Exercise 8
... emission line (the left arrow) — millimeters is a good unit to use. A simple way to measure this is simply to measure the length of the horizontal white arrow. Enter this information in the table on the next page. 13. Measure the distance D in millimeters between arrow d (which marks the helium emis ...
... emission line (the left arrow) — millimeters is a good unit to use. A simple way to measure this is simply to measure the length of the horizontal white arrow. Enter this information in the table on the next page. 13. Measure the distance D in millimeters between arrow d (which marks the helium emis ...
PDF Version - OMICS International
... Light Year (ly): is the distance that light travels in one year. One light year equals 9.46 x 1015 metres. c = distance/time 300000000 = distance/365x24x60x60 Stellar cluster: A number of stars that are held together in a group by a gravitational attraction.They were created at about the same time. ...
... Light Year (ly): is the distance that light travels in one year. One light year equals 9.46 x 1015 metres. c = distance/time 300000000 = distance/365x24x60x60 Stellar cluster: A number of stars that are held together in a group by a gravitational attraction.They were created at about the same time. ...
Our Universe
... •The fundamental descriptions of black holes are based on equations in the theory of general relativity developed by the German-born physicist Albert Einstein. The theory was published in 1916. •The surface of a black hole is known as the event horizon. This is not a normal surface that you could se ...
... •The fundamental descriptions of black holes are based on equations in the theory of general relativity developed by the German-born physicist Albert Einstein. The theory was published in 1916. •The surface of a black hole is known as the event horizon. This is not a normal surface that you could se ...
nasafinal - University of Oregon
... redshift (i.e. when they were young). In principle, these XUV structures are suggesting that galaxies can’t be as big as we think they are, when we observe them at high redshift. ...
... redshift (i.e. when they were young). In principle, these XUV structures are suggesting that galaxies can’t be as big as we think they are, when we observe them at high redshift. ...
The Hubble Mission - Indiana University Astronomy
... The period of pulsation of the Cepheids is related to their brightness, and allows a measurement of the distance – 108 million light years Observations like these tell us the Hubble Constant, the relation between the distances to galaxies and their recession velocities. A Hubble Constant of 70 km s- ...
... The period of pulsation of the Cepheids is related to their brightness, and allows a measurement of the distance – 108 million light years Observations like these tell us the Hubble Constant, the relation between the distances to galaxies and their recession velocities. A Hubble Constant of 70 km s- ...
Integrative Studies 410 Our Place in the Universe
... of digits used in quoted results • Do not count trailing or leading zeros • Examples: – 12.3 (3 sig figs) ...
... of digits used in quoted results • Do not count trailing or leading zeros • Examples: – 12.3 (3 sig figs) ...
- hcstonline.org
... understand stellar evolution? (A.3) 7. It is sometimes said that we are all made of star dust. Using your understanding of stellar evolution, explain this statement. (A.3) 8. How do scientists estimate the number of stars in our galaxy? (A4) 9. How do scientists estimate the number of galaxies in th ...
... understand stellar evolution? (A.3) 7. It is sometimes said that we are all made of star dust. Using your understanding of stellar evolution, explain this statement. (A.3) 8. How do scientists estimate the number of stars in our galaxy? (A4) 9. How do scientists estimate the number of galaxies in th ...
Galaxies – Island universes
... cluster. If they’re big enough to identify as having eaten several galaxies, we call them “central dominant” or “cannibal galaxies” … ...
... cluster. If they’re big enough to identify as having eaten several galaxies, we call them “central dominant” or “cannibal galaxies” … ...
High School Science Essential Curriculum - Astronomy
... The student will demonstrate the ability to use Earth’s characteristics as a model planet to compare and identify distinguishing features about other members of the solar system. ...
... The student will demonstrate the ability to use Earth’s characteristics as a model planet to compare and identify distinguishing features about other members of the solar system. ...
printer-friendly sample test questions
... D. Massive black holes are drawing galaxies away from Earth. 4. We know that nearly all galaxies are moving away from us because we A. watch them move across the sky, all in the same direction. B. see that their spectra are red-shifted relative to a rest position. C. observe a condensation trail beh ...
... D. Massive black holes are drawing galaxies away from Earth. 4. We know that nearly all galaxies are moving away from us because we A. watch them move across the sky, all in the same direction. B. see that their spectra are red-shifted relative to a rest position. C. observe a condensation trail beh ...
The Sun, Stars, and Beyond
... • If the Universe was infinitely wrapped up, then due to thermodynamics it would have been infinitely hot. • As it unwraps and flattens, it should cool to a specific temperature, based on known cooling processes. • Also, high temperatures would have emitted radiation, which would have changed freque ...
... • If the Universe was infinitely wrapped up, then due to thermodynamics it would have been infinitely hot. • As it unwraps and flattens, it should cool to a specific temperature, based on known cooling processes. • Also, high temperatures would have emitted radiation, which would have changed freque ...
