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1-Syllabus-Intro
... Grading will be based on a “modified curve”. Anyone earning 90% or better will earn an A- or higher. 50% is required to pass (D or better) and 60% for a C- or better. If you’re taking the course S/N, then a grade of ‘S’ will mean “C- or better ...
... Grading will be based on a “modified curve”. Anyone earning 90% or better will earn an A- or higher. 50% is required to pass (D or better) and 60% for a C- or better. If you’re taking the course S/N, then a grade of ‘S’ will mean “C- or better ...
Lecture 17, PPT version
... Main sequence mass < 5 Msun: white dwarf Main sequence mass between 5 Msun and 40 Msun: neutron star Main sequence mass > 40 Msun: black hole ...
... Main sequence mass < 5 Msun: white dwarf Main sequence mass between 5 Msun and 40 Msun: neutron star Main sequence mass > 40 Msun: black hole ...
Document
... Understand that the sun is many thousands of times closer to the earth than any other star. Light from the sun takes a few minutes to reach the earth, but light from the next nearest star takes a few years to arrive. The trip to that star would take the fastest rocket thousands of years.
... Understand that the sun is many thousands of times closer to the earth than any other star. Light from the sun takes a few minutes to reach the earth, but light from the next nearest star takes a few years to arrive. The trip to that star would take the fastest rocket thousands of years.
Cosmic Distance Ladder Terrence Tao (UCLA)
... precise relationship. This gave yet another way to obtain absolute brightness, and hence observed distances. • Because Cepheids are so bright, this method works up to 13,000,000 light years! Most galaxies are fortunate to have at least one Cepheid in them, so we know the distances to all galaxies ou ...
... precise relationship. This gave yet another way to obtain absolute brightness, and hence observed distances. • Because Cepheids are so bright, this method works up to 13,000,000 light years! Most galaxies are fortunate to have at least one Cepheid in them, so we know the distances to all galaxies ou ...
rotation of the Earth
... ancient Greeks were already aware that the Moon would appear in slightly different locations relative to the stars when viewed from different locations on the Earth, and used this effect to accurately estimate its distance from Earth. However, the lack of any parallax between the stars demonstrated ...
... ancient Greeks were already aware that the Moon would appear in slightly different locations relative to the stars when viewed from different locations on the Earth, and used this effect to accurately estimate its distance from Earth. However, the lack of any parallax between the stars demonstrated ...
THE GALILEO PROJECT: Music of the Spheres
... In late 16th-century Florence, the house of the lutenist and composer Vincenzo Galilei was a fertile breeding ground for important innovations in the realms of music and of science. Vincenzo’s experiments with the expressive power of accompanied solo song influenced the creation of opera as a musica ...
... In late 16th-century Florence, the house of the lutenist and composer Vincenzo Galilei was a fertile breeding ground for important innovations in the realms of music and of science. Vincenzo’s experiments with the expressive power of accompanied solo song influenced the creation of opera as a musica ...
DAS FOCUS Newsletter_MARCH_2015
... forecasts for the upcoming Dark Window and it appears that we’re in for a break. Above average temperatures beginning on March 11 and clearing skies, just in time to welcome in the March Dark Window. Hopefully, by the time you read this it hasn’t changed and you’ll have seen a post or two for some o ...
... forecasts for the upcoming Dark Window and it appears that we’re in for a break. Above average temperatures beginning on March 11 and clearing skies, just in time to welcome in the March Dark Window. Hopefully, by the time you read this it hasn’t changed and you’ll have seen a post or two for some o ...
Clusters of galaxies
... Spectroscopy is FORS2 (R ~ 1200) Science goals are build up of stellar populations with redshift (plus weak lensing). ...
... Spectroscopy is FORS2 (R ~ 1200) Science goals are build up of stellar populations with redshift (plus weak lensing). ...
ppt - Physics
... •ERE narrow bands - related to DIBs? •CO - 4th Positive, Cameron •OH - Mixture of UV-pumped Cold OH and Photodissociated H2O? ...
... •ERE narrow bands - related to DIBs? •CO - 4th Positive, Cameron •OH - Mixture of UV-pumped Cold OH and Photodissociated H2O? ...
dwarf planets
... • A minor planet is an astronomical object in direct orbit around the Sun that is neither a dominant planet nor originally classified as a comet. • Minor planets can be dwarf planets, asteroids, trojans, centaurs, Kuiper belt objects, and other trans-Neptunian objects.[1] • The first minor planet di ...
... • A minor planet is an astronomical object in direct orbit around the Sun that is neither a dominant planet nor originally classified as a comet. • Minor planets can be dwarf planets, asteroids, trojans, centaurs, Kuiper belt objects, and other trans-Neptunian objects.[1] • The first minor planet di ...
History of Astronomy
... Sun-centered models had been considered • Philolaus: Sun – the central “fire” at the center of the universe • Aristarchus: Earth must be smaller ...
... Sun-centered models had been considered • Philolaus: Sun – the central “fire” at the center of the universe • Aristarchus: Earth must be smaller ...
slide-show source file - Bartol Research Institute
... and mass loss rates up to a billion times the solar wind, i.e. ~ 10-5 MO/yr ! This is large enough that, during the course of their relatively brief (~10 7 yr) evolutionary lifetime, such massive stars can be stripped of their entire hydrogen envelope, exposing a “WolfRayet” star characterized by s ...
