A Comment on “The Far Future of Exoplanet Direct Characterization
... even larger than the largest inferred from the spacecraft dust detectors (of the order of 40µm in size) may have been detected by meteor radar observations (e.g., Baggaley, 2000; Krüger and Grün, 2009), and the possibility of colliding with even larger particles over the course of a voyage of severa ...
... even larger than the largest inferred from the spacecraft dust detectors (of the order of 40µm in size) may have been detected by meteor radar observations (e.g., Baggaley, 2000; Krüger and Grün, 2009), and the possibility of colliding with even larger particles over the course of a voyage of severa ...
Reflecting `Popular Culture`: The Introduction, Diffusion, and
... parabolic concave mirror made of metal with a smaller one, this time elliptical. In theory, this combination of mirrors gave a focused image in front of the main mirror. However, the practical construction of the instrument floundered on insurmountable problems.8 Therefore, Newton chose a simpler de ...
... parabolic concave mirror made of metal with a smaller one, this time elliptical. In theory, this combination of mirrors gave a focused image in front of the main mirror. However, the practical construction of the instrument floundered on insurmountable problems.8 Therefore, Newton chose a simpler de ...
Physics of the Interstellar Medium
... optically thin neutral gas phases into a nonlinear mixture of interacting gas components with strong departures from thermal equilibrium. This paradigm shift has been a major break-through that attracted enormous interest and that made ISM physics a major astrophysical research topic, not only in Ge ...
... optically thin neutral gas phases into a nonlinear mixture of interacting gas components with strong departures from thermal equilibrium. This paradigm shift has been a major break-through that attracted enormous interest and that made ISM physics a major astrophysical research topic, not only in Ge ...
T1000311-v7 TMS Hazards Analysis - DCC
... The Transmission Monitor Suspension (TMS) is an in-vacuum component that is located behind the ETM (End Test Mass) and is mounted to the internal seismic isolation (ISI) optics platform inside the BSC, as shown in Figure 1. The TMS consists of three sub-assemblies: 1) suspension frame and top mass w ...
... The Transmission Monitor Suspension (TMS) is an in-vacuum component that is located behind the ETM (End Test Mass) and is mounted to the internal seismic isolation (ISI) optics platform inside the BSC, as shown in Figure 1. The TMS consists of three sub-assemblies: 1) suspension frame and top mass w ...
JENAM-2011 Book of abstracts
... motions, essentially free of systematic errors, but also the largest single improvement factor in the subject’s long history, exceeding even that achieved by Tycho Brahe himself. I will summarise the fundamental principles of the measurement concept, and provide some topical examples of the scientifi ...
... motions, essentially free of systematic errors, but also the largest single improvement factor in the subject’s long history, exceeding even that achieved by Tycho Brahe himself. I will summarise the fundamental principles of the measurement concept, and provide some topical examples of the scientifi ...
POSTERS SESSION I: Atmospheres of Massive Stars
... I-7. Propagating Waves in Hot-Star Winds: Leakage of Long-Period Pulsations Steven R. Cranmer, Harvard-Smithsonian Center for Astrophysics Massive stars have strong stellar winds that exhibit variability on timescales ranging from hours to years. Many classes of these stars are also seen, via photom ...
... I-7. Propagating Waves in Hot-Star Winds: Leakage of Long-Period Pulsations Steven R. Cranmer, Harvard-Smithsonian Center for Astrophysics Massive stars have strong stellar winds that exhibit variability on timescales ranging from hours to years. Many classes of these stars are also seen, via photom ...
5. System Engineering
... It also provides a realistic set of disturbances (see section 5.4) and hardware to be implemented into the integrated modelling (see section 5.3.3). Phase B - The Physical Design to be performed during Phase B shall elaborate, to a higher level of details, on the work performed during Phase A. Optim ...
... It also provides a realistic set of disturbances (see section 5.4) and hardware to be implemented into the integrated modelling (see section 5.3.3). Phase B - The Physical Design to be performed during Phase B shall elaborate, to a higher level of details, on the work performed during Phase A. Optim ...
The Milky Way as a galaxy
... vector of the star cluster. In other words, the direction vector of the stars is such that they are all moving towards the convergence point. Thus, nconv (and hence v=jvj) can be measured from the direction of the proper motions of the stars in the cluster. On the other hand, one component of v can ...
