The Galactic Halo The Galactic Disk Height and Thickness of MW
... Shapley’s Center of the Galaxy " To find the center of the Galaxy, Shapley measured the distance to each cluster using RR Lyrae stars and produced a three dimensional plot of the clusters’ positions. The center of the Galaxy was then identified by the average position of the clusters. " We now know ...
... Shapley’s Center of the Galaxy " To find the center of the Galaxy, Shapley measured the distance to each cluster using RR Lyrae stars and produced a three dimensional plot of the clusters’ positions. The center of the Galaxy was then identified by the average position of the clusters. " We now know ...
New initiatives - Major Instrumentation
... goal and evidence of a viable program. NIO work will advance generally applicable scientific and engineering concepts of general interest. Committed to free and open exchange of information. NIO will maintain all possible options for international ...
... goal and evidence of a viable program. NIO work will advance generally applicable scientific and engineering concepts of general interest. Committed to free and open exchange of information. NIO will maintain all possible options for international ...
Instruction Manual
... ratios (i.e. longer focal ratios), when the observer looks down the focuser tube (without an eyepiece in the focuser), the images of the diagonal mirror, primary mirror, focuser tube and the observer's eye appear centered relative to each other. However, with the short focal ratio primary mirror of ...
... ratios (i.e. longer focal ratios), when the observer looks down the focuser tube (without an eyepiece in the focuser), the images of the diagonal mirror, primary mirror, focuser tube and the observer's eye appear centered relative to each other. However, with the short focal ratio primary mirror of ...
1876—1959 J o h n a u g u... A Biographical Memoir by
... grants from the Carnegie Institution of Washington. Anderson assisted on this project for the year 1907-8. Three joint monographs by Jones and Anderson resulted from this investigation, the most complete account being printed as Publication No. n o of the Carnegie Institution. These investigations w ...
... grants from the Carnegie Institution of Washington. Anderson assisted on this project for the year 1907-8. Three joint monographs by Jones and Anderson resulted from this investigation, the most complete account being printed as Publication No. n o of the Carnegie Institution. These investigations w ...
Glass Mirrors by cold slumping to cover 100 m2 of the MAGIC II
... and detected by appropriate instruments. A typical Cherenkov light flux density between 300 and 600 nm from a 1 TeV gamma shower is around 100 photons/m2, nearly uniformly spread over an area of 50 000 m2 at ground. The faint light flashes must be detected against a substantial night sky light backg ...
... and detected by appropriate instruments. A typical Cherenkov light flux density between 300 and 600 nm from a 1 TeV gamma shower is around 100 photons/m2, nearly uniformly spread over an area of 50 000 m2 at ground. The faint light flashes must be detected against a substantial night sky light backg ...
The Effects of Atmospheric Turbulence on Simulated
... We are primarily interested in the optical methods of detection to provide direct images of the planets. Two techniques have proven promising in selectively attenuating the direct starlight to provide views of planets: coronagraphy and nulling interferometry [10]. Coronagraphy suppresses starlight b ...
... We are primarily interested in the optical methods of detection to provide direct images of the planets. Two techniques have proven promising in selectively attenuating the direct starlight to provide views of planets: coronagraphy and nulling interferometry [10]. Coronagraphy suppresses starlight b ...
Lab 6 - College of San Mateo
... prism table platform so that light from the slit is refracted through the prism, as in the diagram in section IV. The incident ray should make an angle of about 50° to 55° with the normal line, or about 35° to 40° with the face of the prism. (A spectrum may also be seen using light at normal inciden ...
... prism table platform so that light from the slit is refracted through the prism, as in the diagram in section IV. The incident ray should make an angle of about 50° to 55° with the normal line, or about 35° to 40° with the face of the prism. (A spectrum may also be seen using light at normal inciden ...
Pounds K. - X-ray Astronomy and Cosmology group group
... • Cen X-2 brighter and softer than Sco X-1. Tau X-1 also detected. (Cen X-3 not seen) • SL 723 (July 1968) and 724 (April 1969) with largest PCS to date, 2 x 1380 cm2 • spectra of brightest sources ...