... and mass loss rates up to a billion times the solar wind, i.e. ~ 10-5 MO/yr ! This is large enough that, during the course of their relatively brief (~10 7 yr) evolutionary lifetime, such massive stars can be stripped of their entire hydrogen envelope, exposing a “WolfRayet” star characterized by s ...
Word - NASA Infrared Telescope Facility
... This document will attempt to present the potential hazards connected with operating the IRTF as it relates to the TCS and how the TCS3 and associated systems negate these hazards to put the telescope in a safe condition for operation, maintenance, and facility protection. This document will mainly ...
... This document will attempt to present the potential hazards connected with operating the IRTF as it relates to the TCS and how the TCS3 and associated systems negate these hazards to put the telescope in a safe condition for operation, maintenance, and facility protection. This document will mainly ...
The star Betelgeuse is about 500 light years away from us. If this star
... e) galaxy collisions shouldn't have been more common in the past than they are now The Milky Way star Procyon is 11 light-years from the Sun while the Milky Way star Acrux is 320 light-years from the Sun. Hubble’s Law implies that: a) Procyon is moving at the same speed as Acrux b) Procyon ...
... e) galaxy collisions shouldn't have been more common in the past than they are now The Milky Way star Procyon is 11 light-years from the Sun while the Milky Way star Acrux is 320 light-years from the Sun. Hubble’s Law implies that: a) Procyon is moving at the same speed as Acrux b) Procyon ...
Adaptive Optics for the SALT
... a Spherical Aberration Corrector4 (SAC) that provides a field flattened, aberration corrected 10 arcminute diameter field of view. Optical path differences introduced by the atmosphere prevent many ground based telescopes from reaching their diffraction limited performance, as the plane wavefront from a ...
... a Spherical Aberration Corrector4 (SAC) that provides a field flattened, aberration corrected 10 arcminute diameter field of view. Optical path differences introduced by the atmosphere prevent many ground based telescopes from reaching their diffraction limited performance, as the plane wavefront from a ...
Birth and Death of Stars
... • After the supergiant stage, massive stars contract with a gravitational force much greater than low mass stars. The high pressures and temperatures that result causes nuclear fusion to begin again. This time the core fuses into heavier elements such as oxygen, magnesium, or silicon. Fusion continu ...
... • After the supergiant stage, massive stars contract with a gravitational force much greater than low mass stars. The high pressures and temperatures that result causes nuclear fusion to begin again. This time the core fuses into heavier elements such as oxygen, magnesium, or silicon. Fusion continu ...
Efficiently mining the X
... Data Mining Interested in the sources found in the data but also in the context (i.e. why we found them in that selection) ...
... Data Mining Interested in the sources found in the data but also in the context (i.e. why we found them in that selection) ...
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... • During the plateau, the photosphere is working it’s way through the Hydrogen layer, at nearly constant Teff=6000 K. ...
... • During the plateau, the photosphere is working it’s way through the Hydrogen layer, at nearly constant Teff=6000 K. ...
Comet Pan-Starrs 12 March 2013
... Fe disintegrates into protons and neutrons Protons and electrons combine to form neutrons This takes heat out of the star Without pressure support the core collapses Gravitational potential energy is converted to heat, and the outer part of the star is ejected • The core may stabilize as a neutron ...
... Fe disintegrates into protons and neutrons Protons and electrons combine to form neutrons This takes heat out of the star Without pressure support the core collapses Gravitational potential energy is converted to heat, and the outer part of the star is ejected • The core may stabilize as a neutron ...
Biology Revision Pack
... Artificial satellites are built by people and launched by rockets into space, where they orbit around the Earth. These are some of the things that artificial satellites are used for: communications, including broadcasting television programmes and relaying telephone calls Global Positioning System ( ...
... Artificial satellites are built by people and launched by rockets into space, where they orbit around the Earth. These are some of the things that artificial satellites are used for: communications, including broadcasting television programmes and relaying telephone calls Global Positioning System ( ...
What we will do today:
... enough to light our sky at night. The only explanation that it is not is that the stars are moving away from us. An expanding universe must have started out infinitely small and agrees with the Big Bang Theory ...
... enough to light our sky at night. The only explanation that it is not is that the stars are moving away from us. An expanding universe must have started out infinitely small and agrees with the Big Bang Theory ...
Astronomical Knowledge Questionnaire (Student
... 10 Current evidence about how the universe is changing tells us that … We are near the centre of the universe. Galaxies are expanding into empty space. Groups of galaxies appear to move away from each other. Nearby galaxies are younger than distant galaxies. I do not know the answer to thi ...
... 10 Current evidence about how the universe is changing tells us that … We are near the centre of the universe. Galaxies are expanding into empty space. Groups of galaxies appear to move away from each other. Nearby galaxies are younger than distant galaxies. I do not know the answer to thi ...
Pointing Model for the Large Millimeter Telescope Computational Physics Project 2
... time. The data in the data file is a mixture of strings and floats, so we have to evaluate each entry in the table to get it to the ...
... time. The data in the data file is a mixture of strings and floats, so we have to evaluate each entry in the table to get it to the ...
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.