Stellar Properties
... • a star could be very bright because is was very close to us; not because it was truly bright • two stars in the same constellation might not be close to each other; one could be much farther away ...
... • a star could be very bright because is was very close to us; not because it was truly bright • two stars in the same constellation might not be close to each other; one could be much farther away ...
Multi-Coated Achromatic Lenses
... pushbutton slow-motion controls; observe structural detail in Jupiter’s cloud belts and Red Spot; resolve dusky markings on Saturn, as well as the Cassini division. Explore over 30,000 of Autostar’s database objects, or any object of known R.A. and Dec., as the telescope moves automatically at 4.5°/ ...
... pushbutton slow-motion controls; observe structural detail in Jupiter’s cloud belts and Red Spot; resolve dusky markings on Saturn, as well as the Cassini division. Explore over 30,000 of Autostar’s database objects, or any object of known R.A. and Dec., as the telescope moves automatically at 4.5°/ ...
Lecture26_Future
... Kepler team has estimated that there are "at least 50 billion planets in the Milky Way", of which "at least 500 million" are in the habitable zone. ...
... Kepler team has estimated that there are "at least 50 billion planets in the Milky Way", of which "at least 500 million" are in the habitable zone. ...
Determining the mass loss limit for close
... for blow-off in the case of the classic Newtonian gravitational potential. For very massive or Jupiter-class exoplanets exposed to less intense stellar XUV fluxes at orbital distances > 0.15 AU the exobase temperatures can be lower than the critical temperature for the onset of the blow-off. This wi ...
... for blow-off in the case of the classic Newtonian gravitational potential. For very massive or Jupiter-class exoplanets exposed to less intense stellar XUV fluxes at orbital distances > 0.15 AU the exobase temperatures can be lower than the critical temperature for the onset of the blow-off. This wi ...
3.1 Radio Astronomy Research Results For much of PY 2010, radio
... interference. PALFA now use longer observations (9 min instead of 4.5 min) for Galactic longitudes between ~30° and 45° to expand the effective search volume. In PY 2010, PALFA continued processing data via the Einstein@Home community, which was originally developed to process LIGO data for coheren ...
... interference. PALFA now use longer observations (9 min instead of 4.5 min) for Galactic longitudes between ~30° and 45° to expand the effective search volume. In PY 2010, PALFA continued processing data via the Einstein@Home community, which was originally developed to process LIGO data for coheren ...
13.1 Galaxy Evolution: Introduction
... actually not an easy thing to do, because we can observe a lot near us but, for example, we have no spectra of very metal-poor very massive stars because those have burnt out long time ago. And, again from theory tested by observations of star clusters and so on, we need stellar pop ...
... actually not an easy thing to do, because we can observe a lot near us but, for example, we have no spectra of very metal-poor very massive stars because those have burnt out long time ago. And, again from theory tested by observations of star clusters and so on, we need stellar pop ...
Planetary Radii Across Five Orders of Magnitude in Mass and Stellar
... planets that orbit relatively close to their parent stars. This means that radial velocity follow-up will be possible for some planets as the stellar ‘‘wobble’’ signal is larger for shorter period orbits. However, for transiting planets that are low mass, or that orbit very distant stars, stellar ra ...
... planets that orbit relatively close to their parent stars. This means that radial velocity follow-up will be possible for some planets as the stellar ‘‘wobble’’ signal is larger for shorter period orbits. However, for transiting planets that are low mass, or that orbit very distant stars, stellar ra ...
Activity : Milky Way
... comprise them, but can be explained as density waves moving relative to the background material. • Our Galaxy appears to be a two (plus two) armed spiral of intermediate pitch angle or winding looseness (type Sb) perhaps similar to NGC 2997 in the earlier frame. The brightest part of the Milky Way i ...
... comprise them, but can be explained as density waves moving relative to the background material. • Our Galaxy appears to be a two (plus two) armed spiral of intermediate pitch angle or winding looseness (type Sb) perhaps similar to NGC 2997 in the earlier frame. The brightest part of the Milky Way i ...
Spring 2015 Mercury - Astronomical Society of the Pacific
... observed it in 1764 and noted a nebula surrounding the cluster. Using a much more powerful telescope, Caroline and William Herschel viewed the Eagle Nebula in 1783 and counted more than 100 stars. David Malin, the brilliant astrophotographer at the AngloAustralian Observatory, was responsible for wh ...
... observed it in 1764 and noted a nebula surrounding the cluster. Using a much more powerful telescope, Caroline and William Herschel viewed the Eagle Nebula in 1783 and counted more than 100 stars. David Malin, the brilliant astrophotographer at the AngloAustralian Observatory, was responsible for wh ...
Galaxies Astronomy 1 — Elementary Astronomy LA Mission College Spring F2015
... Astronomy 1 — Elementary Astronomy LA Mission College Spring F2015 ...
... Astronomy 1 — Elementary Astronomy LA Mission College Spring F2015 ...
Joint Scientific Opportunities with the Giant Magellan Telescope and
... theory, which is also fundamental to theories of planet formation. In addition, ALMA will measure directly ...
