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LHDC High-Performance Fine-Steering Mirror Family
... The components of a typical precision pointing system include: – Beam-expander telescope – Fine-steering mechanism or fast-steering mechanism: two-axis reducedaperture, full-aperture steering mirror or isolation system – Coarse-pointing mechanism: vehicle attitude control system, two-axis gimbaled t ...
... The components of a typical precision pointing system include: – Beam-expander telescope – Fine-steering mechanism or fast-steering mechanism: two-axis reducedaperture, full-aperture steering mirror or isolation system – Coarse-pointing mechanism: vehicle attitude control system, two-axis gimbaled t ...
Click here to view Carolyn`s poster
... Smart X-ray Optics: Prototype Design The SXO project is combining both the classical x-ray telescope design with the theory of adaptive optics, with the goal of achieving a resolution of 0.1 arc seconds. A prototype will be produced consisting of a segment of cylindrical shell, on the back of which ...
... Smart X-ray Optics: Prototype Design The SXO project is combining both the classical x-ray telescope design with the theory of adaptive optics, with the goal of achieving a resolution of 0.1 arc seconds. A prototype will be produced consisting of a segment of cylindrical shell, on the back of which ...
P7 Further Physics
... Astronomers often use the “parsec” to describe galactic distances. A parsec is roughly 3¼ light years. Angles involved in parallax measurements are often very small and are measured in seconds of an arc (arcseconds). A second of an arc is 1/60th of a minute of an arc, which is 1/60th of a degree. In ...
... Astronomers often use the “parsec” to describe galactic distances. A parsec is roughly 3¼ light years. Angles involved in parallax measurements are often very small and are measured in seconds of an arc (arcseconds). A second of an arc is 1/60th of a minute of an arc, which is 1/60th of a degree. In ...
Star Map - Science Centre
... the Sun. This known as an opposition as Saturn and the Sun become directly opposite each other, as seen from Earth. ...
... the Sun. This known as an opposition as Saturn and the Sun become directly opposite each other, as seen from Earth. ...
Chemical abundances and winds of massive stars in M31: a B
... HD 60753 (B3 IV) to achieve reliable flux calibration. Atmospheric correction was achieved by observing HR4074 within an air mass of 0.10 from HD 92809. A standard data reduction was again carried out with iraf. These observations were supplemented by high resolution (HIRES), International Ultraviol ...
... HD 60753 (B3 IV) to achieve reliable flux calibration. Atmospheric correction was achieved by observing HR4074 within an air mass of 0.10 from HD 92809. A standard data reduction was again carried out with iraf. These observations were supplemented by high resolution (HIRES), International Ultraviol ...
Dishing Up the Data: The Role of Australian Space Tracking and
... due to launch or spacecraft systems failures, the performance of the DSIF itself was highly successful and demonstrated the importance of a world-wide tracking station network, controlled from a central location (in this case JPL), as an essential element in future space missions to the Moon and pla ...
... due to launch or spacecraft systems failures, the performance of the DSIF itself was highly successful and demonstrated the importance of a world-wide tracking station network, controlled from a central location (in this case JPL), as an essential element in future space missions to the Moon and pla ...
Small Wonders: Cygnus
... binoculars. Heck, there’s even one that I'll talk about (it's not in the list however) that's best seen with the naked eye! We’ll start with the constellation itself. Cygnus is (amazingly enough) a constellation that even we unimaginative modern luddites can visualize as its namesake – the swan. But ...
... binoculars. Heck, there’s even one that I'll talk about (it's not in the list however) that's best seen with the naked eye! We’ll start with the constellation itself. Cygnus is (amazingly enough) a constellation that even we unimaginative modern luddites can visualize as its namesake – the swan. But ...
X-ray Emission from Massive Stars
... Could we have been wrong about the lack of a magnetic dynamo - might massive star X-rays be similar to solar X-rays? Before we address this directly, we need to know about one very important property of massive stars (that might provide an alternate explanation for their X-rays)… ...