... • Cen X-2 brighter and softer than Sco X-1. Tau X-1 also detected. (Cen X-3 not seen) • SL 723 (July 1968) and 724 (April 1969) with largest PCS to date, 2 x 1380 cm2 • spectra of brightest sources ...
Lecture 5
... magnitudes fainter than those that occurred within our galaxy. As a result he was able to come up with a distance estimate of 150,000 parsecs. He became a proponent of the so-called "island universes" hypothesis, which holds that spiral nebulae are actually independent galaxies. The matter was concl ...
... magnitudes fainter than those that occurred within our galaxy. As a result he was able to come up with a distance estimate of 150,000 parsecs. He became a proponent of the so-called "island universes" hypothesis, which holds that spiral nebulae are actually independent galaxies. The matter was concl ...
Slide 1
... magnitudes fainter than those that occurred within our galaxy. As a result he was able to come up with a distance estimate of 150,000 parsecs. He became a proponent of the so-called "island universes" hypothesis, which holds that spiral nebulae are actually independent galaxies. The matter was concl ...
... magnitudes fainter than those that occurred within our galaxy. As a result he was able to come up with a distance estimate of 150,000 parsecs. He became a proponent of the so-called "island universes" hypothesis, which holds that spiral nebulae are actually independent galaxies. The matter was concl ...
Poster
... parameter estimation of the stars for which similar data is presently being obtained from the SEGUE survey, which will obtain spectroscopy for some 250,000 stars chosen to explore the nature of stellar populations throughout the Milky Way. The SDSS-I Value Added Catalog (VAC), which we are in the pr ...
... parameter estimation of the stars for which similar data is presently being obtained from the SEGUE survey, which will obtain spectroscopy for some 250,000 stars chosen to explore the nature of stellar populations throughout the Milky Way. The SDSS-I Value Added Catalog (VAC), which we are in the pr ...
OUR SOLAR SYSTEM
... define a star’s “habitable zone” — a range of orbital distances where liquid water potentially could exist — as a way to identify exoplanets that may be capable of supporting life as we understand it. While we can quibble with the definition — perhaps there’s a biology that uses solvents other than ...
... define a star’s “habitable zone” — a range of orbital distances where liquid water potentially could exist — as a way to identify exoplanets that may be capable of supporting life as we understand it. While we can quibble with the definition — perhaps there’s a biology that uses solvents other than ...
PeliTalk - BiOptic Driving Network
... listening to sounds of neural activity in the cortex, monitored with intracellular electrodes, while changing lenses ...
... listening to sounds of neural activity in the cortex, monitored with intracellular electrodes, while changing lenses ...
The double-degenerate, super-Chandrasekhar nucleus of the
... system seems to have first undergone a phase of mass transfer via wind or stable Roche lobe overflow (RLOF), and then a CE. This is likely, as in order to have two oversized pre-WD stars with R=0.68-0.7 R⊙ still hot, the two events must have happened fast and consecutively. In addition, for the syst ...
... system seems to have first undergone a phase of mass transfer via wind or stable Roche lobe overflow (RLOF), and then a CE. This is likely, as in order to have two oversized pre-WD stars with R=0.68-0.7 R⊙ still hot, the two events must have happened fast and consecutively. In addition, for the syst ...
Chapter 6 Stars
... astronomers can detect X-rays coming from the hot gas and infer that a black hole is present. Similarly, if another star is near a black hole, astronomers can calculate the mass of the black hole from the effect of its gravity on the star. Scientists have detected many star-size black holes with the ...
... astronomers can detect X-rays coming from the hot gas and infer that a black hole is present. Similarly, if another star is near a black hole, astronomers can calculate the mass of the black hole from the effect of its gravity on the star. Scientists have detected many star-size black holes with the ...
Science Jeopardy
... that the Hubble Space Telescope has over all ground-based telescopes. • QUESTION: What is it is not affected by the Earth’s atmosphere? ...
... that the Hubble Space Telescope has over all ground-based telescopes. • QUESTION: What is it is not affected by the Earth’s atmosphere? ...
Milky Way
... Simple Winding – The Wrong Theory •Spiral arms wind up in one cycle •20 cycles since beginning of galaxy •Something else is going on ...
... Simple Winding – The Wrong Theory •Spiral arms wind up in one cycle •20 cycles since beginning of galaxy •Something else is going on ...
