View Professor Thaler`s presentation slides
... It is called Kepler 10b (more about it later). The star moves slowly, because the planet has little mass. ...
... It is called Kepler 10b (more about it later). The star moves slowly, because the planet has little mass. ...
–1– 2. Milky Way We know a great deal, perhaps more than any
... • A similar, but much larger survey of nearby stars was done by Kapteyn around 1920. He used parallax, proper motions, radial velocities and spectra to infer the distance to stars. He inferred that the size of the MW is about 10 kpc, and the MW is flattened with an axial ratio of 1/5. The Sun is abo ...
... • A similar, but much larger survey of nearby stars was done by Kapteyn around 1920. He used parallax, proper motions, radial velocities and spectra to infer the distance to stars. He inferred that the size of the MW is about 10 kpc, and the MW is flattened with an axial ratio of 1/5. The Sun is abo ...
Nov - Wadhurst Astronomical Society
... Aries and continue it until you reach a faint parallelogram of stars that makes up the whale’s head. Brian provided the meeting with handouts to cover this talk and in this he mentioned a number of objects of interest to be found in the region. Mira otherwise known as Omicron Ceti, was one of the fi ...
... Aries and continue it until you reach a faint parallelogram of stars that makes up the whale’s head. Brian provided the meeting with handouts to cover this talk and in this he mentioned a number of objects of interest to be found in the region. Mira otherwise known as Omicron Ceti, was one of the fi ...
A billion pixels, a billion stars
... Gaia is scanning the sky repeatedly, detecting and measuring all sources that are bright enough. However, some sources can suddenly change dramatically in brightness, putting them over the threshold at which they become “visible” to Gaia. These transient and variable sources are the subject of a spe ...
... Gaia is scanning the sky repeatedly, detecting and measuring all sources that are bright enough. However, some sources can suddenly change dramatically in brightness, putting them over the threshold at which they become “visible” to Gaia. These transient and variable sources are the subject of a spe ...
01 - University of Warwick
... satellites around Pluto were also discovered. It appears EL61, but it begins the process of creating an understanding likely, now, that other Kuiper belt objects (at least large of the early history of the outer solar system. Kuiper belt objects) might also have multiple satellite systems. From the ...
... satellites around Pluto were also discovered. It appears EL61, but it begins the process of creating an understanding likely, now, that other Kuiper belt objects (at least large of the early history of the outer solar system. Kuiper belt objects) might also have multiple satellite systems. From the ...
Friday, January 27, 2017 First exam a week from today. Review
... In exploding white dwarfs (arising in stars with mass less than about 8 times the Sun), the core is composed of Carbon and Oxygen, and the explosion creates the intermediate-mass elements, Magnesium, Silicon, Calcium, and also Iron. (between about 8 and about 12 solar masses, different story, maybe ...
... In exploding white dwarfs (arising in stars with mass less than about 8 times the Sun), the core is composed of Carbon and Oxygen, and the explosion creates the intermediate-mass elements, Magnesium, Silicon, Calcium, and also Iron. (between about 8 and about 12 solar masses, different story, maybe ...
A report of the SEEDS Direct Imaging Survey
... GJ 504b is a cold Jovian planet orbiting a relatively old Sun-like star and has unique atmospheric features. One young planet is also confirmed (HD 100546 b). □ Many circumstellar disks are detected down to r=0.1”. Fine structures such as gaps and spirals of <100 au scale are discovered for the firs ...
... GJ 504b is a cold Jovian planet orbiting a relatively old Sun-like star and has unique atmospheric features. One young planet is also confirmed (HD 100546 b). □ Many circumstellar disks are detected down to r=0.1”. Fine structures such as gaps and spirals of <100 au scale are discovered for the firs ...
Cosmic Distance Ladder Terrence Tao (UCLA)
... have implied that the stars were an absurdly large distance away. ...
... have implied that the stars were an absurdly large distance away. ...
The Milky Way Galaxy
... and M31 [Parameters of the Galaxy's dark halo] Launhardt, R., Zylka, R., & Mezger, P.G., 2002, A&A, 384, 112 The nuclear bulge of the Galaxy [Parameters of the Galaxy's bulge and nuclear disk] Malhotra, S., 1995, ApJ, 448, 138 The Vertical Distribution and Kinematics of H i and Mass Models of the Ga ...
... and M31 [Parameters of the Galaxy's dark halo] Launhardt, R., Zylka, R., & Mezger, P.G., 2002, A&A, 384, 112 The nuclear bulge of the Galaxy [Parameters of the Galaxy's bulge and nuclear disk] Malhotra, S., 1995, ApJ, 448, 138 The Vertical Distribution and Kinematics of H i and Mass Models of the Ga ...
File
... Scientists believe that the center of all spiral galaxies contains a massive black hole, an extremely dense area from which light cannot escape. Our galaxy is believed to be a barred spiral galaxy, similar in appearance to the Andromeda Galaxy. o Elliptical galaxies are spherical or elliptical (oval ...
... Scientists believe that the center of all spiral galaxies contains a massive black hole, an extremely dense area from which light cannot escape. Our galaxy is believed to be a barred spiral galaxy, similar in appearance to the Andromeda Galaxy. o Elliptical galaxies are spherical or elliptical (oval ...
Weighing a Galaxy15 Nov 11/15/2010
... To find mass of sun, measure period T & size R of a planet’s orbit. Kepler’s 3rd Law: M = R3 / T2 for R in AU, T in years, and M in solar masses. ...
