The case for Optical SETI
... that a search be made for interstellar laser signals. They suggested two laser systems which at that time had yet to be built. System A used a single continuous wave (CW) laser while System B used a group of 25 lasers in a star configuration with the same laser characteristics as System A. System A ...
... that a search be made for interstellar laser signals. They suggested two laser systems which at that time had yet to be built. System A used a single continuous wave (CW) laser while System B used a group of 25 lasers in a star configuration with the same laser characteristics as System A. System A ...
Bioptic telescopes - The College of Optometrists
... is possible for those who have any one or more of these ocular disorders. Psychological adjustment to the onset of visual impairment mimics the grieving process as the individual can experience emotions of anger, depression and disbelief before ‘acceptance’. ‘Acceptance’ means realisation of the sig ...
... is possible for those who have any one or more of these ocular disorders. Psychological adjustment to the onset of visual impairment mimics the grieving process as the individual can experience emotions of anger, depression and disbelief before ‘acceptance’. ‘Acceptance’ means realisation of the sig ...
Stars Part 1
... basketball players who are very tall and very thin. - now add the population of obese children •The plot would show a cluster of people that would have similar “middle-of-the-road” height/weight ratios •It would also show a smaller cluster of “very tall and very thin” AND a smaller cluster of “very ...
... basketball players who are very tall and very thin. - now add the population of obese children •The plot would show a cluster of people that would have similar “middle-of-the-road” height/weight ratios •It would also show a smaller cluster of “very tall and very thin” AND a smaller cluster of “very ...
Lecture 11: Stars, HR diagram.
... There is a very tight relationship between luminosity and temperature We see that the Sun is in this sequence... Then there is something in common between the Sun and the rest of the stars in the main sequence.... They are all burning H into He in their cores More luminous = hotter = more massive! L ...
... There is a very tight relationship between luminosity and temperature We see that the Sun is in this sequence... Then there is something in common between the Sun and the rest of the stars in the main sequence.... They are all burning H into He in their cores More luminous = hotter = more massive! L ...
Te lescopes - Astromedia AB
... Celestron’s 80mm and 102mm refractor models are top choices for beginning observers who want to start with a more powerful telescope and for intermediate level astronomers. These instruments perform equally well for viewing within our solar system and for deep-sky observing. Starting with a more pow ...
... Celestron’s 80mm and 102mm refractor models are top choices for beginning observers who want to start with a more powerful telescope and for intermediate level astronomers. These instruments perform equally well for viewing within our solar system and for deep-sky observing. Starting with a more pow ...
Treating with Spectacle Lenses: A Novel Idea!?
... • Multiplexing offers a new way of thinking about low vision devices – Electronics or optics ...
... • Multiplexing offers a new way of thinking about low vision devices – Electronics or optics ...
Abstract - UChicago High Energy Physics
... important role in the nucleosynthesis that takes place in and around disks [6–9]. For example, the wind outflows [10, 11] above disks can be home to nucleosynthesis, including perhaps the r-process, depending on neutrino flavor composition [2, 9, 12–16]. The neutrino flavor composition above the neu ...
... important role in the nucleosynthesis that takes place in and around disks [6–9]. For example, the wind outflows [10, 11] above disks can be home to nucleosynthesis, including perhaps the r-process, depending on neutrino flavor composition [2, 9, 12–16]. The neutrino flavor composition above the neu ...
CENTRAL TEXAS COLLEGE
... given in those cases where the student has completed the majority of the course work, but because of personal illness, death in the immediate family, or military orders, the student is unable to complete the requirements for a course...” Prior approval from the instructor is required before the grad ...
... given in those cases where the student has completed the majority of the course work, but because of personal illness, death in the immediate family, or military orders, the student is unable to complete the requirements for a course...” Prior approval from the instructor is required before the grad ...
Surface reflectance properties of distant Solar system bodies
... of possible faint objects found on long-exposure frames taken with the Hubble Space Telescope (HST), Cochran et al. (1995) found that many of the possible objects identified were not just noise, but were likely to be Halley-sized (i.e. ~ 10 kIn) KBOs (although no one object could be confirmed as bei ...
... of possible faint objects found on long-exposure frames taken with the Hubble Space Telescope (HST), Cochran et al. (1995) found that many of the possible objects identified were not just noise, but were likely to be Halley-sized (i.e. ~ 10 kIn) KBOs (although no one object could be confirmed as bei ...
