Feb 2017 - What`s Out Tonight?
... tens of thousands stars held together by their mutual gravity. All Galilean moons and cloud bands, easily visible at 50x. It is posof the globulars that can be seen in the sky are part of our Milky sible to see the moons with well-focused binoculars. Saturn is Way Galaxy, and there are about 200 of ...
... tens of thousands stars held together by their mutual gravity. All Galilean moons and cloud bands, easily visible at 50x. It is posof the globulars that can be seen in the sky are part of our Milky sible to see the moons with well-focused binoculars. Saturn is Way Galaxy, and there are about 200 of ...
MASSACHUSETTS INSTITUTE OF TECHNOLOGY Problem Set 1
... "Accuracy of Parallax Measurements of Stars"" The uncertainties in the parallax measurements of stars made in the optical with the Hipparchos satellite were typically 0.001�� (0.001 arc seconds). How far out into space can we measure stellar distances with ∼ 10% accuracy? Radio astronomers are devel ...
... "Accuracy of Parallax Measurements of Stars"" The uncertainties in the parallax measurements of stars made in the optical with the Hipparchos satellite were typically 0.001�� (0.001 arc seconds). How far out into space can we measure stellar distances with ∼ 10% accuracy? Radio astronomers are devel ...
Distances to the Hyades Cluster
... To find the distance to the Hyades star cluster using the convergent point method; to recognize the uncertainties in using this method; to summarize the significant results obtained by the Hipparchos satellite and what these results mean for the distance scale of the Universe. Background and Theory ...
... To find the distance to the Hyades star cluster using the convergent point method; to recognize the uncertainties in using this method; to summarize the significant results obtained by the Hipparchos satellite and what these results mean for the distance scale of the Universe. Background and Theory ...
Chapter 28 – Stars and Galaxies
... larger star would be more luminous If the same size, hotter one would be brighter Types of magnitude Absolute – as if all stars were same distance from earth Apparent – as they appear in the nighttime sky ...
... larger star would be more luminous If the same size, hotter one would be brighter Types of magnitude Absolute – as if all stars were same distance from earth Apparent – as they appear in the nighttime sky ...
Standard EPS Shell Presentation
... Identify the conditions necessary for fusion to occur inside a star. Describe the information that spectroscopy provides about stars. Relate the color of a star to its temperature. Explain the factors that determine the brightness of a star in the sky. Discuss the importance of the H-R diagram to as ...
... Identify the conditions necessary for fusion to occur inside a star. Describe the information that spectroscopy provides about stars. Relate the color of a star to its temperature. Explain the factors that determine the brightness of a star in the sky. Discuss the importance of the H-R diagram to as ...
Mar 2017 - What`s Out Tonight?
... tens of thousands stars held together by their mutual gravity. All Galilean moons and cloud bands, easily visible at 50x. It is posof the globulars that can be seen in the sky are part of our Milky sible to see the moons with well-focused binoculars. Saturn is Way Galaxy, and there are about 200 of ...
... tens of thousands stars held together by their mutual gravity. All Galilean moons and cloud bands, easily visible at 50x. It is posof the globulars that can be seen in the sky are part of our Milky sible to see the moons with well-focused binoculars. Saturn is Way Galaxy, and there are about 200 of ...
Astronomy 20 Homework # 2
... Handed out on October 8, 2004 Due in class on Friday, October 15, 2004 1. What are the apparent bolometric magnitudes of: (a) a Sun-like star 50 pc away? (b) a 100 Watt lightbulb 10 km away? (c) a galaxy containing ∼ 3 × 1010 stars of an average luminosity ∼ 0.5L⊙ 20 Mpc away? (d) A quasar with lumi ...
... Handed out on October 8, 2004 Due in class on Friday, October 15, 2004 1. What are the apparent bolometric magnitudes of: (a) a Sun-like star 50 pc away? (b) a 100 Watt lightbulb 10 km away? (c) a galaxy containing ∼ 3 × 1010 stars of an average luminosity ∼ 0.5L⊙ 20 Mpc away? (d) A quasar with lumi ...
