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Milky Way inner halo reveals its age | COSMOS magazine
... halo region to date is 13.5 billion years old. White dwarf stars form when normal stars like the sun have burnt up all their fuel and lost their outer layers. The centre of the star becomes white hot before cooling over many years. “White dwarfs are remarkable objects,” said Kalirai. “They contain a ...
... halo region to date is 13.5 billion years old. White dwarf stars form when normal stars like the sun have burnt up all their fuel and lost their outer layers. The centre of the star becomes white hot before cooling over many years. “White dwarfs are remarkable objects,” said Kalirai. “They contain a ...
Document
... space when they are shielded by dense, dark, giant clouds containing dust • These giant clouds are interesting structures that provide the raw material for stellar birth ...
... space when they are shielded by dense, dark, giant clouds containing dust • These giant clouds are interesting structures that provide the raw material for stellar birth ...
Fate of Stars
... White Dwarves Mass vs Radius • In WD, gravity is balanced by pressure due to degenerate electrons • A heavier WD will have smaller radius • if Mass(WD) > 1.4 M(Sun) electrons can not resist gravity ! called Chandrasekhar limit and no WD has a mass greater than this • If WD can acquire mass from ...
... White Dwarves Mass vs Radius • In WD, gravity is balanced by pressure due to degenerate electrons • A heavier WD will have smaller radius • if Mass(WD) > 1.4 M(Sun) electrons can not resist gravity ! called Chandrasekhar limit and no WD has a mass greater than this • If WD can acquire mass from ...
ppt
... There are only two astronomical bodies that have a radius ~ 1.5 REarth: 1. White Dwarf 2. A terrestrial planet White Dwarfs have a mass of ~ 1 Solar Mass, so the radial velocity amplitude should be ~ 100s km/s. This is excluded by low precision radial velocity measurements. ...
... There are only two astronomical bodies that have a radius ~ 1.5 REarth: 1. White Dwarf 2. A terrestrial planet White Dwarfs have a mass of ~ 1 Solar Mass, so the radial velocity amplitude should be ~ 100s km/s. This is excluded by low precision radial velocity measurements. ...
Presentation Title, Arial Regular 29pt Sub title, Arial Regular 24pt
... CABB advantages: • highly increased continuum & polarisation sensitivity • highly increased uvcoverage ⇒ better images • large velocity coverage, high velocity resolution • multiline observations, esp. in the millimetre bands • combined line + continuum observations ...
... CABB advantages: • highly increased continuum & polarisation sensitivity • highly increased uvcoverage ⇒ better images • large velocity coverage, high velocity resolution • multiline observations, esp. in the millimetre bands • combined line + continuum observations ...
Overview of the Laser Communications Relay
... The PPM flight receiver is an optically pre-amplified direct detection receiver. After amplification and filtering, the signal is optically split to perform spatial tracking, clock recovery, and communications. The uplink communications signaling is 4-ary PPM, with a simple two comparator demodulat ...
... The PPM flight receiver is an optically pre-amplified direct detection receiver. After amplification and filtering, the signal is optically split to perform spatial tracking, clock recovery, and communications. The uplink communications signaling is 4-ary PPM, with a simple two comparator demodulat ...
20 pm - Starmap
... As a starting point, face North, holding the map in your eyesight direction, with its North down. As you change the direction, rotate the map accordingly. The objects listed on the first page can be observed with naked eyes, in clear skies, with moderate light pollution. Close your eyes one minute a ...
... As a starting point, face North, holding the map in your eyesight direction, with its North down. As you change the direction, rotate the map accordingly. The objects listed on the first page can be observed with naked eyes, in clear skies, with moderate light pollution. Close your eyes one minute a ...
No Slide Title
... – Then discuss with 2 other students, come to a consensus – I’ll ask one person from each group to describe reasoning to class as a whole Page 58 ...
... – Then discuss with 2 other students, come to a consensus – I’ll ask one person from each group to describe reasoning to class as a whole Page 58 ...
Joint Scientific Opportunities with the Giant Magellan Telescope and
... The GMT is being designed with extreme adaptive optics and imaging of exoplanets as a high priority. Old Jupiter class planets with small orbital semimajor axes will be detected in reflected light in the near-IR while younger giant planets will be imaged at longer wavelengths and larger distances fr ...
... The GMT is being designed with extreme adaptive optics and imaging of exoplanets as a high priority. Old Jupiter class planets with small orbital semimajor axes will be detected in reflected light in the near-IR while younger giant planets will be imaged at longer wavelengths and larger distances fr ...