09-08-10_Becklin
... • The Theta (80%) is what is used on SOFIA to measure the quality of the optics. It is the enclosed energy specified at about 0.55 microns. • It includes all of the optical components of all mirrors out side of the instrument. It also includes the misalignment of the optics, focus and the effects of ...
... • The Theta (80%) is what is used on SOFIA to measure the quality of the optics. It is the enclosed energy specified at about 0.55 microns. • It includes all of the optical components of all mirrors out side of the instrument. It also includes the misalignment of the optics, focus and the effects of ...
Variable star information
... periodic manner. These pulsations translate into a periodic variation of the light they emit. The most well known stars of this kind are Cepheid variables that have very stable pulsation periods. The changes in the observed brightness of an extrinsic variable star are either due to some process that ...
... periodic manner. These pulsations translate into a periodic variation of the light they emit. The most well known stars of this kind are Cepheid variables that have very stable pulsation periods. The changes in the observed brightness of an extrinsic variable star are either due to some process that ...
using a cepheid variable to determine distance
... In this exercise you will use data taken from observations of a Cepheid variable star over a period of 80 days. On each day, the apparent visual magnitude was recorded. Using this data you will be able to plot a light-curve for this Cepheid, and from this light curve, determine the period of the lig ...
... In this exercise you will use data taken from observations of a Cepheid variable star over a period of 80 days. On each day, the apparent visual magnitude was recorded. Using this data you will be able to plot a light-curve for this Cepheid, and from this light curve, determine the period of the lig ...
Summer 2014 Mercury - Astronomical Society of the Pacific
... Unlike Galileo, Marius did not rush into print but first published his “discoveries” in 1614 in his magnum opus, Mundus Iovialis. (In those days of Latin texts the letter “I” was used instead of “J”). This year marks the 400th anniversary of that publication, and the astronomical community of 2014 i ...
... Unlike Galileo, Marius did not rush into print but first published his “discoveries” in 1614 in his magnum opus, Mundus Iovialis. (In those days of Latin texts the letter “I” was used instead of “J”). This year marks the 400th anniversary of that publication, and the astronomical community of 2014 i ...
Magnitudes and Colours of Stars - Lincoln
... In fact, as we will see in the next Module, stars behave very like practical examples of black bodies - theoretical objects with properties that have been determined by classical physicists. (We will leave the tricky question of how someone could describe a star as a black body to the next Module!) ...
... In fact, as we will see in the next Module, stars behave very like practical examples of black bodies - theoretical objects with properties that have been determined by classical physicists. (We will leave the tricky question of how someone could describe a star as a black body to the next Module!) ...
NearInfrared Study of the Pulsar Wind Nebula in G21.50.9 A. Zajczyk , Y. Gallant
... been discovered with radio telescopes (Gupta et al. 2005; Camilo et al. 2006), soon followed by its detection in the rays by the Fermi space telescope (Caliandro 2009). This PWN is heavily obscured in the optical band where the interstellar extinction is estimated to AV=10 (Gorenstein 1975), bas ...
... been discovered with radio telescopes (Gupta et al. 2005; Camilo et al. 2006), soon followed by its detection in the rays by the Fermi space telescope (Caliandro 2009). This PWN is heavily obscured in the optical band where the interstellar extinction is estimated to AV=10 (Gorenstein 1975), bas ...
Hubble Diagram Instruction Sheet
... To create a Hubble Diagram, the redshift and velocity of your object is needed, as well as the distance. To find the redshift of an object astronomers use spectroscopy. Spectroscopy is a branch of science that is concerned with the investigation and measurement of the spectrum of light produced when ...
... To create a Hubble Diagram, the redshift and velocity of your object is needed, as well as the distance. To find the redshift of an object astronomers use spectroscopy. Spectroscopy is a branch of science that is concerned with the investigation and measurement of the spectrum of light produced when ...
claims the fastest winds in our solar system. Who killed Pluto? T or F
... 1. _____________________ claims the fastest winds in our solar system. 2. Who killed Pluto? _______________________ 3. T or F. Pluto’s moon, Charon, is very small compared to Pluto. 4. At the turn of the century, astronomers believe there was a ninth planet because the orbits of Neptune and Uranus w ...
... 1. _____________________ claims the fastest winds in our solar system. 2. Who killed Pluto? _______________________ 3. T or F. Pluto’s moon, Charon, is very small compared to Pluto. 4. At the turn of the century, astronomers believe there was a ninth planet because the orbits of Neptune and Uranus w ...