... vector of the star cluster. In other words, the direction vector of the stars is such that they are all moving towards the convergence point. Thus, nconv (and hence v=jvj) can be measured from the direction of the proper motions of the stars in the cluster. On the other hand, one component of v can ...
Stellarium User Guide - Skolekonsulenterne.dk
... planetarium. It will calculate the positions of the Sun and Moon, planets and stars, and draw how the sky would look to an observer depending on their location and the time. It can also draw the constellations and simulate astronomical phenomena such as meteor showers, and solar or lunar eclipses. S ...
... planetarium. It will calculate the positions of the Sun and Moon, planets and stars, and draw how the sky would look to an observer depending on their location and the time. It can also draw the constellations and simulate astronomical phenomena such as meteor showers, and solar or lunar eclipses. S ...
Hubble Deep Field Academy -- Overview
... description, the concepts covered, prerequisites, and the target audience. Science Background: Provides information about the science behind the activity. It clarifies important concepts used in the activity and contains a message from the scientist who worked with the team to develop it. Lesson Pla ...
... description, the concepts covered, prerequisites, and the target audience. Science Background: Provides information about the science behind the activity. It clarifies important concepts used in the activity and contains a message from the scientist who worked with the team to develop it. Lesson Pla ...
TECHNICAL REPORT
... The Mid-Infrared Instrument (MIRI) on JWST is designed to obtain 5.6 - 25.5 µm images with a plate scale of 110 mas pix-1 and 5 - 14 µm low-resolution spectra of the most distant galaxies in the Universe, to study the formation of the first galaxies. As a result, MIRI is extremely sensitive and satu ...
... The Mid-Infrared Instrument (MIRI) on JWST is designed to obtain 5.6 - 25.5 µm images with a plate scale of 110 mas pix-1 and 5 - 14 µm low-resolution spectra of the most distant galaxies in the Universe, to study the formation of the first galaxies. As a result, MIRI is extremely sensitive and satu ...
How We See The Sky
... Diffraction places a limit on the resolution of an optical system. As detail becomes smaller, diffraction has a proportionally stronger “smearing” effect (failure to fully “transfer” scene contrast), diminishing the ability of the optical system to resolve fine detail. High MTF at low contrast level ...
... Diffraction places a limit on the resolution of an optical system. As detail becomes smaller, diffraction has a proportionally stronger “smearing” effect (failure to fully “transfer” scene contrast), diminishing the ability of the optical system to resolve fine detail. High MTF at low contrast level ...
ATTENTION: Epreuve non définitive!!!
... for observed irregularities and determined a position based on an orbit in the ecliptic plane and Bode’s Law that suggested a radius twice that of Uranus. In his third memoir, read on 31 August 1846, le Verrier gave more precise limits within which one should look for the new planet and even predict ...
... for observed irregularities and determined a position based on an orbit in the ecliptic plane and Bode’s Law that suggested a radius twice that of Uranus. In his third memoir, read on 31 August 1846, le Verrier gave more precise limits within which one should look for the new planet and even predict ...
normal and active - FirstLight Astro
... 6. What’s different about the galaxies we see far away and long ago? ...
... 6. What’s different about the galaxies we see far away and long ago? ...
Understanding the Astrophysics of Galaxy Evolution: the role of
... forming stars very rapidly, and that supernovae were driving significant outflows. Since then, the race to claim the record for the highest redshift object has absorbed many in the field. Today, this record stands at z = 6.96. These distant objects appear as tiny smudges in the deepest HST imaging d ...
... forming stars very rapidly, and that supernovae were driving significant outflows. Since then, the race to claim the record for the highest redshift object has absorbed many in the field. Today, this record stands at z = 6.96. These distant objects appear as tiny smudges in the deepest HST imaging d ...
Galaxies
... a. contain a large number of very young stars, but very little evidence of gas clouds. b. contain a large number of very old stars and almost no gas or dust. c. are often associated with a galaxy that is colliding with another galaxy. d. are common in rich clusters. e. are composed of filaments and ...
... a. contain a large number of very young stars, but very little evidence of gas clouds. b. contain a large number of very old stars and almost no gas or dust. c. are often associated with a galaxy that is colliding with another galaxy. d. are common in rich clusters. e. are composed of filaments and ...
A Sixty-Year Timeline of the Air Force Maui Optical and
... This document contains a timeline of key events in the history of the Air Force Maui Optical and Supercomputing Site (AMOS). AMOS is located on the island of Maui, Hawaii, and is comprised of two physically separate facilities: the Maui Space Surveillance Complex (MSSC) located on the top of the Hal ...