Science Jeopardy
... that the Hubble Space Telescope has over all ground-based telescopes. • QUESTION: What is it is not affected by the Earth’s atmosphere? ...
... that the Hubble Space Telescope has over all ground-based telescopes. • QUESTION: What is it is not affected by the Earth’s atmosphere? ...
Te lescopes - Astromedia AB
... AZ Models These high quality altazimuth refractors are an excellent choice for the more serious beginning astronomer or terrestrial observer who wants a little more pleasure and fun than available from standard size 60mm models. These powerful optical instruments have 100 times the light gathering a ...
... AZ Models These high quality altazimuth refractors are an excellent choice for the more serious beginning astronomer or terrestrial observer who wants a little more pleasure and fun than available from standard size 60mm models. These powerful optical instruments have 100 times the light gathering a ...
The Cosmic Perspective Other Planetary Systems: The New Science
... c) These gas giants formed far from the star and migrated inward due to gas drag in the nebula. d) These gas giants formed far from the star and migrated inward due to the effects of waves in the nebula. e) These gas giants formed from a star, and then were captured by another star in a much clos ...
... c) These gas giants formed far from the star and migrated inward due to gas drag in the nebula. d) These gas giants formed far from the star and migrated inward due to the effects of waves in the nebula. e) These gas giants formed from a star, and then were captured by another star in a much clos ...
JSP-Spr-2015-New Directions for Pluto From Clyde Tombaugh
... moving object, such as a planet, would appear to jump from one position to another, while the more distant objects such as stars would appear stationary. Tombaugh noticed such a moving object in his search, near the place predicted by Lowell, and subsequent observations showed it to have an orbit be ...
... moving object, such as a planet, would appear to jump from one position to another, while the more distant objects such as stars would appear stationary. Tombaugh noticed such a moving object in his search, near the place predicted by Lowell, and subsequent observations showed it to have an orbit be ...
SOFIA`s Invisible Universe - Deutsches SOFIA Institut
... The conditions for the astronomers onboard were very cramped and they had to wear pressure suits plus respirator masks. However, their investigations were very successful. They discovered that the radiation emitted from Jupiter and Saturn in the infrared range is more than what they absorb from the ...
... The conditions for the astronomers onboard were very cramped and they had to wear pressure suits plus respirator masks. However, their investigations were very successful. They discovered that the radiation emitted from Jupiter and Saturn in the infrared range is more than what they absorb from the ...
Evidence for micrometeoroid damage in the pn
... This is roughly 108 times more than we would expect the detector through the X-ray mirror system. This is not from a 6 MeV alpha particle and about 106 more than possible on straight paths but by scattering at the miran iron atom of 1 GeV (see Bragg curves simulated with ror surface. In principle, a ...
... This is roughly 108 times more than we would expect the detector through the X-ray mirror system. This is not from a 6 MeV alpha particle and about 106 more than possible on straight paths but by scattering at the miran iron atom of 1 GeV (see Bragg curves simulated with ror surface. In principle, a ...
How do stars orbit in our galaxy?
... • How does our galaxy recycle gas into stars? • Stars are born from the gravitational collapse of gas clumps in molecular clouds. Near the ends of their lives, stars more massive than our Sun create elements heavier than hydrogen and helium and expel them into space via supernovae and stellar winds. ...
... • How does our galaxy recycle gas into stars? • Stars are born from the gravitational collapse of gas clumps in molecular clouds. Near the ends of their lives, stars more massive than our Sun create elements heavier than hydrogen and helium and expel them into space via supernovae and stellar winds. ...
Chapter 1 Seeing the Light: The Art and Science of Astronomy
... and labels the individual stars α, β, and so on. When you read about a star in a list of objects to observe, say, in an astronomy magazine (see Chapter 2), you probably won’t see it listed in the style of Alpha Canis Majoris or even α Canis Majoris. Instead, to save space, the magazine prints it as ...
... and labels the individual stars α, β, and so on. When you read about a star in a list of objects to observe, say, in an astronomy magazine (see Chapter 2), you probably won’t see it listed in the style of Alpha Canis Majoris or even α Canis Majoris. Instead, to save space, the magazine prints it as ...
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.