Stellar Evolution and the HR Diagram Study Guide
... The absolute magnitude is a measurement that allows scientists to compare the true brightness of stars. ...
... The absolute magnitude is a measurement that allows scientists to compare the true brightness of stars. ...
Black Holes and Cosmic Roles: Understanding the Center of the
... • Astronomical Unit: A length measurement used in astronomy which is equal to the average distance between the Earth and the Sun or about 92, 955, 807.3miles (149, 597, 870.7kilometers). • Spacetime: The coupling of time and the three spatial dimensions with time acting as the fourth dimension. • Gr ...
... • Astronomical Unit: A length measurement used in astronomy which is equal to the average distance between the Earth and the Sun or about 92, 955, 807.3miles (149, 597, 870.7kilometers). • Spacetime: The coupling of time and the three spatial dimensions with time acting as the fourth dimension. • Gr ...
INV 12B MOTION WITH CHANGING SPEED DRY LAB DATA
... ASTRONOMY REVIEW 1. Earth 2. nebula 3. meteor 4. gravity 5. cosmic background radiation 6. outgassing 7. Doppler effect 8. Milky Way 9. light year 10. nova ______ 11. neutron star 12. main sequence star 13. black hole 14. parallax 15. irregular galaxy 16. elliptical galaxy 17. Mercury 18. protostar ...
... ASTRONOMY REVIEW 1. Earth 2. nebula 3. meteor 4. gravity 5. cosmic background radiation 6. outgassing 7. Doppler effect 8. Milky Way 9. light year 10. nova ______ 11. neutron star 12. main sequence star 13. black hole 14. parallax 15. irregular galaxy 16. elliptical galaxy 17. Mercury 18. protostar ...
The Milky Way Galaxy
... Clouds of gas and dust block our view so it is hard to see beyond our local region ...
... Clouds of gas and dust block our view so it is hard to see beyond our local region ...
Support worksheet – Topic 3 Questions
... double the distance from Earth to star Y. Calculate the ratio of luminosities X . LY ...
... double the distance from Earth to star Y. Calculate the ratio of luminosities X . LY ...
PHYS 175 Fall 2014 Final Recitation Ch. 16 The Sun
... time are both aspects of a single spacetime, and the perception of that spacetime is dependent upon the observer’s frame of reference. While special relativity only takes into account relative motion (not gravity), it correctly predicts many observed distortions of mass, length and time. Ch. 22 The ...
... time are both aspects of a single spacetime, and the perception of that spacetime is dependent upon the observer’s frame of reference. While special relativity only takes into account relative motion (not gravity), it correctly predicts many observed distortions of mass, length and time. Ch. 22 The ...
Distances farther out
... MKK classification Luminosity (M) directly from spectrum. Hence find D. Eg. 39 Cancri : Class K0 III => Mv = +0.5. & V = 6.4 = m log(D) = 2.2 => 150 pc away But !! Giant stars have spread about average --- , If 39 Cnc is as bright as Uma (ie Mv = -0.3), then it would be 50 % farther away. In ...
... MKK classification Luminosity (M) directly from spectrum. Hence find D. Eg. 39 Cancri : Class K0 III => Mv = +0.5. & V = 6.4 = m log(D) = 2.2 => 150 pc away But !! Giant stars have spread about average --- , If 39 Cnc is as bright as Uma (ie Mv = -0.3), then it would be 50 % farther away. In ...
ppt
... Emmanuel Kant (1755) suggested instead that the MW is a giant disk of stars. Kant also hypothesized that space was full of other, similar disks of stars (island universes). ...
... Emmanuel Kant (1755) suggested instead that the MW is a giant disk of stars. Kant also hypothesized that space was full of other, similar disks of stars (island universes). ...
