Reflecting telescopes - School
... From this we can see that the wavelength is apparently shortened when object and observer are getting closer together. Binary Systems In these systems two stars orbit about their common centre of mass. If it is possible to observe them in their plane of orbit the Doppler shift from each star will ch ...
... From this we can see that the wavelength is apparently shortened when object and observer are getting closer together. Binary Systems In these systems two stars orbit about their common centre of mass. If it is possible to observe them in their plane of orbit the Doppler shift from each star will ch ...
The Milky Way, Schroedinger`s Cat, and You
... The Hubble Space Telescope is in orbit above the Earth’s atmosphere and so is able to take sharp pictures……but….. ….. it is prohibitively expensive to build telescopes that are based in space A new method called “Adaptive Optics” allows us to sharpen the vision of telescopes that are on the ground, ...
... The Hubble Space Telescope is in orbit above the Earth’s atmosphere and so is able to take sharp pictures……but….. ….. it is prohibitively expensive to build telescopes that are based in space A new method called “Adaptive Optics” allows us to sharpen the vision of telescopes that are on the ground, ...
Origin and Nature of Planetary Systems
... We have laid out balls and beads to represent the planets of the Solar System. We have laid out macramé strings and twine to represent the solar distances of the planets of our Solar System (plus Pluto) and the distances of the seven other planetary systems listed below. The scale for these planetar ...
... We have laid out balls and beads to represent the planets of the Solar System. We have laid out macramé strings and twine to represent the solar distances of the planets of our Solar System (plus Pluto) and the distances of the seven other planetary systems listed below. The scale for these planetar ...
General Introduction 1. Luminosity, Flux and Magnitude The
... Nucleosynthesis is the natural by-product of stellar evolution. The most bound nucleus is Fe, and slowly nuclear reactions in stars strive toward nuclei with the greatest binding. For the most part, however, the heavy elements produced in stars are trapped within unless the star can be disrupted. Lo ...
... Nucleosynthesis is the natural by-product of stellar evolution. The most bound nucleus is Fe, and slowly nuclear reactions in stars strive toward nuclei with the greatest binding. For the most part, however, the heavy elements produced in stars are trapped within unless the star can be disrupted. Lo ...
THE ABSOLUTE MAGNITUDE OF RR LYRAE - Cosmos
... from Hipparcos parallaxes (MVH = V + 5 + 5 log H ) of each star with positive parallax as a function of the photometric distance rpe . Such a tendency that stars with larger relative errors have brighter luminosities, i.e., have smaller parallaxes, appears clearly when the true parallax is small, c ...
... from Hipparcos parallaxes (MVH = V + 5 + 5 log H ) of each star with positive parallax as a function of the photometric distance rpe . Such a tendency that stars with larger relative errors have brighter luminosities, i.e., have smaller parallaxes, appears clearly when the true parallax is small, c ...
Lecture 17: General Relativity and Black Holes
... (d) observing globular star clusters (e) finding the distances to the spiral arms. 4. Shapley was able to determine the distance to a globular star cluster by identifying and studying each cluster's (a) RR Lyrae stars (b) Population I stars (c) eclipsing binaries (d) spectroscopic binaries (e) gas a ...
... (d) observing globular star clusters (e) finding the distances to the spiral arms. 4. Shapley was able to determine the distance to a globular star cluster by identifying and studying each cluster's (a) RR Lyrae stars (b) Population I stars (c) eclipsing binaries (d) spectroscopic binaries (e) gas a ...
FREQUENTLY ASKED QUESTIONS Content Questions
... or didn’t happen to learn something previously, let me know. Can you explain the uncertainty problem? Problem 1-16 asked for the uncertainty on the time for the pulsar to rotate 1 million times. The uncertainty on the time T to rotate once (i.e., the period) is δ = 0.00000000000003 ms (the ±3 refers ...
... or didn’t happen to learn something previously, let me know. Can you explain the uncertainty problem? Problem 1-16 asked for the uncertainty on the time for the pulsar to rotate 1 million times. The uncertainty on the time T to rotate once (i.e., the period) is δ = 0.00000000000003 ms (the ±3 refers ...
Introduction to Astrophysics, Lecture 13
... giant system of stars. It contains around a hundred thousand million (i.e. 1011) stars, including our own. The galaxy seen in the far infra-red. ...
