Lecture 5
... recent years, astronomers have developed several very reliable and independent methods of determining the distances to the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC), two of the nearby satellite galaxies of our own Milky Way Galaxy. Since the LMC and SMC contain large number of Ce ...
... recent years, astronomers have developed several very reliable and independent methods of determining the distances to the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC), two of the nearby satellite galaxies of our own Milky Way Galaxy. Since the LMC and SMC contain large number of Ce ...
MasteringPhysics: Assignmen
... In other words, it would be possible for the earth to orbit the black hole at the same distance that it is from the sun without falling into the event horizon. However, since the black hole is much more massive than the sun, the speed of the earth's orbit would be incredibly high. In fact, if our su ...
... In other words, it would be possible for the earth to orbit the black hole at the same distance that it is from the sun without falling into the event horizon. However, since the black hole is much more massive than the sun, the speed of the earth's orbit would be incredibly high. In fact, if our su ...
The Milky Way - Chandra X
... diameter. The dark halo extends to a diameter of at least 600,000 light years. (Illustration: CXC/M.Weiss) ...
... diameter. The dark halo extends to a diameter of at least 600,000 light years. (Illustration: CXC/M.Weiss) ...
Slide 1
... recent years, astronomers have developed several very reliable and independent methods of determining the distances to the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC), two of the nearby satellite galaxies of our own Milky Way Galaxy. Since the LMC and SMC contain large number of Ce ...
... recent years, astronomers have developed several very reliable and independent methods of determining the distances to the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC), two of the nearby satellite galaxies of our own Milky Way Galaxy. Since the LMC and SMC contain large number of Ce ...
The Milky Way - Chandra X
... diameter. The dark halo extends to a diameter of at least 600,000 light years. (Illustration: CXC/M.Weiss) ...
... diameter. The dark halo extends to a diameter of at least 600,000 light years. (Illustration: CXC/M.Weiss) ...
Three of his best known contributions
...
* A Relation Between Distance and Radial Velocity
Among Extra-Galactic Nebulae (1929, Edwin Hubble)
* V = H * d ( V : radial velocity, d : distance of galaxy)
(H : Hubble Constant)
745km/s for a distnace of 1.4Mpc
=> ~500km/s/Mpc
...
...
math help sheet - Lawrence University
... elliptical orbits about the Sun (Kepler’s First Law, or KI), that they sped up when they approached the Sun (KII), and that planet’s farther from the Sun moved more slowly than planets closer to the Sun (KIII). Kepler’s Third Law, sometimes called the Harmonic Law can be written as P2 = a3, Where P ...
... elliptical orbits about the Sun (Kepler’s First Law, or KI), that they sped up when they approached the Sun (KII), and that planet’s farther from the Sun moved more slowly than planets closer to the Sun (KIII). Kepler’s Third Law, sometimes called the Harmonic Law can be written as P2 = a3, Where P ...
Stars
... Stars are large bodies of plasma held together by gravity The Hurtzsprung-Russel relates brightness to temperature of stars There are three main classifications of stars There are three models for the origin of the universe, the leading model is the big ...
... Stars are large bodies of plasma held together by gravity The Hurtzsprung-Russel relates brightness to temperature of stars There are three main classifications of stars There are three models for the origin of the universe, the leading model is the big ...
18 are exactly the same ones as for galactic star clusters of early
... stars probably belong to the field, but one may ask whether some correspond to a very much older generation of stars. This observation seems to support Herbig's (1962) proposal of a spread in ages within one cluster. It is planned to extend work on NGC 6067 and also to study a neighbouring field in ...
... stars probably belong to the field, but one may ask whether some correspond to a very much older generation of stars. This observation seems to support Herbig's (1962) proposal of a spread in ages within one cluster. It is planned to extend work on NGC 6067 and also to study a neighbouring field in ...
Lecture 17 Review
... Thus, remote clusters appear dimmer and redder than expected from their distance and age. Interstellar extinction - When enough gas and dust is in the way, far away objects cannot be seen because light is scattered out of the line of sight. Thus, we cannot see the galactic center with visible light. ...
... Thus, remote clusters appear dimmer and redder than expected from their distance and age. Interstellar extinction - When enough gas and dust is in the way, far away objects cannot be seen because light is scattered out of the line of sight. Thus, we cannot see the galactic center with visible light. ...
Two-Gyro Performance, Scheduling and Acquisitions
... – This problem was identified by the OTA SEs in some follow-on analysis of the previous problem’s test results. However, the cause of this problem is different. – Problem only occurs with Target-ReAcq style Acqs/ReAcqs where both PASS and the onboard ReAcq process are effectively accounting for a po ...
... – This problem was identified by the OTA SEs in some follow-on analysis of the previous problem’s test results. However, the cause of this problem is different. – Problem only occurs with Target-ReAcq style Acqs/ReAcqs where both PASS and the onboard ReAcq process are effectively accounting for a po ...
Masses are much harder than distance, luminosity, or temperature
... • Range of different mass stars! ...
... • Range of different mass stars! ...
MEASURING THE STARS
... on the x-‐axis – Luminosity on the y-‐axis • Such a plot is called the H-‐R diagram • H & R discovered that the stars were not randomly distributed in the H-‐R ...
... on the x-‐axis – Luminosity on the y-‐axis • Such a plot is called the H-‐R diagram • H & R discovered that the stars were not randomly distributed in the H-‐R ...
CBradleyLoutl
... -H I zones, containing neutral hydrogen, with a temperature often around 100K -H II zones, containing ionized hydrogen, with a temperature often around 10,000K. The clouds absorb ultraviolet light and retransmitted it as visible/IR light. These clouds are visible as nebulae. Density in these nebulae ...
