The Milky Way - Montgomery College
... The Galactic Center (I) Our view (in visible light) towards the Galactic center (GC) is heavily obscured by gas and dust: ...
... The Galactic Center (I) Our view (in visible light) towards the Galactic center (GC) is heavily obscured by gas and dust: ...
In Retrospect: Kepler`s Astronomia Nova
... the centre of the Universe around which everything in the celestial domain revolves. Kepler was the first to realize that orbits are better described by ellipses traversed at nonuniform speed than by combinations of ‘perfect’ circular motions on which orbits had hitherto been modelled. Like a modern ...
... the centre of the Universe around which everything in the celestial domain revolves. Kepler was the first to realize that orbits are better described by ellipses traversed at nonuniform speed than by combinations of ‘perfect’ circular motions on which orbits had hitherto been modelled. Like a modern ...
STARS AND PLANETS: A NEW SET OF MIDDLE SCHOOL
... main sequence stars with every day objects using the same scale as the Scale Model Solar System activity. They then compare the sizes of stars of different classes (on this scale ranging from the size of a cherry to a small car) to the Sun and Earth. Key concepts include: • Stars are not all the sam ...
... main sequence stars with every day objects using the same scale as the Scale Model Solar System activity. They then compare the sizes of stars of different classes (on this scale ranging from the size of a cherry to a small car) to the Sun and Earth. Key concepts include: • Stars are not all the sam ...
AS1001:Extra-Galactic Astronomy Stars and Gas in Galaxies
... ~10% of a galaxy’s total mass. • The rest is DARK MATTER. • The orbit velocity of the STARS + GAS is too large - they should fly away! • Not enough gravity to hold the galaxy together, unless there is DARK MATTER (or unless our theory of gravity is wrong). • Lets examine the evidence … ...
... ~10% of a galaxy’s total mass. • The rest is DARK MATTER. • The orbit velocity of the STARS + GAS is too large - they should fly away! • Not enough gravity to hold the galaxy together, unless there is DARK MATTER (or unless our theory of gravity is wrong). • Lets examine the evidence … ...
AAS/AAPT meeting consolidated synopses by Richard Berry PDF
... Stardial is a CCD camera located on the roof of the Astronomy Building at the University of Illinois in Urbana, IL. The camera has operated continuously since 1996, imaging a band of the sky centered on declination –4° by drift scanning a Kodak KAF 400 CCD at the focus of a 50 mm f/2 camera lens. Th ...
... Stardial is a CCD camera located on the roof of the Astronomy Building at the University of Illinois in Urbana, IL. The camera has operated continuously since 1996, imaging a band of the sky centered on declination –4° by drift scanning a Kodak KAF 400 CCD at the focus of a 50 mm f/2 camera lens. Th ...
The Milky Way Galaxy
... Given differential rotation, arms should be stretched and smeared out after a few revolutions (Sun has made 20 already): ...
... Given differential rotation, arms should be stretched and smeared out after a few revolutions (Sun has made 20 already): ...
October - Sonoma County Astronomical Society
... Capodimonte in Naples, Italy. This newly discovered extrasolar planet is more than 3 times as large as Jupiter. It used to orbit its star, called V391 Pegasi, at about the same distance that Earth is from the sun. V391 Pegasi belongs to a rare class of stars, called B-type subdwarfs. It started out ...
... Capodimonte in Naples, Italy. This newly discovered extrasolar planet is more than 3 times as large as Jupiter. It used to orbit its star, called V391 Pegasi, at about the same distance that Earth is from the sun. V391 Pegasi belongs to a rare class of stars, called B-type subdwarfs. It started out ...
February 2015 - Hermanus Astronomy
... Way form, but most galaxies in the universe are faint, distant dwarf galaxies," said Principal Investigator David Nidever of the University of Michigan. "The Magellanic Clouds are two of the few nearby dwarf galaxies, and SMASH is able to map out and study the structures in them like no other survey ...
... Way form, but most galaxies in the universe are faint, distant dwarf galaxies," said Principal Investigator David Nidever of the University of Michigan. "The Magellanic Clouds are two of the few nearby dwarf galaxies, and SMASH is able to map out and study the structures in them like no other survey ...
The Life Cycle of Stars
... exhausted its ability to fuse other elements like carbon and oxygen, it will become a red giant and expand in size to envelope the Earth. And surprisingly, the larger the mass of the star, the quicker it burns its fuel sources and the shorter its lifespan. Also see and read about Hubble Space Telesc ...
... exhausted its ability to fuse other elements like carbon and oxygen, it will become a red giant and expand in size to envelope the Earth. And surprisingly, the larger the mass of the star, the quicker it burns its fuel sources and the shorter its lifespan. Also see and read about Hubble Space Telesc ...
Document
... – Semimajor axis: “how far you are away from that something” – Mass: “how much gravity is pulling you around in orbit” ...
... – Semimajor axis: “how far you are away from that something” – Mass: “how much gravity is pulling you around in orbit” ...
Stellar Evolution
... how a star’s life and death will proceed. • We can “weigh” stars that are in binary systems (two stars orbiting each other). Fortunately, most stars fall into this category. ...
... how a star’s life and death will proceed. • We can “weigh” stars that are in binary systems (two stars orbiting each other). Fortunately, most stars fall into this category. ...