... giant system of stars. It contains around a hundred thousand million (i.e. 1011) stars, including our own. The galaxy seen in the far infra-red. ...
Properties of Stars
... Sometimes the orbital plane is lined up so that the stars pass in front of each other as seen from the Earth. Each eclipse will cause the total light from the system to decrease. The amount of the decrease will depend on how much of each star is covered up (they can have different sizes) and on the ...
... Sometimes the orbital plane is lined up so that the stars pass in front of each other as seen from the Earth. Each eclipse will cause the total light from the system to decrease. The amount of the decrease will depend on how much of each star is covered up (they can have different sizes) and on the ...
"Star Tracks", Leaflet for Royal Society Summer Exhibition
... discover how the Milky Way works as a machine and how it was assembled. The Milky Way is not special. In fact, there are at least billions of galaxies in the Universe very similar to our own. However, we are in the fortunate position of being able to observe our Galaxy in exquisite detail. Gaia will ...
... discover how the Milky Way works as a machine and how it was assembled. The Milky Way is not special. In fact, there are at least billions of galaxies in the Universe very similar to our own. However, we are in the fortunate position of being able to observe our Galaxy in exquisite detail. Gaia will ...
The Characteristics of Stars
... give off more energy and those that give off less energy. To overcome this problem, astronomers have developed an absolute magnitude scale. The absolute magnitude of a celestial object equals the apparent magnitude the object would have if it were 33 ly from the observer. If the Sun were 33 ly from ...
... give off more energy and those that give off less energy. To overcome this problem, astronomers have developed an absolute magnitude scale. The absolute magnitude of a celestial object equals the apparent magnitude the object would have if it were 33 ly from the observer. If the Sun were 33 ly from ...
Lecture 12: Galaxies View of the Galaxy from within Comparison to
... • It has a disk about 25 kpc (80,000 ly) in radius and about 600 pc thick, with interstellar dust and gas strongly concentrated in the disk plane. • The Sun orbits around the Galactic centre at a speed of about 220 km s-1. • It takes about 220 million years to complete one orbit ...
... • It has a disk about 25 kpc (80,000 ly) in radius and about 600 pc thick, with interstellar dust and gas strongly concentrated in the disk plane. • The Sun orbits around the Galactic centre at a speed of about 220 km s-1. • It takes about 220 million years to complete one orbit ...
Determination of spiral orbits with constant tangential velocity
... Comparing the observed orbital velocities of stars in galaxies with the calculations using Newton's laws of gravity, one comes across a surprising contradiction. The Newtonian equations of motion show that the stars that are located far away from the center have to move more slowly than those locate ...
... Comparing the observed orbital velocities of stars in galaxies with the calculations using Newton's laws of gravity, one comes across a surprising contradiction. The Newtonian equations of motion show that the stars that are located far away from the center have to move more slowly than those locate ...
Stellar Dynamics
... cluster may be several Mpc in size and contain thousands of galaxies. The nearest known cluster is the Virgo Cluster, located 15 to 20 Mpc from us, and containing about 1300 catalogued members. Groups are less dense entities and contain smaller number of galaxies. Our Galaxy, the Milky Way, is a mem ...
... cluster may be several Mpc in size and contain thousands of galaxies. The nearest known cluster is the Virgo Cluster, located 15 to 20 Mpc from us, and containing about 1300 catalogued members. Groups are less dense entities and contain smaller number of galaxies. Our Galaxy, the Milky Way, is a mem ...
Final Exam: Chs 4-5, 12-17
... b. compression waves passing through interstellar clouds in the arms of spiral galaxies c. compression of a hot interstellar gas cloud by its own gravity d. compression of a cold part of a large interstellar cloud by another part which contains a group of hot, young, massive stars ____ 44. The rotat ...
... b. compression waves passing through interstellar clouds in the arms of spiral galaxies c. compression of a hot interstellar gas cloud by its own gravity d. compression of a cold part of a large interstellar cloud by another part which contains a group of hot, young, massive stars ____ 44. The rotat ...
EM Spectrum notes - Biloxi Public Schools
... cannot see the spiral shape of the Milky Way Galaxy from Earth because we are located within one of its spiral arms ...