... Could we have been wrong about the lack of a magnetic dynamo - might massive star X-rays be similar to solar X-rays? Before we address this directly, we need to know about one very important property of massive stars (that might provide an alternate explanation for their X-rays)… ...
Stars and the Milky Way
... • the Milky Way is one of billions of galaxies in the universe • the Milky Way is made up of over 200 billion stars Other facts about the Milky Way • The Sun is just one of the stars in the Milky Way. • It is called the Milky Way because when astronomers looked up at the sky, they saw a line of ligh ...
... • the Milky Way is one of billions of galaxies in the universe • the Milky Way is made up of over 200 billion stars Other facts about the Milky Way • The Sun is just one of the stars in the Milky Way. • It is called the Milky Way because when astronomers looked up at the sky, they saw a line of ligh ...
Opakování z minulého cvičení
... Traditionally, spectroscopy dealt with visible light, but it has been extended to cover other wavelengths of electromagnetic radiation and even to measurements of the distribution of energy among particles, such as cosmic rays. The first spectroscopy does is to tell us what stars , galaxies and so o ...
... Traditionally, spectroscopy dealt with visible light, but it has been extended to cover other wavelengths of electromagnetic radiation and even to measurements of the distribution of energy among particles, such as cosmic rays. The first spectroscopy does is to tell us what stars , galaxies and so o ...
Goal: To understand the structure and makeup of our own Milky Way
... you could see individual objects you MIGHT be able to watch them move. • This is how we find asteroids and Trans Neptunian Objects (TNOs) such as Pluto. • However, if you have soooo many homes they all merge together, then you won’t. • Also, if the size of the system is so big that the motions are t ...
... you could see individual objects you MIGHT be able to watch them move. • This is how we find asteroids and Trans Neptunian Objects (TNOs) such as Pluto. • However, if you have soooo many homes they all merge together, then you won’t. • Also, if the size of the system is so big that the motions are t ...
Review 3 (11-18-10)
... Apparent brightness: how bright a star looks in the sky The inverse-square Law: light from stars gets fainter as the inverse square of the distance (brightness proportional to 1/d2). If we know the apparent brightness and the distance to a star we can calculate its absolute (intrinsic) brightness ...
... Apparent brightness: how bright a star looks in the sky The inverse-square Law: light from stars gets fainter as the inverse square of the distance (brightness proportional to 1/d2). If we know the apparent brightness and the distance to a star we can calculate its absolute (intrinsic) brightness ...
Experience with the Hubble Space Telescope: Twenty Years
... 565 km [13]. During a typical ~96 minute orbit, it will spend most of its time in pointed astronomical observations. This efficiency of ~50% or better was reached during the first 6 years of science operations as improvements were made in how HST was utilized and operated. ...
... 565 km [13]. During a typical ~96 minute orbit, it will spend most of its time in pointed astronomical observations. This efficiency of ~50% or better was reached during the first 6 years of science operations as improvements were made in how HST was utilized and operated. ...
The Milky Way
... 5. What fundamental principle did Shapley use to calibrate the period-luminosity relationship for Cepheid variable stars? a. Light intensity falls off with the inverse square of distance. b. Stars that appear brighter are on average closer to Earth. c. Large pulsating objects have longer periods tha ...
... 5. What fundamental principle did Shapley use to calibrate the period-luminosity relationship for Cepheid variable stars? a. Light intensity falls off with the inverse square of distance. b. Stars that appear brighter are on average closer to Earth. c. Large pulsating objects have longer periods tha ...
CHP 4
... ____ 29. Parallax is the apparent change in location of an object due to the motion of the observer. ____ 30. Both Stonehenge and the Big Horn Medicine Wheel contain alignments that indicate the summer solstice sunrise. ____ 31. Many classical astronomers believed Earth could not move because they d ...
... ____ 29. Parallax is the apparent change in location of an object due to the motion of the observer. ____ 30. Both Stonehenge and the Big Horn Medicine Wheel contain alignments that indicate the summer solstice sunrise. ____ 31. Many classical astronomers believed Earth could not move because they d ...
