Spectroscopic confirmation of a galaxy at redshift z=8.6
... elements), a mass distribution either similar to that of massive stars in local galaxies or with only very massive stars18, and ages between 10 and 100 Myr (but perhaps as old as 300 Myr (ref. 19)). Considering this range of mass distributions, metallicities and ages, we estimate the star formation ...
... elements), a mass distribution either similar to that of massive stars in local galaxies or with only very massive stars18, and ages between 10 and 100 Myr (but perhaps as old as 300 Myr (ref. 19)). Considering this range of mass distributions, metallicities and ages, we estimate the star formation ...
electronic imaging in
... emulsion for a long period of time. It is therefore called an "integrating" detector. The eye cannot do this to any significant extent. Moreover, the plate provides a permanent record which may be saved for future comparison and study by others. By using a photographic plate as the recording device ...
... emulsion for a long period of time. It is therefore called an "integrating" detector. The eye cannot do this to any significant extent. Moreover, the plate provides a permanent record which may be saved for future comparison and study by others. By using a photographic plate as the recording device ...
DIY Astronomy – Electronic Telescope Focuser
... Could I be a part of the ultra Cool Guy Astronomers? ...
... Could I be a part of the ultra Cool Guy Astronomers? ...
09 03 07 Logic Outline - The National Academies of Sciences
... be more expensive than dedicated telescopes to purchase, and certainly are more expensive to operate and maintain. The initial cost of a general purpose telescope at a major observatory, while it can be considerable, is typically much smaller than the long run operation and maintenance (O&M) costs o ...
... be more expensive than dedicated telescopes to purchase, and certainly are more expensive to operate and maintain. The initial cost of a general purpose telescope at a major observatory, while it can be considerable, is typically much smaller than the long run operation and maintenance (O&M) costs o ...
Lab Manual part 2
... d. Altitude axis and lock. The whole mount (everything but the tripod) can move on a third axis. This determines the “altitude” of the main axis of the telescope mount, i.e. the angle above the horizon (or above the level) that the axis points. Except for the initial alignment of the mount with the ...
... d. Altitude axis and lock. The whole mount (everything but the tripod) can move on a third axis. This determines the “altitude” of the main axis of the telescope mount, i.e. the angle above the horizon (or above the level) that the axis points. Except for the initial alignment of the mount with the ...
20225_TerraStar60 InstrctnMnl 042111.qxd
... Spend several nights observing the Moon. Some nights, the Moon is so bright that it makes other objects in the sky difficult to see. These are nights that are excellent for lunar observation. ...
... Spend several nights observing the Moon. Some nights, the Moon is so bright that it makes other objects in the sky difficult to see. These are nights that are excellent for lunar observation. ...
distance
... We see distant galaxies as young galaxies: looking back in time to learn what galaxies were like when they were young. ...
... We see distant galaxies as young galaxies: looking back in time to learn what galaxies were like when they were young. ...
Autostar Manual
... This Instruction Manual begins by explaining the operation of Autostar in sequence from turning on power to locating the first object in the sky. The telescope and manual should be used together to complete this important series of operations. The balance of the manual is a reference for additional ...
... This Instruction Manual begins by explaining the operation of Autostar in sequence from turning on power to locating the first object in the sky. The telescope and manual should be used together to complete this important series of operations. The balance of the manual is a reference for additional ...
Introduction - Arecibo Observatory
... slow slew rates (24o/min in azimuth, 2o.4 /min in zenith angle.) Hence, in a typical nodding-style, phase-referenced observation, where the calibrator could be located 3o or more from the target, a significant amount of observing time, often ≥ 50 %, is wasted slewing between the two sources, leading ...
... slow slew rates (24o/min in azimuth, 2o.4 /min in zenith angle.) Hence, in a typical nodding-style, phase-referenced observation, where the calibrator could be located 3o or more from the target, a significant amount of observing time, often ≥ 50 %, is wasted slewing between the two sources, leading ...
What Makes a Failure? Designing a New National Telescope, 1975
... The most significant change on the institutional landscape of astronomy after the Second World War was the establishment of national observatory facilities making telescopes available to the entire American astronomical community. Prior to this, only a few telescopes were federally funded and operat ...
... The most significant change on the institutional landscape of astronomy after the Second World War was the establishment of national observatory facilities making telescopes available to the entire American astronomical community. Prior to this, only a few telescopes were federally funded and operat ...
Celestron Manual
... To focus your Travel Scope turn the focus knob located near the rear of the telescope (see Figure 1-1). Turning the knob counterclockwise allows you to focus on an object that is farther than the one you are currently observing. Turning the knob clockwise from you allows you to focus on an object cl ...
... To focus your Travel Scope turn the focus knob located near the rear of the telescope (see Figure 1-1). Turning the knob counterclockwise allows you to focus on an object that is farther than the one you are currently observing. Turning the knob clockwise from you allows you to focus on an object cl ...
Series Telescopes INSTRUCTION MANUAL
... providing much more light-gathering power for the money spent. Because the light path is intercepted and reflected out to the side, you can have focal lengths up to 1000mm and still enjoy a telescope that is relatively compact and portable. A Newtonian Reflector telescope offers such impressive ligh ...
... providing much more light-gathering power for the money spent. Because the light path is intercepted and reflected out to the side, you can have focal lengths up to 1000mm and still enjoy a telescope that is relatively compact and portable. A Newtonian Reflector telescope offers such impressive ligh ...
The venerable craft of telescope mirror grinding takes on a
... mirror-making, with the aid of some advanced techniques, has changed. Mirrors have improved, but some of the Zen has gone out of their crafting. The optical shop at the Kitt Peak National Observatory in Tucson—where mirror blanks become optical surfaces for Earth-bound and orbiting observatories—mig ...