... -H I zones, containing neutral hydrogen, with a temperature often around 100K -H II zones, containing ionized hydrogen, with a temperature often around 10,000K. The clouds absorb ultraviolet light and retransmitted it as visible/IR light. These clouds are visible as nebulae. Density in these nebulae ...
math help sheet - Lawrence University
... elliptical orbits about the Sun (Kepler’s First Law, or KI), that they sped up when they approached the Sun (KII), and that planet’s farther from the Sun moved more slowly than planets closer to the Sun (KIII). Kepler’s Third Law, sometimes called the Harmonic Law can be written as P2 = a3, Where P ...
... elliptical orbits about the Sun (Kepler’s First Law, or KI), that they sped up when they approached the Sun (KII), and that planet’s farther from the Sun moved more slowly than planets closer to the Sun (KIII). Kepler’s Third Law, sometimes called the Harmonic Law can be written as P2 = a3, Where P ...
TA`s solution set
... old. Describe what evidence you could provide that would convince Fred that the universe cannot be static, infinitely large, and eternally old. (Remember, skeptical Fred prefers evidence that he can see directly with his own eyes.) The most readily available evidence that we do not live in a static, ...
... old. Describe what evidence you could provide that would convince Fred that the universe cannot be static, infinitely large, and eternally old. (Remember, skeptical Fred prefers evidence that he can see directly with his own eyes.) The most readily available evidence that we do not live in a static, ...
GR Cosmology: The Robertson
... spatial separation between them at equal cosmic time simply inflates with the scale factor S (t ) , giving the Hubble flow (below). From the point of view of large-scale cosmology, the remaining problem is how S (t ) varies with time. Our Particle Horizon How much of the Universe today could have in ...
... spatial separation between them at equal cosmic time simply inflates with the scale factor S (t ) , giving the Hubble flow (below). From the point of view of large-scale cosmology, the remaining problem is how S (t ) varies with time. Our Particle Horizon How much of the Universe today could have in ...
Measuring Stars` Properties - Test 1 Study Guide
... • In 1900 only 60 stars had parallax measurements • 1997-2000 a European satellite Hipparcos released parallax measurements for more than 2,300,000 stars up to 500 LY distance • 118,000 stars measured with .001 arc-second resolution and 0.2% error on light intensity • OLD(1990): 100 stars with d ...
... • In 1900 only 60 stars had parallax measurements • 1997-2000 a European satellite Hipparcos released parallax measurements for more than 2,300,000 stars up to 500 LY distance • 118,000 stars measured with .001 arc-second resolution and 0.2% error on light intensity • OLD(1990): 100 stars with d ...
exercise 1 - basic phys, chem
... Ions therefore have an overall non-zero electrical charge and are thus more reactive in general than atoms. The overall charge is written as a superscript to the right of the element symbol, so, for instance, a calcium ion that has two fewer electrons than protons would be written: Ca2+. Confusingl ...
... Ions therefore have an overall non-zero electrical charge and are thus more reactive in general than atoms. The overall charge is written as a superscript to the right of the element symbol, so, for instance, a calcium ion that has two fewer electrons than protons would be written: Ca2+. Confusingl ...
Exercise 1
... Ions therefore have an overall non-zero electrical charge and are thus more reactive in general than atoms. The overall charge is written as a superscript to the right of the element symbol, so, for instance, a calcium ion that has two fewer electrons than protons would be written: Ca2+. Confusingly ...
... Ions therefore have an overall non-zero electrical charge and are thus more reactive in general than atoms. The overall charge is written as a superscript to the right of the element symbol, so, for instance, a calcium ion that has two fewer electrons than protons would be written: Ca2+. Confusingly ...
Spectroscopy – the study of the colors of light (the spectrum) given
... diagram astronomers must first find the star’s surface temperature. This can be done using a Plank curve or the spectrum. ...
... diagram astronomers must first find the star’s surface temperature. This can be done using a Plank curve or the spectrum. ...
The Nature of Light II
... move up to a higher lever and an absorption line left. Once an electron in a higher lever falls down to a lower one, it emits a photon that carries exactly the amount of energy equal to the difference in energy between the starting level and the ending one. Try the PhET Interactive Simulations to in ...
... move up to a higher lever and an absorption line left. Once an electron in a higher lever falls down to a lower one, it emits a photon that carries exactly the amount of energy equal to the difference in energy between the starting level and the ending one. Try the PhET Interactive Simulations to in ...
Weighing a galaxy
... artificial satellites orbiting the Earth will shrink their orbit and eventually burn up if they are moving too slowly, or are slowed down by the Earth’s atmosphere. If in a stable circular orbit, centripetal force mv2/r needs to be balanced by gravitational force GMm/r2, where m is the mass of the o ...
... artificial satellites orbiting the Earth will shrink their orbit and eventually burn up if they are moving too slowly, or are slowed down by the Earth’s atmosphere. If in a stable circular orbit, centripetal force mv2/r needs to be balanced by gravitational force GMm/r2, where m is the mass of the o ...
Chapter 3a powerpoint presentation
... The Astronomical Unit (AU) is the distance between the Earth and the Sun, 1 AU = 1.496 x 1011 m Which is perhaps more familiar to you as 93 million miles. Nick Devereux 2006 ...
... The Astronomical Unit (AU) is the distance between the Earth and the Sun, 1 AU = 1.496 x 1011 m Which is perhaps more familiar to you as 93 million miles. Nick Devereux 2006 ...
Scattering (and the blue sky)
... Blue light is scattered by dust more efficiently than red light, so dust seen in scattered light looks bluish. ...
... Blue light is scattered by dust more efficiently than red light, so dust seen in scattered light looks bluish. ...
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.