Astronomy Essay Questions
... process of stellar evolution? Describe and discuss neutron stars. What are they? Describe their physical characteristics. What was the phenomenon that led to their discovery? How are they observed? Where do they fit into the scheme of stellar evolution? Describe and discuss white dwarf stars. What a ...
... process of stellar evolution? Describe and discuss neutron stars. What are they? Describe their physical characteristics. What was the phenomenon that led to their discovery? How are they observed? Where do they fit into the scheme of stellar evolution? Describe and discuss white dwarf stars. What a ...
leiden_duel_des_2008..
... •DES+Stage II combined = Factor 4.6 improvement over Stage II combined •Consistent with DETF range for Stage III DES-like project •Large uncertainties in systematics remain, but FoM is robust to uncertainties in any one probe, and we haven’t made use of all the information ...
... •DES+Stage II combined = Factor 4.6 improvement over Stage II combined •Consistent with DETF range for Stage III DES-like project •Large uncertainties in systematics remain, but FoM is robust to uncertainties in any one probe, and we haven’t made use of all the information ...
Identifying the rotation rate and the presence of dynamic
... observer. For each time series, we perform an autocorrelation analysis. For example, in Figure 3, the black curve shows the autocorrelation as a function of the time lag based on a simulated data series for an Earth without any cloud cover. We assume the i = 90◦ viewing geometry described in §2.2 an ...
... observer. For each time series, we perform an autocorrelation analysis. For example, in Figure 3, the black curve shows the autocorrelation as a function of the time lag based on a simulated data series for an Earth without any cloud cover. We assume the i = 90◦ viewing geometry described in §2.2 an ...
The GMT Consortium Large Earth Finder Sagi Ben-Ami Smithsonian Astrophysical Observatory
... Smithsonian Astrophysical Observatory ...
... Smithsonian Astrophysical Observatory ...
Chapter 16 - Astronomy
... spiral arms; the arms are simply areas where the gas density is greater than at other places. The density waves cause the formation of new stars and glowing emission nebulae. 4. Sound waves are an example of density waves. However, the density waves of a spiral galaxy move slower than the gas partic ...
... spiral arms; the arms are simply areas where the gas density is greater than at other places. The density waves cause the formation of new stars and glowing emission nebulae. 4. Sound waves are an example of density waves. However, the density waves of a spiral galaxy move slower than the gas partic ...
Chapter 15
... 5. What fundamental principle did Shapley use to calibrate the period-luminosity relationship for Cepheid variable stars? a. Light intensity falls off with the inverse square of distance. b. Stars that appear brighter are on average closer to Earth. c. Large pulsating objects have longer periods tha ...
... 5. What fundamental principle did Shapley use to calibrate the period-luminosity relationship for Cepheid variable stars? a. Light intensity falls off with the inverse square of distance. b. Stars that appear brighter are on average closer to Earth. c. Large pulsating objects have longer periods tha ...
Astro-MilkyWay
... 5. What fundamental principle did Shapley use to calibrate the period-luminosity relationship for Cepheid variable stars? a. Light intensity falls off with the inverse square of distance. b. Stars that appear brighter are on average closer to Earth. c. Large pulsating objects have longer periods tha ...
... 5. What fundamental principle did Shapley use to calibrate the period-luminosity relationship for Cepheid variable stars? a. Light intensity falls off with the inverse square of distance. b. Stars that appear brighter are on average closer to Earth. c. Large pulsating objects have longer periods tha ...
Determining the Sizes of Stars Using the HR Diagram
... mass loss causes the star to eject its outer layers, which continue expanding out into space to form a planetary nebulae. For example, a star like the Sun will loose approximately 60% of its mass as it evolves to become a white dwarf. White dwarfs are low in luminosity, because fusion can no longer ...
... mass loss causes the star to eject its outer layers, which continue expanding out into space to form a planetary nebulae. For example, a star like the Sun will loose approximately 60% of its mass as it evolves to become a white dwarf. White dwarfs are low in luminosity, because fusion can no longer ...
International Ultraviolet Explorer
![](https://en.wikipedia.org/wiki/Special:FilePath/International_Ultraviolet_Explorer.gif?width=300)
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.