... This document contains a timeline of key events in the history of the Air Force Maui Optical and Supercomputing Site (AMOS). AMOS is located on the island of Maui, Hawaii, and is comprised of two physically separate facilities: the Maui Space Surveillance Complex (MSSC) located on the top of the Hal ...
ASI 2017 Abstract Book - Astronomical Society of India
... One of the most outstanding challenges in extragalactic astronomy is to identify the astrophysical processes responsible for transforming simple dark matter haloes into the heterogenous population of galaxies inhabiting today's Universe. How did different morphological types form and evolve? Does th ...
... One of the most outstanding challenges in extragalactic astronomy is to identify the astrophysical processes responsible for transforming simple dark matter haloes into the heterogenous population of galaxies inhabiting today's Universe. How did different morphological types form and evolve? Does th ...
Asteroid Rotation Periods
... Pallas to be larger than 219 Alice and that larger than 4.179 Toutatis). Although the best way to study an asteroid is by in situ measurements –ie by a spacecraft, this is very expensive and therefore only a small number of asteroids can be studied this way. However there are quite a few studies tha ...
... Pallas to be larger than 219 Alice and that larger than 4.179 Toutatis). Although the best way to study an asteroid is by in situ measurements –ie by a spacecraft, this is very expensive and therefore only a small number of asteroids can be studied this way. However there are quite a few studies tha ...
Galileo, my first term paper
... turned his telescope on the night sky and began to make remarkable discoveries. In about two months he made more discoveries that changed the world than anyone has ever made before or since. ...
... turned his telescope on the night sky and began to make remarkable discoveries. In about two months he made more discoveries that changed the world than anyone has ever made before or since. ...
PPT
... parallax measurements that build on radar ranging in our solar system – Using parallax and the relationship between luminosity, distance, and brightness, we can calibrate a series of standard candles – We can measure distances greater than 10 billion light years using white dwarf supernovae as stand ...
... parallax measurements that build on radar ranging in our solar system – Using parallax and the relationship between luminosity, distance, and brightness, we can calibrate a series of standard candles – We can measure distances greater than 10 billion light years using white dwarf supernovae as stand ...
Spitzer Space Telescope
The Spitzer Space Telescope (SST), formerly the Space Infrared Telescope Facility (SIRTF), is an infrared space observatory launched in 2003. It is the fourth and final of the NASA Great Observatories program.The planned mission period was to be 2.5 years with a pre-launch expectation that the mission could extend to five or slightly more years until the onboard liquid helium supply was exhausted. This occurred on 15 May 2009. Without liquid helium to cool the telescope to the very low temperatures needed to operate, most of the instruments are no longer usable. However, the two shortest-wavelength modules of the IRAC camera are still operable with the same sensitivity as before the cryogen was exhausted, and will continue to be used in the Spitzer Warm Mission. All Spitzer data, from both the primary and warm phases, are archived at the Infrared Science Archive (IRSA).In keeping with NASA tradition, the telescope was renamed after its successful demonstration of operation, on 18 December 2003. Unlike most telescopes that are named after famous deceased astronomers by a board of scientists, the new name for SIRTF was obtained from a contest open to the general public.The contest led to the telescope being named in honor of astronomer Lyman Spitzer, who had promoted the concept of space telescopes in the 1940s. Spitzer wrote a 1946 report for RAND Corporation describing the advantages of an extraterrestrial observatory and how it could be realized with available or upcoming technology. He has been cited for his pioneering contributions to rocketry and astronomy, as well as ""his vision and leadership in articulating the advantages and benefits to be realized from the Space Telescope Program.""The US$800 million Spitzer was launched from Cape Canaveral Air Force Station, on a Delta II 7920H ELV rocket, Monday, 25 August 2003 at 13:35:39 UTC-5 (EDT).It follows a heliocentric instead of geocentric orbit, trailing and drifting away from Earth's orbit at approximately 0.1 astronomical unit per year (a so-called ""earth-trailing"" orbit). The primary mirror is 85 centimeters (33 in) in diameter, f/12, made of beryllium and is cooled to 5.5 K (−449.77 °F). The satellite contains three instruments that allow it to perform astronomical imaging and photometry from 3 to 180 micrometers, spectroscopy from 5 to 40 micrometers, and spectrophotometry from 5 to 100 micrometers.