... theory, which is also fundamental to theories of planet formation. In addition, ALMA will measure directly ...
sections 12-15 instructor notes
... Bright O and B-type stars are not aligned with the Galactic plane, but concentrate towards a great circle inclined to the plane by ~16°. That feature is known as Gould’s Belt, and is interpreted as a Venetian blind effect resulting from the tilt of the local spiral feature to the Galactic plane, wi ...
... Bright O and B-type stars are not aligned with the Galactic plane, but concentrate towards a great circle inclined to the plane by ~16°. That feature is known as Gould’s Belt, and is interpreted as a Venetian blind effect resulting from the tilt of the local spiral feature to the Galactic plane, wi ...
Next Generation VLA Science White Paper
... Radio telescopes are essential to our understanding of “galaxy ecosytems,” here meaning the complex interplay of gas, stars, black holes, and dark matter in and around galaxies. They provide a main tool to study almost all phases of gas in galaxies: cool and cold gas (via emission and absorption lin ...
... Radio telescopes are essential to our understanding of “galaxy ecosytems,” here meaning the complex interplay of gas, stars, black holes, and dark matter in and around galaxies. They provide a main tool to study almost all phases of gas in galaxies: cool and cold gas (via emission and absorption lin ...
White Paper on the Revival of Stellar Intensity Interferometry E. Ribak S. LeBohec
... explain these bright events, and later concentrated on polar shells. Another model tries to explain the effect by assuming relativistic plasma fireballs in which directionality sets all these observed parameters (14). These unresolved, hot spots (which seem to us like jets) are a perfect target for ...
... explain these bright events, and later concentrated on polar shells. Another model tries to explain the effect by assuming relativistic plasma fireballs in which directionality sets all these observed parameters (14). These unresolved, hot spots (which seem to us like jets) are a perfect target for ...
Constraints on Long-Period Planets from an L
... based on the planets’ own thermal luminosity, not on reflected starlight. The enabling technology is adaptive optics (AO), which allows 6-10m ground-based telescopes to obtain diffraction limited IR images several times sharper than those from HST, despite Earth’s turbulent atmosphere. Theoretical m ...
... based on the planets’ own thermal luminosity, not on reflected starlight. The enabling technology is adaptive optics (AO), which allows 6-10m ground-based telescopes to obtain diffraction limited IR images several times sharper than those from HST, despite Earth’s turbulent atmosphere. Theoretical m ...
silicon and oxygen abundances in planet-host stars
... of stars without any known planetary-mass companions. Based on their results, stars with planets appear to be indistinguishable from other field stars and seem to simply lie on the highmetallicity end of otherwise “normal” stellar distributions. Given the metal-rich nature of planet-hosting stars, a ...
... of stars without any known planetary-mass companions. Based on their results, stars with planets appear to be indistinguishable from other field stars and seem to simply lie on the highmetallicity end of otherwise “normal” stellar distributions. Given the metal-rich nature of planet-hosting stars, a ...
Full Programme and Abstracts - UK Exoplanet community meeting
... Earth is the best studied planet we know. A century’s work on terrestrial samples has interrogated 90% of its history, and revealed the physics of processes from the formation of the core to the rise of atmospheric oxygen. This detailed understanding can benefit our perspective of exo-planetary syst ...
... Earth is the best studied planet we know. A century’s work on terrestrial samples has interrogated 90% of its history, and revealed the physics of processes from the formation of the core to the rise of atmospheric oxygen. This detailed understanding can benefit our perspective of exo-planetary syst ...
course objectives - Metropolitan Community College
... COURSE DESCRIPTION: This course is an introductory course in astronomy that covers the tools of astronomy, the night sky, the solar system, stars and star systems, galaxies, and cosmology. This is a lecture-only course. The lab course that complements this course is SCIE 1310. ...
... COURSE DESCRIPTION: This course is an introductory course in astronomy that covers the tools of astronomy, the night sky, the solar system, stars and star systems, galaxies, and cosmology. This is a lecture-only course. The lab course that complements this course is SCIE 1310. ...
Option D – Astrophysics
... The Sun was formed about 4.6 billion years ago from the collapse of an enormous cloud of gas and dust. Evidence from radioisotopes in the Earth’s surface suggests that the Earth was formed about the same time, 4.5 billion years ago. Table 16.1 shows some details of the planets of our solar system (w ...
... The Sun was formed about 4.6 billion years ago from the collapse of an enormous cloud of gas and dust. Evidence from radioisotopes in the Earth’s surface suggests that the Earth was formed about the same time, 4.5 billion years ago. Table 16.1 shows some details of the planets of our solar system (w ...
The WSO, a world-class observatory for the ultraviolet
... echelle spectra providing an ability to study the dynamics of hot plasma and separate multiple stellar and interstellar absorption components. However, there are a few emerging problems with this provision. First, since HST has UV, optical and infra-red capabilities, the available observing time is ...
... echelle spectra providing an ability to study the dynamics of hot plasma and separate multiple stellar and interstellar absorption components. However, there are a few emerging problems with this provision. First, since HST has UV, optical and infra-red capabilities, the available observing time is ...
