Galaxies
... observe because they are located behind the center of the Milky Way, which obscures our view. ...
... observe because they are located behind the center of the Milky Way, which obscures our view. ...
A Star - Cloudy Nights
... these stars are double stars themselves. So, this is a four star system which is 180 light years away. The two brighter stars revolve around each other once every 1165 years. Beta Monoceros is an example of a triple star system. All three stars are of equal brightness and form a narrow triangle in ...
... these stars are double stars themselves. So, this is a four star system which is 180 light years away. The two brighter stars revolve around each other once every 1165 years. Beta Monoceros is an example of a triple star system. All three stars are of equal brightness and form a narrow triangle in ...
Detection of the Stochastic Background of nHz Gravitational Radiation from Massive Black
... • Sagittarius A* – Black Hole with mass of 4 million Suns (Ms) in the center of our Milky Way galaxy. • NGC 4258 – mass of 30 million Ms, similar to many nearby galaxies. • Quasars and “Active” Galaxies – jets formed by poorly understood processes; masses up to a few billion Ms. 2003 Summer School, ...
... • Sagittarius A* – Black Hole with mass of 4 million Suns (Ms) in the center of our Milky Way galaxy. • NGC 4258 – mass of 30 million Ms, similar to many nearby galaxies. • Quasars and “Active” Galaxies – jets formed by poorly understood processes; masses up to a few billion Ms. 2003 Summer School, ...
Lecture ppt - UCO/Lick Observatory
... bonded together with array of electrodes between them. Front surface acts as mirror. Page 12 ...
... bonded together with array of electrodes between them. Front surface acts as mirror. Page 12 ...
here - Ira-Inaf
... (Wouterloot et al., 1988; Kobayashi and Tokunaga, 2000; Santos et al., 2000; Brand and Wouterloot, 2007). Thus it is likely that hundreds, if not thousands, of planetary systems should be present even at these large distances from the Galactic Center. The above studies of the outer Galaxy have been ...
... (Wouterloot et al., 1988; Kobayashi and Tokunaga, 2000; Santos et al., 2000; Brand and Wouterloot, 2007). Thus it is likely that hundreds, if not thousands, of planetary systems should be present even at these large distances from the Galactic Center. The above studies of the outer Galaxy have been ...
R585 EXPLORERS OF THE SOUTHERN SKY
... for their scientific themes and their beauty, this collection includes every kind of known object in the universe: planets, stars, swirling clouds of gas, wheeling galaxies, and remote quasars and active galaxies. This representation selection is carefully chosen to show the power of the telescope a ...
... for their scientific themes and their beauty, this collection includes every kind of known object in the universe: planets, stars, swirling clouds of gas, wheeling galaxies, and remote quasars and active galaxies. This representation selection is carefully chosen to show the power of the telescope a ...
Transparencies - Rencontres de Moriond
... Brookhaven National Laboratory Harvard-Smithsonian Center for Astrophysics Johns Hopkins University Las Cumbres Observatory Lawrence Livermore National Laboratory National Optical Astronomy Observatory Ohio State University Pennsylvania State University Research Corporation Stanford Linear Accelerat ...
... Brookhaven National Laboratory Harvard-Smithsonian Center for Astrophysics Johns Hopkins University Las Cumbres Observatory Lawrence Livermore National Laboratory National Optical Astronomy Observatory Ohio State University Pennsylvania State University Research Corporation Stanford Linear Accelerat ...
Hubble 2006: Science Year in Review
... and prolong its life as humankind’s most productive scientific instrument. With successful servicing, Hubble will be at its all-time peak performance, with instruments many times more sensitive than the original set launched with the observatory in 1990. Meanwhile, Hubble continues to produce great ...
... and prolong its life as humankind’s most productive scientific instrument. With successful servicing, Hubble will be at its all-time peak performance, with instruments many times more sensitive than the original set launched with the observatory in 1990. Meanwhile, Hubble continues to produce great ...
A History of Star Catalogues - The Albuquerque Astronomical Society
... azimuthal quadrant, two meters in radius, that had belonged to Krüger. He built several more instruments, but was not happy with their accuracy until he designed a nine foot radius sextant. Altogether he had more than a dozen different instruments. He checked the accuracy of his measurements by repe ...
... azimuthal quadrant, two meters in radius, that had belonged to Krüger. He built several more instruments, but was not happy with their accuracy until he designed a nine foot radius sextant. Altogether he had more than a dozen different instruments. He checked the accuracy of his measurements by repe ...
The composition and nature of the dust shell surrounding the binary
... For a description of flux and wavelength calibration procedures, we refer to Schaeidt et al. (1996) and Valentijn et al. (1996). In the reduction process the calibration files available in April 1998 were used. Judging from the overlap regions of the different sub-bands, further improvement is still ...
... For a description of flux and wavelength calibration procedures, we refer to Schaeidt et al. (1996) and Valentijn et al. (1996). In the reduction process the calibration files available in April 1998 were used. Judging from the overlap regions of the different sub-bands, further improvement is still ...
The science case for - Astrophysics
... some exotic stuff, unlike what we are made of, not yet detected directly, but whose weight controls the movements of stars in our Galaxy. This ‘dark matter’ or ‘unseen mass’, whatever it is made of, is five times more abundant than are the types of matter ...
... some exotic stuff, unlike what we are made of, not yet detected directly, but whose weight controls the movements of stars in our Galaxy. This ‘dark matter’ or ‘unseen mass’, whatever it is made of, is five times more abundant than are the types of matter ...
