ppt
... Earth-like planets: their velocity wobbles are simply too low We need different techniques: we have discussed two already that should yield Earth-size planets: transits and microlensing -- lots of ground-based programs at the moment Space-based missions hold much promise: ...
... Earth-like planets: their velocity wobbles are simply too low We need different techniques: we have discussed two already that should yield Earth-size planets: transits and microlensing -- lots of ground-based programs at the moment Space-based missions hold much promise: ...
Three Media Reports by Carole Gallagher
... sustaining life similar to life on Earth. Such a planet would have to be large enough to have an atmosphere but small enough to have continents and oceans. It would need to orbit an energy-giving star (like our sun) at a suitable distance, so as to be warmed by the star without becoming too hot. The ...
... sustaining life similar to life on Earth. Such a planet would have to be large enough to have an atmosphere but small enough to have continents and oceans. It would need to orbit an energy-giving star (like our sun) at a suitable distance, so as to be warmed by the star without becoming too hot. The ...
Distances
... • Near objects appear to move more than far objects against a distant horizon. • Trigonometric parallax is used to measure distance to near stars. ...
... • Near objects appear to move more than far objects against a distant horizon. • Trigonometric parallax is used to measure distance to near stars. ...
Lives of Stars - Madison County Schools
... Eventually, the red giant will run out of fuel as well and blow out its outer layers as a planetary nebula, leaving behind its core, a WHITE DWARF star. ...
... Eventually, the red giant will run out of fuel as well and blow out its outer layers as a planetary nebula, leaving behind its core, a WHITE DWARF star. ...
Standard EPS Shell Presentation
... The universe continued as a giant cloud of gas until about 300 million years after the Big Bang. Parts of the gas cloud began to collapse and ignite to form clusters of stars—the first galaxies. ...
... The universe continued as a giant cloud of gas until about 300 million years after the Big Bang. Parts of the gas cloud began to collapse and ignite to form clusters of stars—the first galaxies. ...
Great Observatories
... • Ion thrusters would take the estimated telescope lifetime for orbit change • ~2015 estimated deorbit without boosting ...
... • Ion thrusters would take the estimated telescope lifetime for orbit change • ~2015 estimated deorbit without boosting ...
Challenging our Understanding of Stellar Structure and Evolution
... phenomena such as convection, mass loss, turbulent mixing, rotation, and magnetic activity (Andersen 1998). Of the ∼40 stars with masses this accurately known (all in eclipsing binaries), three-quarters have masses between 1 and 3 M , a limited range over which to test stellar models. The MLR’s bro ...
... phenomena such as convection, mass loss, turbulent mixing, rotation, and magnetic activity (Andersen 1998). Of the ∼40 stars with masses this accurately known (all in eclipsing binaries), three-quarters have masses between 1 and 3 M , a limited range over which to test stellar models. The MLR’s bro ...
here - ESA Science
... as more accurate positions can be achieved a better measure of the Earth’s rotation can be determined. In combination with other data, many other physical properties of a star can be determined from astrometric data, such as: the luminosity, radius, mass and age. This information is then used to und ...
... as more accurate positions can be achieved a better measure of the Earth’s rotation can be determined. In combination with other data, many other physical properties of a star can be determined from astrometric data, such as: the luminosity, radius, mass and age. This information is then used to und ...
AST 150: Radioactive Dating Game Activity
... Hundreds of new planets have been discovered orbiting other stars in the Milky Way galaxy and we have just begun to explore. Since there are many alien solar systems, the question of whether there is intelligent life living there becomes more prevalent. It raises many other questions as well. What i ...
... Hundreds of new planets have been discovered orbiting other stars in the Milky Way galaxy and we have just begun to explore. Since there are many alien solar systems, the question of whether there is intelligent life living there becomes more prevalent. It raises many other questions as well. What i ...
Unit 3 - Section 9.7 2011 Universe Origin
... wavelengths of the spectral lines are shifted to higher values (i.e., red) than they would have been were the star stationary or moving side to side (neither towards nor away from us). This shifting is known as a Doppler shift. By measuring the shift in wavelength, the speed of movement away (red) o ...
... wavelengths of the spectral lines are shifted to higher values (i.e., red) than they would have been were the star stationary or moving side to side (neither towards nor away from us). This shifting is known as a Doppler shift. By measuring the shift in wavelength, the speed of movement away (red) o ...
SHELL H II REGIONS IN NGC 6334
... can be obtained from a single measurement and the application of the Doppler effect. In contrast, the plane-of-the-sky velocity requires of at least two measurements, as separated in time as possible. ...
... can be obtained from a single measurement and the application of the Doppler effect. In contrast, the plane-of-the-sky velocity requires of at least two measurements, as separated in time as possible. ...
Measuring large distances
... actual brightness observed on Earth to judge distance. • But Supernova are not all the same... ...
... actual brightness observed on Earth to judge distance. • But Supernova are not all the same... ...
