Physics 127 Descriptive Astronomy Homework #20 Key
... be used to find the distance to any galaxy you might choose? Explain your answer. Because the peak luminosity of a Type Ia supernova is well known, as they are all nearly identical, and because they are extremely luminous, they are superb standard candles for determining the distances of remote gala ...
... be used to find the distance to any galaxy you might choose? Explain your answer. Because the peak luminosity of a Type Ia supernova is well known, as they are all nearly identical, and because they are extremely luminous, they are superb standard candles for determining the distances of remote gala ...
The basic premise of the Nebular Model or Theory is that planets var
... Approx. 5 bya, after a long period of gravitational attraction, a nebula finally coalesced. This may have been started by a shock wave from an exploding star. Like water going down a drain, it started to spin as it contracted into a disc shape. Eventually, the density and temperature at its center b ...
... Approx. 5 bya, after a long period of gravitational attraction, a nebula finally coalesced. This may have been started by a shock wave from an exploding star. Like water going down a drain, it started to spin as it contracted into a disc shape. Eventually, the density and temperature at its center b ...
Planetary Configurations
... The Habitable Zone Water is likely key to life The Earth resides at a place where water can be liquid – defines a habitable zone! – Inner edge: place where runaway Greenhouse ...
... The Habitable Zone Water is likely key to life The Earth resides at a place where water can be liquid – defines a habitable zone! – Inner edge: place where runaway Greenhouse ...
Can you figure out which of the stars shown here have planets
... It's a big planet, with a mass like Jupiter, but it's located six times closer to its star than Mercury is to the Sun! Astronomers have since found many more such planets, and call them "Hot Jupiters" because of their size and high temperatures. ...
... It's a big planet, with a mass like Jupiter, but it's located six times closer to its star than Mercury is to the Sun! Astronomers have since found many more such planets, and call them "Hot Jupiters" because of their size and high temperatures. ...
The Planetarium Fleischmann Planetarium
... of their light into ultraviolet wavelengths. Older galaxies have less star-forming activity and thus give off less ultraviolet light. Both young and old stars radiate visible light, so young and old galaxies look similar when viewed in this wavelength. NASA’s Galaxy Evolution Explorer, with its high ...
... of their light into ultraviolet wavelengths. Older galaxies have less star-forming activity and thus give off less ultraviolet light. Both young and old stars radiate visible light, so young and old galaxies look similar when viewed in this wavelength. NASA’s Galaxy Evolution Explorer, with its high ...
GAIA Composition, Formation and Evolution of our Galaxy
... – 10 µas ≡ 10% at 10 kpc ≡ 1 AU at 100 kpc – 10 µas/yr at 20 kpc ≡ 1 km/s ⇒ every star in the Galaxy and Local Group will be seen to move ⇒ GAIA will quantify 6-D phase space for over 300 million stars, and 5-D phase-space for over 109 stars And an interesting data reduction challenge…. ...
... – 10 µas ≡ 10% at 10 kpc ≡ 1 AU at 100 kpc – 10 µas/yr at 20 kpc ≡ 1 km/s ⇒ every star in the Galaxy and Local Group will be seen to move ⇒ GAIA will quantify 6-D phase space for over 300 million stars, and 5-D phase-space for over 109 stars And an interesting data reduction challenge…. ...
Announcements Evolution of High-Mass Stars: Red Supergiants
... • To map the Milky Way Galaxy, we need to measure distances to stars. • Parallax only works for nearby stars (within about 1000 light years) • For more distant stars, we use Standard Candles Car Headlights are standard candles: We use them to determine the car’s distance ...
... • To map the Milky Way Galaxy, we need to measure distances to stars. • Parallax only works for nearby stars (within about 1000 light years) • For more distant stars, we use Standard Candles Car Headlights are standard candles: We use them to determine the car’s distance ...
A stars
... Around Sirius (Spectral type A1: 26 times more luminous than the Sun), an Earth-sized planet would have to orbit at about the distance of Jupiter from the star. Around Epsilon Indi (Spectral type K5: about one-tenth the Sun's luminosity), an Earth-sized planet would have to orbit at about the distan ...
... Around Sirius (Spectral type A1: 26 times more luminous than the Sun), an Earth-sized planet would have to orbit at about the distance of Jupiter from the star. Around Epsilon Indi (Spectral type K5: about one-tenth the Sun's luminosity), an Earth-sized planet would have to orbit at about the distan ...
Galaxies
... • The disk is very thin • Its “thickness” is only about 2% of its width • Spiral structure has been determined through radio observations – Radio observations have shown how the spiral arms move around the center of the galaxy ...
... • The disk is very thin • Its “thickness” is only about 2% of its width • Spiral structure has been determined through radio observations – Radio observations have shown how the spiral arms move around the center of the galaxy ...
HEIC9907 News release: Discovery finally lifts off on a Christmas
... several of the Shuttle launch conditions. The urgency of the mission - the telescope is currently not observing due to insufficient gyro stabilization - and the possibility of a week-long break in the Shuttle schedule over the New Year due to potential Y2K problems, made NASA officials elect to shor ...