... cannot see the spiral shape of the Milky Way Galaxy from Earth because we are located within one of its spiral arms ...
Neutron Stars - Otterbein University
... • A shock wave travels through the star and blows off the outer layers, including the heavy elements – a supernova • A million times brighter than a nova!! • The actual explosion takes less than a second ...
... • A shock wave travels through the star and blows off the outer layers, including the heavy elements – a supernova • A million times brighter than a nova!! • The actual explosion takes less than a second ...
Scientific Results Summary
... A lot of telescope time at Subaru is dedicated to looking at stars to assess their different stages of formation and evolution. Scientists at Subaru have pierced through a dusty stellar nursery of a Class O protostar located 500 light years away and captured the earliest and most detailed view of a ...
... A lot of telescope time at Subaru is dedicated to looking at stars to assess their different stages of formation and evolution. Scientists at Subaru have pierced through a dusty stellar nursery of a Class O protostar located 500 light years away and captured the earliest and most detailed view of a ...
Constellations - Sierra Star Gazers
... Just rising over the northeastern horizon is the constellation Perseus. Between Perseus and Cassiopeia is found one the most interesting objects to be seen through a small to medium aperture scope. The best thing is that it so easy to locate. NGC 869 & 884, popularly known as the Double Cluster, are ...
... Just rising over the northeastern horizon is the constellation Perseus. Between Perseus and Cassiopeia is found one the most interesting objects to be seen through a small to medium aperture scope. The best thing is that it so easy to locate. NGC 869 & 884, popularly known as the Double Cluster, are ...
CELT Review: 1,2 May 2002 Session 1
... glimpsing the tip of the iceberg with the first galaxies identified beyond z=1 •Understanding the details of the formation and assembly epoch for galaxies will be a major area in astronomy and astrophysics for the next few decades. The light grasp and spatial resolution of a 30m telescope is essenti ...
... glimpsing the tip of the iceberg with the first galaxies identified beyond z=1 •Understanding the details of the formation and assembly epoch for galaxies will be a major area in astronomy and astrophysics for the next few decades. The light grasp and spatial resolution of a 30m telescope is essenti ...
Constellations and Asterisms
... the shapes of microscopes and telescopes. As you can probably infer, these sets are so drastically different in shape from each other reflecting who was looking up into the sky. The early constellations were most likely seen by the naked eye by cultures wanting to see these creatures mapped in the s ...
... the shapes of microscopes and telescopes. As you can probably infer, these sets are so drastically different in shape from each other reflecting who was looking up into the sky. The early constellations were most likely seen by the naked eye by cultures wanting to see these creatures mapped in the s ...
Scientific Notation Worksheet
... Distances are so great in space that a special unit of measurement is used. It is called a light-year. This sounds like a measurement of time, but it is a unit used to measure distance. By definition a light-year is the distance that light travels in one year. To calculate the distance of one light- ...
... Distances are so great in space that a special unit of measurement is used. It is called a light-year. This sounds like a measurement of time, but it is a unit used to measure distance. By definition a light-year is the distance that light travels in one year. To calculate the distance of one light- ...
The Universe and Big Bang Theory Review Sheet
... 5. What does the red shift suggest? - It suggests the universe is expanding. 6. The farther the galaxy is from earth, the greater the red shift. 7. From where do stars originate from? -from clouds of gas and dust clouds. 8. How does gravity play a role in the forming of stars? - gravity causes the g ...
... 5. What does the red shift suggest? - It suggests the universe is expanding. 6. The farther the galaxy is from earth, the greater the red shift. 7. From where do stars originate from? -from clouds of gas and dust clouds. 8. How does gravity play a role in the forming of stars? - gravity causes the g ...
Document
... Strategies to Explore the Structure of Our Milky Way I. Select bright objects that you can see throughout the Milky Way and trace their directions and distances II. Observe objects at wavelengths other than visible (to eliminate problems caused by dust, gas, other galactic bodies, etc), and catalog ...
... Strategies to Explore the Structure of Our Milky Way I. Select bright objects that you can see throughout the Milky Way and trace their directions and distances II. Observe objects at wavelengths other than visible (to eliminate problems caused by dust, gas, other galactic bodies, etc), and catalog ...
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.