RFO Yard Sale Inventory – as of May 29, 2013
... Free to a good home Optical Test Benches We also have two neglected optical test benches, one wood and one metal. They are somewhat buried in their current location, so it is difficult to access their exact size and condition. My best estimate is that they are about one foot wide and between six and ...
... Free to a good home Optical Test Benches We also have two neglected optical test benches, one wood and one metal. They are somewhat buried in their current location, so it is difficult to access their exact size and condition. My best estimate is that they are about one foot wide and between six and ...
PowerPoint
... The Alpha Centauri triple system– the closest being Proxima. • Walking time: 1 billion years • Fastest space probes (Voyagers 1 & 2, Pioneers 10 & 11) – 60,000 years at about 3.6 AU/year. ...
... The Alpha Centauri triple system– the closest being Proxima. • Walking time: 1 billion years • Fastest space probes (Voyagers 1 & 2, Pioneers 10 & 11) – 60,000 years at about 3.6 AU/year. ...
common constellations
... Members of the Underground Railroad were fully aware of the predicament of fleeing slaves. About 1831 the Railroad began to send travelers into the South to secretly teach slaves specific routes they could navigate using Polaris. By the beginning of the Civil War in 1861, about 500 people a year wer ...
... Members of the Underground Railroad were fully aware of the predicament of fleeing slaves. About 1831 the Railroad began to send travelers into the South to secretly teach slaves specific routes they could navigate using Polaris. By the beginning of the Civil War in 1861, about 500 people a year wer ...
Boy Scouts of America ASTRONOMY Merit Badge Guide
... the sky and where they can be found. You can locate and prepare lists of deep sky objects you want to observe like nebulae, star clusters and the brighter galaxies. You can print customized star charts to help you find objects in binoculars or a telescope. You can impress your friends by using the Di ...
... the sky and where they can be found. You can locate and prepare lists of deep sky objects you want to observe like nebulae, star clusters and the brighter galaxies. You can print customized star charts to help you find objects in binoculars or a telescope. You can impress your friends by using the Di ...
The Hubble Space Telescope
... Model: Use the week’s second passage to model for the whole class how to read and respond to a nonfiction text. First, read aloud the entire passage, stopping to reread difficult sections. Then, complete each selected response question as a class by first reading the question and answer choices alou ...
... Model: Use the week’s second passage to model for the whole class how to read and respond to a nonfiction text. First, read aloud the entire passage, stopping to reread difficult sections. Then, complete each selected response question as a class by first reading the question and answer choices alou ...
Lecture Topics 1023
... ASTR 1023 Lecture Topics These are the headings of the paragraphs into which ASTR 1023 lectures are divided. Use them to check your notes for completeness, and to see how the course is organized. It is also a good idea to cross-check these topics with your reading assignments, because some topics ar ...
... ASTR 1023 Lecture Topics These are the headings of the paragraphs into which ASTR 1023 lectures are divided. Use them to check your notes for completeness, and to see how the course is organized. It is also a good idea to cross-check these topics with your reading assignments, because some topics ar ...
T1100476_v2_H2TMS_Y_QPDsleds_AsBuilt
... location and size as close as possible according to T1000247. ...
... location and size as close as possible according to T1000247. ...
Project Medley Topics
... Assignment 15 Create a Children’s Story Book on the Sun Consider discussing the formation of the Sun, its structure and appearance, and the processes which produce sunlight. It should contain good factual information and must be at least 10 pages long. Be sure to state ahead of time the age group yo ...
... Assignment 15 Create a Children’s Story Book on the Sun Consider discussing the formation of the Sun, its structure and appearance, and the processes which produce sunlight. It should contain good factual information and must be at least 10 pages long. Be sure to state ahead of time the age group yo ...
TAP702-0: Red shift - Teaching Advanced Physics
... Red shift The wavelengths of spectral lines emitted by atoms in an astronomical object are often increased compared to a similar source in the laboratory. We see the same pattern of lines (so we can recognize the elements from which they arise), but the whole pattern is shifted to longer wavelengths ...
... Red shift The wavelengths of spectral lines emitted by atoms in an astronomical object are often increased compared to a similar source in the laboratory. We see the same pattern of lines (so we can recognize the elements from which they arise), but the whole pattern is shifted to longer wavelengths ...
File - Mr. Gray`s Class
... The day your hemisphere is tilted directly away from the sun Shortest day of the year Northern Hemisphere it is around December 21st, Southern Hemisphere is it around June 21st ...