... several of the Shuttle launch conditions. The urgency of the mission - the telescope is currently not observing due to insufficient gyro stabilization - and the possibility of a week-long break in the Shuttle schedule over the New Year due to potential Y2K problems, made NASA officials elect to shor ...
Sirius Astronomer - Orange County Astronomers
... space telescope had reported as having probable planets. The study revealed that many of the stars are actually somewhat larger than originally estimated. Most were slightly larger, and ¼ of the stars were at least 35% larger. Since the sizes of the planets found are calculated by the % of starlight ...
... space telescope had reported as having probable planets. The study revealed that many of the stars are actually somewhat larger than originally estimated. Most were slightly larger, and ¼ of the stars were at least 35% larger. Since the sizes of the planets found are calculated by the % of starlight ...
The mystery of cosmic oceans and dunes Earth
... to form planets. Several complex and competing processes are in play during planetary formation. The initial mass of the coalescing planet, the distribution of material feeding into the formation of stars and surrounding systems, density, star luminosity, orbit and potential collisions are all facto ...
... to form planets. Several complex and competing processes are in play during planetary formation. The initial mass of the coalescing planet, the distribution of material feeding into the formation of stars and surrounding systems, density, star luminosity, orbit and potential collisions are all facto ...
Observing the Solar System
... together or far apart – They are linked together, so they can be used individually or as one giant telescope 25km in diameter. ...
... together or far apart – They are linked together, so they can be used individually or as one giant telescope 25km in diameter. ...
Document
... Possible solutions to the Fermi paradox 2. Low probability of intelligent life • Life seems to appear quite easily in favorable conditions • But maybe it needs very special conditions for intelligence to emerge (= to become an asset in natural selection) • On Earth, it took more than 2 billion years ...
... Possible solutions to the Fermi paradox 2. Low probability of intelligent life • Life seems to appear quite easily in favorable conditions • But maybe it needs very special conditions for intelligence to emerge (= to become an asset in natural selection) • On Earth, it took more than 2 billion years ...
How common are habitable planets?
... the journal Proceedings of the National Academy of Sciences. Earth-size may not mean habitable ...
... the journal Proceedings of the National Academy of Sciences. Earth-size may not mean habitable ...
Planetary Configurations
... imagine other key criteria: 1. Planet must retain an atmosphere 2. Stable orbit ...
... imagine other key criteria: 1. Planet must retain an atmosphere 2. Stable orbit ...
The Origin of the Solar System
... observed today as dust disks of T Tauri stars. Sun and our Solar system formed ~ 4.6 billion years ago. ...
... observed today as dust disks of T Tauri stars. Sun and our Solar system formed ~ 4.6 billion years ago. ...
Document
... school children and other users per year. Materials required for teachers and students to use the telescope will be developed, in association with the Royal Observatory Greenwich, Liverpool John Moores University and the National Space Science Centre. Taken from the observatory website ...
... school children and other users per year. Materials required for teachers and students to use the telescope will be developed, in association with the Royal Observatory Greenwich, Liverpool John Moores University and the National Space Science Centre. Taken from the observatory website ...
Kepler 186f - Forum Skylive
... be ‘tidally locked’, which means one side always faces the star and the other side faces the cold open space, much like our moon is tidally locked with the Earth (we only see the “near side of the moon”). Fortunately, Kepler-186f orbits a fairly massive M dwarf star and it orbits at a large enough d ...
... be ‘tidally locked’, which means one side always faces the star and the other side faces the cold open space, much like our moon is tidally locked with the Earth (we only see the “near side of the moon”). Fortunately, Kepler-186f orbits a fairly massive M dwarf star and it orbits at a large enough d ...
NIE10x301Sponsor Thank You (Page 1)
... featureless balls of stars flattened to various degrees, but they cover an enormous range of sizes, from dwarfs to titanic giants formed from galaxy mergers with over a trillion stars! Galaxies are typically spread throughout the universe in groups and clusters. Our own neck of the woods in the cosm ...
... featureless balls of stars flattened to various degrees, but they cover an enormous range of sizes, from dwarfs to titanic giants formed from galaxy mergers with over a trillion stars! Galaxies are typically spread throughout the universe in groups and clusters. Our own neck of the woods in the cosm ...
Formation of the Solar System
... From statistics of detections, we estimate about 20% of Sun-like stars have habitable planet near Earth-size (1-2 Earth radii)! Most are probably around the most common kind of star, red dwarf (M class) stars. Since red dwarfs are dim, planets have small orbits to be in Habitable Zone. Leads to stro ...
... From statistics of detections, we estimate about 20% of Sun-like stars have habitable planet near Earth-size (1-2 Earth radii)! Most are probably around the most common kind of star, red dwarf (M class) stars. Since red dwarfs are dim, planets have small orbits to be in Habitable Zone. Leads to stro ...
Formation of the Solar System
... An advanced theory, called the condensation theory, includes the nebular theory but also incorporates interstellar dust as an essential ingredient in the formation of the planets. This theory claims that the dust grains of the interstellar medium helped cool the nebular cloud by radiating heat away, ...
... An advanced theory, called the condensation theory, includes the nebular theory but also incorporates interstellar dust as an essential ingredient in the formation of the planets. This theory claims that the dust grains of the interstellar medium helped cool the nebular cloud by radiating heat away, ...
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.