Unit 1
... • Photons traveling away from a massive object will experience a gravitational redshift. – Their frequency will be shifted toward the red end of the ...
... • Photons traveling away from a massive object will experience a gravitational redshift. – Their frequency will be shifted toward the red end of the ...
Chapter 8: Stars
... sequence for a long time, they don’t stay their forever. • Average stars like the Sun, become red giants and then white dwarfs. • Massive stars use their hydrogen much faster than stars like the sun do. ...
... sequence for a long time, they don’t stay their forever. • Average stars like the Sun, become red giants and then white dwarfs. • Massive stars use their hydrogen much faster than stars like the sun do. ...
Extragalactic AO Science
... reduce throughput further making it difficult to observe faint extended sources. Normal galaxy disks only achieve a maximum SB of K~16 mag/sq arcsec and this fades as (1+z)4. This means all normal disks are fainter than 22.5 mag within 0.05x0.05”. ...
... reduce throughput further making it difficult to observe faint extended sources. Normal galaxy disks only achieve a maximum SB of K~16 mag/sq arcsec and this fades as (1+z)4. This means all normal disks are fainter than 22.5 mag within 0.05x0.05”. ...
Milky Way structure
... • What is the closest galaxy to the Milky Way? The new answer to this old question is the Canis Major dwarf galaxy. For many years astronomers thought the Large Magellan Cloud (LMC) was closest, but its title was supplanted in 1994 by the Sagittarius dwarf galaxy. Recent measurements ind ...
... • What is the closest galaxy to the Milky Way? The new answer to this old question is the Canis Major dwarf galaxy. For many years astronomers thought the Large Magellan Cloud (LMC) was closest, but its title was supplanted in 1994 by the Sagittarius dwarf galaxy. Recent measurements ind ...
chapter 26 instructor notes
... eventually produced Population I stars (akin to ideas about the formation of the solar system). ...
... eventually produced Population I stars (akin to ideas about the formation of the solar system). ...
Chapter 14 The Milky Way Galaxy
... The galactic halo and globular clusters formed very early; the halo is essentially spherical. All the stars in the halo are very old, and there is no gas and dust. The galactic disk is where the youngest stars are, as well as star formation regions – emission nebulae, large clouds of gas and ...
... The galactic halo and globular clusters formed very early; the halo is essentially spherical. All the stars in the halo are very old, and there is no gas and dust. The galactic disk is where the youngest stars are, as well as star formation regions – emission nebulae, large clouds of gas and ...
How many stars are in the Milky Way Galaxy?
... 1: Draw and label diagrams of the Milky Way from top and side views, showing the major components. Indicate the approximate dimensions of the components and note the location of the Sun in each diagram. 2: Describe the galactic distribution of general interstellar material, nebulae, and open and glo ...
... 1: Draw and label diagrams of the Milky Way from top and side views, showing the major components. Indicate the approximate dimensions of the components and note the location of the Sun in each diagram. 2: Describe the galactic distribution of general interstellar material, nebulae, and open and glo ...
Powerpoint
... Type Sa has the largest central bulge, Type Sb is smaller, and Type Sc is the smallest. Type Sa tends to have the most tightly bound spiral arms, with Types Sb and Sc progressively less tight, although the correlation is not perfect. The components of spiral galaxies are the same as in ...
... Type Sa has the largest central bulge, Type Sb is smaller, and Type Sc is the smallest. Type Sa tends to have the most tightly bound spiral arms, with Types Sb and Sc progressively less tight, although the correlation is not perfect. The components of spiral galaxies are the same as in ...
DUPREE_SPLINTER
... Candidates for second parameter: age, environment (including free-floating planets); primordial He abundance; surface pollution (helium); CNO abundances; rotation; mass loss….. ...
... Candidates for second parameter: age, environment (including free-floating planets); primordial He abundance; surface pollution (helium); CNO abundances; rotation; mass loss….. ...
ph512-11-lec5
... Astrometry is the branch of astronomy that relates to precise measurements and explanations of the positions and movements of stars and other celestial bodies. Although once thought of as an esoteric field with little useful application for the future, the information obtained by astrometric measure ...
... Astrometry is the branch of astronomy that relates to precise measurements and explanations of the positions and movements of stars and other celestial bodies. Although once thought of as an esoteric field with little useful application for the future, the information obtained by astrometric measure ...
Linking Asteroids and Meteorites through Reflectance
... • At the dawn of the 20th century, most astronomers thought that the Milky Way Galaxy was the universe, and it measured only a few thousand light-years across. ...
... • At the dawn of the 20th century, most astronomers thought that the Milky Way Galaxy was the universe, and it measured only a few thousand light-years across. ...
galaxy - 106Thursday130-430
... Components of a Galaxy A spiral galaxy like the Milky Way has 3 basic components of its visible matter: 1) The disk (containing the spiral arms), 2) The halo, and 3) The nucleus or central bulge. The halo and the nucleus are also referred to collectively as the spherical distribution component of t ...
... Components of a Galaxy A spiral galaxy like the Milky Way has 3 basic components of its visible matter: 1) The disk (containing the spiral arms), 2) The halo, and 3) The nucleus or central bulge. The halo and the nucleus are also referred to collectively as the spherical distribution component of t ...
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.