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... Remote access to digital sky survey (DSS) images is integrated into FACSUM and downloaded images may be displayed directly in DS9 (providing on the fly finder charts). The JSkyCalc program written b ...
... Remote access to digital sky survey (DSS) images is integrated into FACSUM and downloaded images may be displayed directly in DS9 (providing on the fly finder charts). The JSkyCalc program written b ...
Astronomy 252: Short Project 2 Stellar Spectra: Their Classification
... From the lectures you already know that stars come in a wide range of sizes and temperatures. The hottest stars in the sky have temperatures in excess of 40,000 K, whereas the coolest stars that we can detect optically have temperatures on the order of 2000 - 3000 K. As you might guess, the appearan ...
... From the lectures you already know that stars come in a wide range of sizes and temperatures. The hottest stars in the sky have temperatures in excess of 40,000 K, whereas the coolest stars that we can detect optically have temperatures on the order of 2000 - 3000 K. As you might guess, the appearan ...
Luminosity
... These two stars have about the same luminosity -- which one appears brighter? A. Alpha Centauri B. The Sun ...
... These two stars have about the same luminosity -- which one appears brighter? A. Alpha Centauri B. The Sun ...
How far away are the Stars?
... Parallax Angle is Small! • The closer the object the larger the parallax. • Parallaxes are usually very small. Parallax of Venus at closest approach (45 million km) is 1 arc minute! • Parallax of nearby (25 light years) stars ...
... Parallax Angle is Small! • The closer the object the larger the parallax. • Parallaxes are usually very small. Parallax of Venus at closest approach (45 million km) is 1 arc minute! • Parallax of nearby (25 light years) stars ...
Announcements - Lick Observatory
... • The central `star’ isn’t a star because it has no energy source. This is a white dwarf. • Supported against gravity by e- degeneracy. • Lots of residual heat, no energy source, a white dwarf is like a hot ember. As it radiates energy into space, the white dwarf cools off. • There is an upper limit ...
... • The central `star’ isn’t a star because it has no energy source. This is a white dwarf. • Supported against gravity by e- degeneracy. • Lots of residual heat, no energy source, a white dwarf is like a hot ember. As it radiates energy into space, the white dwarf cools off. • There is an upper limit ...
Phase: Period Normalization
... From these timings we have also refined the properties of the tertiary component and re-determined its mass and orbital parameters. We subtracted out the best fit parabola which then presumably left us with only the 3rd body light-time effects. A non-linear least squares search was then used on thes ...
... From these timings we have also refined the properties of the tertiary component and re-determined its mass and orbital parameters. We subtracted out the best fit parabola which then presumably left us with only the 3rd body light-time effects. A non-linear least squares search was then used on thes ...
Comets
... predicted the return of this comet in 1758, which indeed took place. Thus, Halley showed that comets orbit the Sun in elliptical orbits with variable periods. ...
... predicted the return of this comet in 1758, which indeed took place. Thus, Halley showed that comets orbit the Sun in elliptical orbits with variable periods. ...
Space Science Chapter 10.1 textbook
... If you were studying space exploration 100 years ago, you would have been told that everything in “outer space” never changes. This was as much as astronomers (people who study objects in space) were able to observe by using the best instruments of the time, early telescopes. Astronomers formed theo ...
... If you were studying space exploration 100 years ago, you would have been told that everything in “outer space” never changes. This was as much as astronomers (people who study objects in space) were able to observe by using the best instruments of the time, early telescopes. Astronomers formed theo ...
International Ultraviolet Explorer
The International Ultraviolet Explorer (IUE) was an astronomical observatory satellite primarily designed to take ultraviolet spectra. The satellite was a collaborative project between NASA, the UK Science Research Council and the European Space Agency (ESA). The mission was first proposed in early 1964, by a group of scientists in the United Kingdom, and was launched on January 26, 1978 aboard a NASA Delta rocket. The mission lifetime was initially set for 3 years, but in the end it lasted almost 18 years, with the satellite being shut down in 1996. The switch-off occurred for financial reasons, while the telescope was still functioning at near original efficiency.It was the first space observatory to be operated in real time by astronomers who visited the groundstations in the United States and Europe. Astronomers made over 104,000 observations using the IUE, of objects ranging from solar system bodies to distant quasars. Among the significant scientific results from IUE data were the first large scale studies of stellar winds, accurate measurements of the way interstellar dust absorbs light, and measurements of the supernova SN1987A which showed that it defied stellar evolution theories as they then stood. When the mission ended, it was considered the most successful astronomical satellite ever.