PC2491 Examples 2
... (4) Estimate the mean free path of a star in a region where the stellar density is 1 star pc-3 and typical stellar velocities are 10 km s-1 (assume all stars 1Mo). In the same region hydrogen atoms have a density of 106 m-3. Assume the hydrogen atoms to be elastic spheres of radius 10-8 m and only i ...
... (4) Estimate the mean free path of a star in a region where the stellar density is 1 star pc-3 and typical stellar velocities are 10 km s-1 (assume all stars 1Mo). In the same region hydrogen atoms have a density of 106 m-3. Assume the hydrogen atoms to be elastic spheres of radius 10-8 m and only i ...
Type Ia supernovae and the ESSENCE supernova survey
... SN data combined with data from baryon acoustic oscillations (BAO) give M + = 1 at the 68 percent confidence level. ...
... SN data combined with data from baryon acoustic oscillations (BAO) give M + = 1 at the 68 percent confidence level. ...
states of matter
... ionized gas. A plasma is a very good conductor of electricity and is affected by magnetic fields. Plasmas, like gases • Plasma is the have an indefinite common state shape and an of matter indefinite volume. ...
... ionized gas. A plasma is a very good conductor of electricity and is affected by magnetic fields. Plasmas, like gases • Plasma is the have an indefinite common state shape and an of matter indefinite volume. ...
Passport to the Universe Educator`s Guide Text
... the Earth and the other planets in the larger scheme of things. From out here, the sizes of and distances between the Earth, Sun, and other planets appear relatively small. On our trip, we pass three of the eight planets—Mars, Jupiter (and its moons, Io and Europa), and Saturn. We now head out for ...
... the Earth and the other planets in the larger scheme of things. From out here, the sizes of and distances between the Earth, Sun, and other planets appear relatively small. On our trip, we pass three of the eight planets—Mars, Jupiter (and its moons, Io and Europa), and Saturn. We now head out for ...
Are we alone? - School of Physics
... would have had little effect. • In 2004, the same experiment would have devastating consequences (e.g., financial system collapses, no electricity, no water, no fuel, no public transport). • This process will accelerate. • There will come a point when the machines are in control. • We are becoming m ...
... would have had little effect. • In 2004, the same experiment would have devastating consequences (e.g., financial system collapses, no electricity, no water, no fuel, no public transport). • This process will accelerate. • There will come a point when the machines are in control. • We are becoming m ...
The IR Universe
... Spitzer has found optically invisible galaxies so distant that we see them as they were only 3 billion years after the Big Bang. These galaxies are obscured by silicate dust, suggesting that planets could have formed even at this early time in the history of the Universe. ...
... Spitzer has found optically invisible galaxies so distant that we see them as they were only 3 billion years after the Big Bang. These galaxies are obscured by silicate dust, suggesting that planets could have formed even at this early time in the history of the Universe. ...
1_Introduction
... Which of my assumptions is wrong? I assumed every star is visible from Earth. Since stars are opaque spheres, distant stars can hide behind nearby stars. ...
... Which of my assumptions is wrong? I assumed every star is visible from Earth. Since stars are opaque spheres, distant stars can hide behind nearby stars. ...
Black Hole
... We are made of Stars! After all the Hydrogen in the star was converted to Helium, for about a Million years other elements such as Carbon And others are cooked within the Star. The Supernova then throws them out in the Faraway Sky. Thus all the elements of which our Human Bodies are made were Cook ...
... We are made of Stars! After all the Hydrogen in the star was converted to Helium, for about a Million years other elements such as Carbon And others are cooked within the Star. The Supernova then throws them out in the Faraway Sky. Thus all the elements of which our Human Bodies are made were Cook ...
Kroupa - SatelliteGa.. - University of Hertfordshire
... colleague Dr Manuel Metz, now at the Deutsches Zentrum fuer Luft- and Raumfahrt, also worked on the study. “Fragments from early collisions can form the revolving dwarf galaxies we see today” comments Dr Metz. But he adds that this introduces a paradox. “Calculations suggest that the dwarf satellite ...
... colleague Dr Manuel Metz, now at the Deutsches Zentrum fuer Luft- and Raumfahrt, also worked on the study. “Fragments from early collisions can form the revolving dwarf galaxies we see today” comments Dr Metz. But he adds that this introduces a paradox. “Calculations suggest that the dwarf satellite ...
Lecture4 - University of Waterloo
... • The electrons of an atom occupy restricted regions around the nucleus – called shells, or orbitals, or energy levels. • Generally the electrons occupy the lowest possible orbital/energy level but they will sometimes change to a higher level if they gain enough energy from an incoming photon. • The ...
... • The electrons of an atom occupy restricted regions around the nucleus – called shells, or orbitals, or energy levels. • Generally the electrons occupy the lowest possible orbital/energy level but they will sometimes change to a higher level if they gain enough energy from an incoming photon. • The ...
The Genesis of the Elements
... It has the lowest mass per nuclear particle of any element It can not fuse into another element without creating mass ...
... It has the lowest mass per nuclear particle of any element It can not fuse into another element without creating mass ...