The Bigger Picture
... • Even the largest parallax (that for the nearest star) is small. The atmosphere blurs stellar images to about 1 arcsecond so `astrometrists’ are trying to measure a tiny motion of the centroid as it moves back and forth every six months. The lack of parallax apparent to the unaided eye was used as ...
... • Even the largest parallax (that for the nearest star) is small. The atmosphere blurs stellar images to about 1 arcsecond so `astrometrists’ are trying to measure a tiny motion of the centroid as it moves back and forth every six months. The lack of parallax apparent to the unaided eye was used as ...
Facilitator`s Guide
... “The nearest galaxy to our Milky Way is Andromeda, 2.7 million light years away.” Or that “The Universe is 13.7 billion years old!” The more astute student wants to know, “How do they know that?” This course is intended to help answer that question. There are many “measuring sticks” that are used to ...
... “The nearest galaxy to our Milky Way is Andromeda, 2.7 million light years away.” Or that “The Universe is 13.7 billion years old!” The more astute student wants to know, “How do they know that?” This course is intended to help answer that question. There are many “measuring sticks” that are used to ...
Chap 11 Characterizing Stars v2
... periodic shift of its spectral lines. This shift is caused by the Doppler effect as the orbits of the stars carry them alternately toward and away from Earth. An eclipsing binary is a system whose orbits are viewed nearly edge-on from Earth, so that one star periodically eclipses the other. Detailed ...
... periodic shift of its spectral lines. This shift is caused by the Doppler effect as the orbits of the stars carry them alternately toward and away from Earth. An eclipsing binary is a system whose orbits are viewed nearly edge-on from Earth, so that one star periodically eclipses the other. Detailed ...
Chapter 01
... New distance scale: 1 light year (ly) = Distance traveled by light in 1 year = 63,000 AU = 1013 km ...
... New distance scale: 1 light year (ly) = Distance traveled by light in 1 year = 63,000 AU = 1013 km ...
Chapter 15 part 1
... Our next nearest neighbor to the Sun beyond the Alpha Centauri system is called Barnard’s Star. Its parallax is 0.55'', so it lies at a distance of 1.8 pc, or 6.0 light-years. ...
... Our next nearest neighbor to the Sun beyond the Alpha Centauri system is called Barnard’s Star. Its parallax is 0.55'', so it lies at a distance of 1.8 pc, or 6.0 light-years. ...
Handout from Allaire Star Party
... One of the nebulae visible in the fall is the Eagle Nebula, M16, in the constellation Serpens. M16 is 7,000 light years away and has 3 huge “pillars” of dark dust that are silhouetted against the nebula in the background. One of the most famous Hubble images depicts these “Pillars of Creation” and s ...
... One of the nebulae visible in the fall is the Eagle Nebula, M16, in the constellation Serpens. M16 is 7,000 light years away and has 3 huge “pillars” of dark dust that are silhouetted against the nebula in the background. One of the most famous Hubble images depicts these “Pillars of Creation” and s ...
The Milky Way - Department of Physics
... New distance scale: 1 light year (ly) = Distance traveled by light in 1 year = 63,000 AU = 1013 km ...
... New distance scale: 1 light year (ly) = Distance traveled by light in 1 year = 63,000 AU = 1013 km ...
Cosmic distance ladder
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A real direct distance measurement of an astronomical object is possible only for those objects that are ""close enough"" (within about a thousand parsecs) to Earth. The techniques for determining distances to more distant objects are all based on various measured correlations between methods that work at close distances and methods that work at larger distances. Several methods rely on a standard candle, which is an astronomical object that has a known luminosity.The ladder analogy arises because no one technique can measure distances at all ranges encountered in astronomy. Instead, one method can be used to measure nearby distances, a second can be used to measure nearby to intermediate distances, and so on. Each rung of the ladder provides information that can be used to determine the distances at the next higher rung.