way to find galaxy distances? ...
... How accurate were you? Is the criterion or criteria you used a good way to find galaxy distances? ...
Galaxy Notes File
... which Mkn 205 is 14 times farther away at a distance of 1 billion light year. The very distant quasar is nearly as bright as the much closer galaxy. The extraordinary brightness of quasars, which is a blending of the term quasi-stellar radio source, indicates that some ...
... which Mkn 205 is 14 times farther away at a distance of 1 billion light year. The very distant quasar is nearly as bright as the much closer galaxy. The extraordinary brightness of quasars, which is a blending of the term quasi-stellar radio source, indicates that some ...
Distant Stars - How far away is it
... Remember the red and green light of the aurora borealis and the structure of molecules we discussed in our segment on the Heliosphere. The aurora is a good example of light being emitted as electrons change energy levels. But for our purposes here, we want to examine what happens when light from the ...
... Remember the red and green light of the aurora borealis and the structure of molecules we discussed in our segment on the Heliosphere. The aurora is a good example of light being emitted as electrons change energy levels. But for our purposes here, we want to examine what happens when light from the ...
Aries (constellation)
Aries is one of the constellations of the zodiac. It is located in the northern celestial hemisphere between Pisces to the west and Taurus to the east. The name Aries is Latin for ram, and its symbol is 20px (Unicode ♈), representing a ram's horns. It is one of the 48 constellations described by the 2nd century astronomer Ptolemy, and remains one of the 88 modern constellations. It is a mid-sized constellation, ranking 39th overall size, with an area of 441 square degrees (1.1% of the celestial sphere).Although Aries came to represent specifically the ram whose fleece became the Golden Fleece of Ancient Greek mythology, it has represented a ram since late Babylonian times. Before that, the stars of Aries formed a farmhand. Different cultures have incorporated the stars of Aries into different constellations including twin inspectors in China and a porpoise in the Marshall Islands. Aries is a relatively dim constellation, possessing only four bright stars: Hamal (Alpha Arietis, second magnitude), Sheratan (Beta Arietis, third magnitude), Mesarthim (Gamma Arietis, fourth magnitude), and 41 Arietis (also fourth magnitude). The few deep-sky objects within the constellation are quite faint and include several pairs of interacting galaxies. Several meteor showers appear to radiate from Aries, including the Daytime Arietids and the Epsilon Arietids.