PHYSICS 113 Assignment #9 SOLUTIONS Chapter 17 13. Starting
... measuring the light curves of Cepheid Variables. By establishing the period (in days) of their brightness changes, we can deduce their luminosity. By measuring their apparent brightness, we can thus determine their distance. Note that Cepheids can also be used to measure distances within our own gal ...
... measuring the light curves of Cepheid Variables. By establishing the period (in days) of their brightness changes, we can deduce their luminosity. By measuring their apparent brightness, we can thus determine their distance. Note that Cepheids can also be used to measure distances within our own gal ...
Standard EPS Shell Presentation
... values for absolute brightness using a source of light called a standard ...
... values for absolute brightness using a source of light called a standard ...
The Milky Way as a Spiral galaxy
... Sun. It became respectable to see the stars as other suns, like our Sun, but scattered through space, with the possibility of other planets around those suns and even intelligent life on those planets. And so the question arose: where is our Sun in this universe of stars? Answering this question req ...
... Sun. It became respectable to see the stars as other suns, like our Sun, but scattered through space, with the possibility of other planets around those suns and even intelligent life on those planets. And so the question arose: where is our Sun in this universe of stars? Answering this question req ...
Exoplanet Working Group
... • Background eclipsing binaries are source of confusion • Characterization of the transits requires other analysis of the signal • CoRoT detectivity limitation: (1.1 R 3days) on M0 dwarf stars Results are to be published and LCs will be available on request CoRoT-Brazil ...
... • Background eclipsing binaries are source of confusion • Characterization of the transits requires other analysis of the signal • CoRoT detectivity limitation: (1.1 R 3days) on M0 dwarf stars Results are to be published and LCs will be available on request CoRoT-Brazil ...
Number of planets - Associazione Astrofili "Crab Nebula"
... - however slight caused by a planet (both bodies orbit around the center of mass). For comparison, Jupiter – when seen from a distance of 10 light years – makes our Sun oscillate of about 1 millionth of grade, with a period of about 12 years. ...
... - however slight caused by a planet (both bodies orbit around the center of mass). For comparison, Jupiter – when seen from a distance of 10 light years – makes our Sun oscillate of about 1 millionth of grade, with a period of about 12 years. ...
Types of Stars
... • A nebula is a large cloud of gas and dust spread out over a large volume of space. • Some nebulas are glowing clouds lit from within by bright stars. • A star is formed when a contacting cloud of gas and dust becomes so dense and hot that ...
... • A nebula is a large cloud of gas and dust spread out over a large volume of space. • Some nebulas are glowing clouds lit from within by bright stars. • A star is formed when a contacting cloud of gas and dust becomes so dense and hot that ...
Getting to Know: Structure of the Universe
... How is a solar system different from a galaxy? A solar system is a star and the objects that orbit that star. Scientists have found several solar systems in our galaxy, many of which have planets surrounding them. If the Milky Way galaxy were the size of a quarter, the Sun would be the size of a sin ...
... How is a solar system different from a galaxy? A solar system is a star and the objects that orbit that star. Scientists have found several solar systems in our galaxy, many of which have planets surrounding them. If the Milky Way galaxy were the size of a quarter, the Sun would be the size of a sin ...
Document
... is the result of an enormous explosion known as the big bang. The explosion occurred 15-20 billion years ago. As the matter moved away from the explosion, gravity caused clusters to form. These clusters became the galaxies of the universe. Support comes from Red Shift and background radiation. ...
... is the result of an enormous explosion known as the big bang. The explosion occurred 15-20 billion years ago. As the matter moved away from the explosion, gravity caused clusters to form. These clusters became the galaxies of the universe. Support comes from Red Shift and background radiation. ...
Galaxies Powerpoint
... • A galaxy is a large grouping of stars, gas, and dust in space that are held together by gravity. • The largest galaxies contain more than a trillion stars. Smaller galaxies may have only a few million. • Scientists estimate the number of stars from the size and brightness of the galaxy. ...
... • A galaxy is a large grouping of stars, gas, and dust in space that are held together by gravity. • The largest galaxies contain more than a trillion stars. Smaller galaxies may have only a few million. • Scientists estimate the number of stars from the size and brightness of the galaxy. ...
Main Types of Galaxies
... • A galaxy is a large grouping of stars, gas, and dust in space that are held together by gravity. • The largest galaxies contain more than a trillion stars. Smaller galaxies may have only a few million. • Scientists estimate the number of stars from the size and brightness of the galaxy. ...
... • A galaxy is a large grouping of stars, gas, and dust in space that are held together by gravity. • The largest galaxies contain more than a trillion stars. Smaller galaxies may have only a few million. • Scientists estimate the number of stars from the size and brightness of the galaxy. ...
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... Slide credit: R. Kirshner, CfA ...
... Slide credit: R. Kirshner, CfA ...
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.