... To find mass of sun, measure period T & size R of a planet’s orbit. Kepler’s 3rd Law: M = R3 / T2 for R in AU, T in years, and M in solar masses. ...
- EPJ Web of Conferences
... Figure 2. (a) Mean metallicity, and (b) metallicity dispersion, [Fe/H], vs. system absolute magnitude, MV ,total , for the dwarf galaxy satellites of the Milky Way and the massive globular cluster Cen. Figure from [10]. ...
... Figure 2. (a) Mean metallicity, and (b) metallicity dispersion, [Fe/H], vs. system absolute magnitude, MV ,total , for the dwarf galaxy satellites of the Milky Way and the massive globular cluster Cen. Figure from [10]. ...
Chapter 5 Galaxies and Star Systems
... Galaxy. One orbit of the solar system takes about 225 to 250 million years at a speed of half a million miles per hour. The solar system has orbited 20 to 25 times since it formed 4.6 billion years ago. The center of our galaxy is located about 28,000 light-years away, beyond the constellation Sagi ...
... Galaxy. One orbit of the solar system takes about 225 to 250 million years at a speed of half a million miles per hour. The solar system has orbited 20 to 25 times since it formed 4.6 billion years ago. The center of our galaxy is located about 28,000 light-years away, beyond the constellation Sagi ...
Lecture 17 Review
... 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. That these clouds are the source of stars follows from several observations: ...
... 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. That these clouds are the source of stars follows from several observations: ...
The HARPS search for southern extra-solar planets
... quantitative relation has been established for M dwarfs yet. Bonfils et al. (2007) used variations of these indices to unveil a 35 days rotation period for Gl 674, later confirmed by a photometric campaign, but those of Gl 581 do not measurably vary. The low rotational velocity which we measure for ...
... quantitative relation has been established for M dwarfs yet. Bonfils et al. (2007) used variations of these indices to unveil a 35 days rotation period for Gl 674, later confirmed by a photometric campaign, but those of Gl 581 do not measurably vary. The low rotational velocity which we measure for ...
Beyond Our Solar System
... region 1,600,000 km wide. – Earth is the small blue dot in the center. – The moon—whose diameter is only one-fourth that of Earth—is an even smaller dot along its orbit 380,000 km from Earth. – These numbers are so large that it is inconvenient to write them out. ...
... region 1,600,000 km wide. – Earth is the small blue dot in the center. – The moon—whose diameter is only one-fourth that of Earth—is an even smaller dot along its orbit 380,000 km from Earth. – These numbers are so large that it is inconvenient to write them out. ...
Lecture 12
... Actually, possible to measure p to substantially better accuracy than the resolution of the telescope. 1838: Bessel measured p = 0.316’’ for star 61 Cygni (modern value p = 0.29’’) current ground-based: best errors of ~0.001 arcsec Hipparcos satellite: measured ~105 bright stars with errors also of ...
... Actually, possible to measure p to substantially better accuracy than the resolution of the telescope. 1838: Bessel measured p = 0.316’’ for star 61 Cygni (modern value p = 0.29’’) current ground-based: best errors of ~0.001 arcsec Hipparcos satellite: measured ~105 bright stars with errors also of ...
Stellar Birth - Chabot College
... Same relative distance comparing relative brightness is fair Same relative age comparing masses and types of stars is fair ...
... Same relative distance comparing relative brightness is fair Same relative age comparing masses and types of stars is fair ...
Reading Science!
... McDonald Observatory has a wide range of telescopes for astronomers to use. A telescope works by gathering and focusing light from distant objects in the sky. This light is then directed into an instrument attached to the telescope, which makes the object appear bigger and brighter. An astronomer ca ...
... McDonald Observatory has a wide range of telescopes for astronomers to use. A telescope works by gathering and focusing light from distant objects in the sky. This light is then directed into an instrument attached to the telescope, which makes the object appear bigger and brighter. An astronomer ca ...
Document
... • High Mass stars often times explode! • This spreads all of the elements Hydrogen through Iron (which makes up our planets and other new stars) and forms all elements after Iron (up to element 92- Uranium). ...
... • High Mass stars often times explode! • This spreads all of the elements Hydrogen through Iron (which makes up our planets and other new stars) and forms all elements after Iron (up to element 92- Uranium). ...
Jul - Wadhurst Astronomical Society
... Brian looked at how the Moon was formed. He said the most popular theory at present is that in the distant past the Earth was struck by a Mars sized body subsequently given the name Theia. The resulting strike may be why the Earth’s axis is at an angle to the plane of the Sun but this does give us ...
... Brian looked at how the Moon was formed. He said the most popular theory at present is that in the distant past the Earth was struck by a Mars sized body subsequently given the name Theia. The resulting strike may be why the Earth’s axis is at an angle to the plane of the Sun but this does give us ...
Gresham Lecture, Wednesday 15 December 2010 Unsolved
... have “known unknowns” – things that we know must exist or happen to allow our universe to exist but of which we have no real understanding. In this lecture we will look at some of the, as yet unsolved, mysteries of the Universe and describe the scientific instruments that are now coming into use or ...
... have “known unknowns” – things that we know must exist or happen to allow our universe to exist but of which we have no real understanding. In this lecture we will look at some of the, as yet unsolved, mysteries of the Universe and describe the scientific instruments that are now coming into use or ...
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.