UK Exoplanet community meeting 2017
... Earth is the best studied planet we know. A century’s work on terrestrial samples has interrogated 90% of its history, and revealed the physics of processes from the formation of the core to the rise of atmospheric oxygen. This detailed understanding can benefit our perspective of exo-planetary syst ...
... Earth is the best studied planet we know. A century’s work on terrestrial samples has interrogated 90% of its history, and revealed the physics of processes from the formation of the core to the rise of atmospheric oxygen. This detailed understanding can benefit our perspective of exo-planetary syst ...
The empirical mass distribution of hot B subdwarfs
... prototype of this class was discovered in 2003 [12], and a dozen is currently being observed from space with the NASA Kepler mission. The first pulsating sdB modeled by asteroseismology was PG 0014+067 in 2001 [13], and since a decade our group has published detailed analyses of 15 pulsating B subdw ...
... prototype of this class was discovered in 2003 [12], and a dozen is currently being observed from space with the NASA Kepler mission. The first pulsating sdB modeled by asteroseismology was PG 0014+067 in 2001 [13], and since a decade our group has published detailed analyses of 15 pulsating B subdw ...
![Module 4.1 - The Scale of the Universe [slide 1] We now turn to](http://s1.studyres.com/store/data/002846843_1-9e0ec9d1a2abbbab3c0d406694bfc4e2-300x300.png)
Module 4.1 - The Scale of the Universe [slide 1] We now turn to
... therefore, luminosity must change. If we observe stars spectroscopically, we can observe the velocity of the photo sphere. Come towards us and go away from us. So we can measure stellar temperatures using colors or spectroscopy. We can measure velocity of the pulsating photosphere using spectroscopy ...
... therefore, luminosity must change. If we observe stars spectroscopically, we can observe the velocity of the photo sphere. Come towards us and go away from us. So we can measure stellar temperatures using colors or spectroscopy. We can measure velocity of the pulsating photosphere using spectroscopy ...
A COMPREHENSIVE COMPARISON OF THE SUN TO
... identify 11 maximally independent properties that have plausible correlations with habitability and that have been observed by, or can be derived from, sufficiently large, currently available, and representative stellar surveys. By comparing solar values for the 11 properties to the resultant stella ...
... identify 11 maximally independent properties that have plausible correlations with habitability and that have been observed by, or can be derived from, sufficiently large, currently available, and representative stellar surveys. By comparing solar values for the 11 properties to the resultant stella ...
Space Interferometry Mission
The Space Interferometry Mission, or SIM, also known as SIM Lite (formerly known as SIM PlanetQuest), was a planned space telescope developed by the U.S. National Aeronautics and Space Administration (NASA), in conjunction with contractor Northrop Grumman. One of the main goals of the mission was the hunt for Earth-sized planets orbiting in the habitable zones of nearby stars other than the Sun. SIM was postponed several times and finally cancelled in 2010.In addition to hunting for extrasolar planets, SIM would have helped astronomers construct a map of the Milky Way galaxy. Other important tasks would have included collecting data to help pinpoint stellar masses for specific types of stars, assisting in the determination of the spatial distribution of dark matter in the Milky Way and in the Local Group of galaxies and using the gravitational microlensing effect to measure the mass of stars.The spacecraft would have used optical interferometry to accomplish these and other scientific goals. This technique collects light with multiple mirrors (in SIM's case, two) which is combined to make an interference pattern which can be very precisely measured.The initial contracts for SIM Lite were awarded in 1998, totaling US$200 million. Work on the SIM project required scientists and engineers to move through eight specific new technology milestones, and by November 2006, all eight had been completed.SIM Lite was originally scheduled for a 2005 launch, aboard an Evolved Expendable Launch Vehicle (EELV). As a result of continued budget cuts, the launch date has been pushed back at least five times. NASA has set a preliminary launch date for 2015 and U.S. federal budget documents confirm that a launch date is expected ""no earlier"" than 2015. The budget cuts to SIM Lite are expected to continue through FY 2010. As of February 2007, many of the engineers working on the SIM program had moved on to other areas and projects, and NASA directed the project to allocate its resources toward engineering risk reduction. However, the preliminary budget for NASA for 2008 included zero dollars for SIM.In December 2007, the Congress restored funding for fiscal year 2008 as part of an omnibus appropriations bill which the President later signed. At the same time the Congress directed NASA to move the mission forward to the development phase. In 2009 the project continued its risk reduction work while waiting for the findings and recommendations of the Astronomy and Astrophysics Decadal Survey, Astro2010, performed by the National Academy of Sciences, which would determine the project's future.On 13 August 2010, the Astro2010 Decadal Report was released and did not recommend that NASA continue the development of the SIM Lite Astrometric Observatory. This prompted NASA Astronomy and Physics Director, Jon Morse, to issue a letter on 24 September 2010 to the SIM Lite project manager, informing him that NASA was discontinuing its sponsorship of the SIM Lite mission and directing the project to discontinue Phase B activities immediately or as soon as practical. Accordingly, all SIM Lite activities were closed down by the end of calendar year 2010.