Report from the Subaru Telescope for External
... Observations of Lyα selected galaxies, also known as Lyα emitters (LAEs), have indicated that the Lyα luminosity functions (LFs) of LAEs do not evolve between z = 3.1 and z = 5.7. In contrast, the Lyα luminosity of LAEs does evolve at z > 6 (e.g., Ouchi et al. 2010; Kashikawa et al. 2011). This evol ...
... Observations of Lyα selected galaxies, also known as Lyα emitters (LAEs), have indicated that the Lyα luminosity functions (LFs) of LAEs do not evolve between z = 3.1 and z = 5.7. In contrast, the Lyα luminosity of LAEs does evolve at z > 6 (e.g., Ouchi et al. 2010; Kashikawa et al. 2011). This evol ...
Characterization and Subtraction of Well
... 1996). Coronagraphic imaging permits investigation between these extremes, but the sensitivity of this technique depends greatly on atmospheric seeing conditions (Nakajima et al. ...
... 1996). Coronagraphic imaging permits investigation between these extremes, but the sensitivity of this technique depends greatly on atmospheric seeing conditions (Nakajima et al. ...
The ISO–SWS Spectrum of Planetary Nebula NGC 7027
... (I < 5, where I is in 10−12 erg cm−2 s−1 ) have estimated errors of about 20%, intermediate lines (5 < I < 10) of about 10%, while the strongest lines (I > 10), have normally less than 5% uncertainty. All the lines follow this behavior with the exception of the S III line at 33.5 µm with a measured ...
... (I < 5, where I is in 10−12 erg cm−2 s−1 ) have estimated errors of about 20%, intermediate lines (5 < I < 10) of about 10%, while the strongest lines (I > 10), have normally less than 5% uncertainty. All the lines follow this behavior with the exception of the S III line at 33.5 µm with a measured ...
Issue #8 - 2014 July - National Space Society
... http://www.nasa.gov/press/2014/may/nasa-and-industry-complete-first-phase-to-certify-newcrew-transportation-systems/ May 30, 2014 - NASA's Commercial Crew Program and industry have completed the first step in the certification process that will enable American-made commercial spacecraft safely to fe ...
... http://www.nasa.gov/press/2014/may/nasa-and-industry-complete-first-phase-to-certify-newcrew-transportation-systems/ May 30, 2014 - NASA's Commercial Crew Program and industry have completed the first step in the certification process that will enable American-made commercial spacecraft safely to fe ...
Debris Disks: Seeing Dust, Thinking of Planetesimals and Planets
... As the very name “debris disks” suggests, they should incessantly produce “collisional debris”, so that destructive collisions must be a dominant process operating in these systems. For collisions to be destructive — and even to occur at sufficient rates – a certain minimum level of relative velocit ...
... As the very name “debris disks” suggests, they should incessantly produce “collisional debris”, so that destructive collisions must be a dominant process operating in these systems. For collisions to be destructive — and even to occur at sufficient rates – a certain minimum level of relative velocit ...
A Comet-Hunter`s Legacy -
... death -- which is violently blowing huge amounts of gas and dust out of the galaxy, causing the fuzzy blurring near its center, and emitting huge amounts of radiation, all the way from the infrared, to the X-ray region. Each hundred-million year passage will probably bring the two galaxies closer to ...
... death -- which is violently blowing huge amounts of gas and dust out of the galaxy, causing the fuzzy blurring near its center, and emitting huge amounts of radiation, all the way from the infrared, to the X-ray region. Each hundred-million year passage will probably bring the two galaxies closer to ...
Deformable Mirrors Lecture 8
... bonded together with array of electrodes between them. Front surface acts as mirror. Page 10 ...
... bonded together with array of electrodes between them. Front surface acts as mirror. Page 10 ...
A search for a new class of pulsating DA white dwarf stars in the DB
... observable amplitudes. There have been few searches for pulsation in DA white dwarfs of this temperature. Therefore, we have begun a survey to try to find the predicted new class of pulsating stars, stars that have DA atmospheres, but are structurally close to the known DBV (DB variable) pulsating s ...
... observable amplitudes. There have been few searches for pulsation in DA white dwarfs of this temperature. Therefore, we have begun a survey to try to find the predicted new class of pulsating stars, stars that have DA atmospheres, but are structurally close to the known DBV (DB variable) pulsating s ...
Diffraction-limited astronomical X-ray imaging and X
... Because the reflectance near normal incidence of even the best optical materials is exceedingly small in the Xray band, the traditional approach towards the construction of astronomical X-ray telescopes uses mirrors that operate at grazing incidence, below the so-called ‘critical angle’ for total ex ...
... Because the reflectance near normal incidence of even the best optical materials is exceedingly small in the Xray band, the traditional approach towards the construction of astronomical X-ray telescopes uses mirrors that operate at grazing incidence, below the so-called ‘critical angle’ for total ex ...
McDonald I....Tisserand, P. et al ExELS an
... A number of statistical studies using different techniques have recently derived first robust constraints on the frequency of exoplanets for different ranges of masses and orbital separations (e.g. Cumming et al. 2008; Gould et al. 2010; Borucki et al. 2011; Mayor et al. 2011; Cassan et al. 2012; Ho ...
... A number of statistical studies using different techniques have recently derived first robust constraints on the frequency of exoplanets for different ranges of masses and orbital separations (e.g. Cumming et al. 2008; Gould et al. 2010; Borucki et al. 2011; Mayor et al. 2011; Cassan et al. 2012; Ho ...
Document
... Comparison of predicted NGS focus with actual focus gives Sodium term AO for ELT – Paris, 22-26 June 2009 ...
... Comparison of predicted NGS focus with actual focus gives Sodium term AO for ELT – Paris, 22-26 June 2009 ...
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.