... The day your hemisphere is tilted directly away from the sun Shortest day of the year Northern Hemisphere it is around December 21st, Southern Hemisphere is it around June 21st ...
- EPJ Web of Conferences
... hierarchical models are seen close to disruption, after considerable tidal damage. We have here another indication of how to improve Galaxy formation, and growth of structure, models. And, of course, if the dSph are essentially primordial, they have not contributed many stars to the Milky Way–yet. T ...
... hierarchical models are seen close to disruption, after considerable tidal damage. We have here another indication of how to improve Galaxy formation, and growth of structure, models. And, of course, if the dSph are essentially primordial, they have not contributed many stars to the Milky Way–yet. T ...
TAP702-0: Red shift - Teaching Advanced Physics
... Red shift The wavelengths of spectral lines emitted by atoms in an astronomical object are often increased compared to a similar source in the laboratory. We see the same pattern of lines (so we can recognize the elements from which they arise), but the whole pattern is shifted to longer wavelengths ...
... Red shift The wavelengths of spectral lines emitted by atoms in an astronomical object are often increased compared to a similar source in the laboratory. We see the same pattern of lines (so we can recognize the elements from which they arise), but the whole pattern is shifted to longer wavelengths ...
TAP702-0: Red shift - Teaching Advanced Physics
... Red shift The wavelengths of spectral lines emitted by atoms in an astronomical object are often increased compared to a similar source in the laboratory. We see the same pattern of lines (so we can recognize the elements from which they arise), but the whole pattern is shifted to longer wavelengths ...
... Red shift The wavelengths of spectral lines emitted by atoms in an astronomical object are often increased compared to a similar source in the laboratory. We see the same pattern of lines (so we can recognize the elements from which they arise), but the whole pattern is shifted to longer wavelengths ...
WORD - Astrophysics
... J-band magnitude of 25.2 and thus be hard to detect against the glare of the Sun. However, when relatively young, gas giant planets radiate away excess energy from their formation and are thus self-luminous, making them potentially much easier to detect. For example, at 1 Gyr, a 5 Jupiter-mass (MJ) ...
... J-band magnitude of 25.2 and thus be hard to detect against the glare of the Sun. However, when relatively young, gas giant planets radiate away excess energy from their formation and are thus self-luminous, making them potentially much easier to detect. For example, at 1 Gyr, a 5 Jupiter-mass (MJ) ...
Introduction Introduction to to Astrophysics Astrophysics
... Assignment 2: M31 is moving towards us relative to the Galactic center at a speed of approximately 120 km/s. Its distance to earth is approximately 2 million lightyears. in how many years from now will we collide based on these figures? However, as this motion is accelerated due to gravitational int ...
... Assignment 2: M31 is moving towards us relative to the Galactic center at a speed of approximately 120 km/s. Its distance to earth is approximately 2 million lightyears. in how many years from now will we collide based on these figures? However, as this motion is accelerated due to gravitational int ...
click here - CAPSTONE 2011
... 100,000,000 pc (1 Mpc) (local group)? 5 Mpc? 4. In each of the last three cases, how many stars would it take of solar type to make galaxies in which the stars reside bright enough to see with your eye? ...
... 100,000,000 pc (1 Mpc) (local group)? 5 Mpc? 4. In each of the last three cases, how many stars would it take of solar type to make galaxies in which the stars reside bright enough to see with your eye? ...
International Ultraviolet Explorer
![](https://en.wikipedia.org/wiki/Special:FilePath/International_Ultraviolet_Explorer.gif?width=300)
The International Ultraviolet Explorer (IUE) was an astronomical observatory satellite primarily designed to take ultraviolet spectra. The satellite was a collaborative project between NASA, the UK Science Research Council and the European Space Agency (ESA). The mission was first proposed in early 1964, by a group of scientists in the United Kingdom, and was launched on January 26, 1978 aboard a NASA Delta rocket. The mission lifetime was initially set for 3 years, but in the end it lasted almost 18 years, with the satellite being shut down in 1996. The switch-off occurred for financial reasons, while the telescope was still functioning at near original efficiency.It was the first space observatory to be operated in real time by astronomers who visited the groundstations in the United States and Europe. Astronomers made over 104,000 observations using the IUE, of objects ranging from solar system bodies to distant quasars. Among the significant scientific results from IUE data were the first large scale studies of stellar winds, accurate measurements of the way interstellar dust absorbs light, and measurements of the supernova SN1987A which showed that it defied stellar evolution theories as they then stood. When the mission ended, it was considered the most successful astronomical satellite ever.