... mirror-making, with the aid of some advanced techniques, has changed. Mirrors have improved, but some of the Zen has gone out of their crafting. The optical shop at the Kitt Peak National Observatory in Tucson—where mirror blanks become optical surfaces for Earth-bound and orbiting observatories—mig ...
Polarimetry with the Southern African Large Telescope
... – Capability to react quickly to events, but restricted viewing window ...
... – Capability to react quickly to events, but restricted viewing window ...
A Telescope Operating Manual
... This booklet is a handbook for the use of the lab telescopes. In it you should find all the information necessary to become an expert in operating the lab telescopes. Read it more than once and review it each week before lab. Bring copies of any useful pages to lab until you are comfortable working ...
... This booklet is a handbook for the use of the lab telescopes. In it you should find all the information necessary to become an expert in operating the lab telescopes. Read it more than once and review it each week before lab. Bring copies of any useful pages to lab until you are comfortable working ...
ICSO_NIRSpec optics development_v2
... by Ariane V and the Near InfraRed Spectrograph (NIRSpec). The prime contractor of this instrument is EADS Astrium in Ottobrunn, Germany and, thanks to its 10 years experience in SiC mirrors manufacturing, Sagem has been awarded the contract for the polishing, coating, integration and qualification o ...
... by Ariane V and the Near InfraRed Spectrograph (NIRSpec). The prime contractor of this instrument is EADS Astrium in Ottobrunn, Germany and, thanks to its 10 years experience in SiC mirrors manufacturing, Sagem has been awarded the contract for the polishing, coating, integration and qualification o ...
Analytical expressions for field astigmatism in decentered two mirror
... decentered system the image of an object in the field center is not in the mechanical center of the adapter, where the instruments are located. For all measurements in the telescope, the practical field center is the center of the adapter. The evaluation of the measurements of field astigmatism has ...
... decentered system the image of an object in the field center is not in the mechanical center of the adapter, where the instruments are located. For all measurements in the telescope, the practical field center is the center of the adapter. The evaluation of the measurements of field astigmatism has ...
Axial Resolution of Adaptive Optics Scanning Laser
... Indirect detection of more than 100 planets via radial velocity measurements is one of the most important astronomical developments of the past decade. Direct imaging of extrasolar planets — seeing photons they emit or reflect — is the next major step, allowing us to potentially detect giant planets ...
... Indirect detection of more than 100 planets via radial velocity measurements is one of the most important astronomical developments of the past decade. Direct imaging of extrasolar planets — seeing photons they emit or reflect — is the next major step, allowing us to potentially detect giant planets ...
Infinity 60AZ and 70AZ Manual
... contrast of the planets. Meade offers a line of inexpensive color filters. What’s Next? Beyond the Solar System: Once you have observed our own system of planets, it’s time to really travel far from home and look at stars and other objects. You can observe thousands of stars with your telescope. At ...
... contrast of the planets. Meade offers a line of inexpensive color filters. What’s Next? Beyond the Solar System: Once you have observed our own system of planets, it’s time to really travel far from home and look at stars and other objects. You can observe thousands of stars with your telescope. At ...
Sodium D-line Splitting
... the diffraction pattern consists of diffraction modulated interference fringes. The quantity (e+b) is called the grating element and N (= 1/ (e+b)) is the number of slits per unit length, which could typically be 300 to 12000 lines per inch. For a large number of slits, the diffraction pattern consi ...
... the diffraction pattern consists of diffraction modulated interference fringes. The quantity (e+b) is called the grating element and N (= 1/ (e+b)) is the number of slits per unit length, which could typically be 300 to 12000 lines per inch. For a large number of slits, the diffraction pattern consi ...
PowerSeeker 80 EQ Manual
... If you wear corrective lenses (specifically glasses), you may want to remove them when observing with an eyepiece attached to the telescope. However, when using a camera you should always wear corrective lenses to ensure the sharpest possible focus. If you have astigmatism, corrective lenses must be ...
... If you wear corrective lenses (specifically glasses), you may want to remove them when observing with an eyepiece attached to the telescope. However, when using a camera you should always wear corrective lenses to ensure the sharpest possible focus. If you have astigmatism, corrective lenses must be ...
TELESCOPE CONCEPTS SUPER VIEWS OF SPACE
... Collecting Light for Longer Periods of Time The light detectors in telescopes can gather light from a single source over a long period of time. In some cases, light collected over several hours is used to create a single image. This is something the human eye cannot do. The cells in your retina coll ...
... Collecting Light for Longer Periods of Time The light detectors in telescopes can gather light from a single source over a long period of time. In some cases, light collected over several hours is used to create a single image. This is something the human eye cannot do. The cells in your retina coll ...
The Hubble sequence, overview of galaxies
... • If we measure the pulsation period, we then know the luminosity of the star and therefore can determine how far away it is (but the method must be calibrated with another distance indicator!) • One of the most important astronomical distance indicators • Closest Cepheid is Polaris • Pulsating star ...
... • If we measure the pulsation period, we then know the luminosity of the star and therefore can determine how far away it is (but the method must be calibrated with another distance indicator!) • One of the most important astronomical distance indicators • Closest Cepheid is Polaris • Pulsating star ...
Absolute Magnitudes of Supernovae
... Summary Using the Hubble Law, determine the absolute magnitudes of Type Ia supernovae occurring in distant galaxies. Background - During a three-week period in 1997, the Hubble Space Telescope was used to observe a supernova - an exploding star in a distant galaxy. These exploding stars appear sudde ...
... Summary Using the Hubble Law, determine the absolute magnitudes of Type Ia supernovae occurring in distant galaxies. Background - During a three-week period in 1997, the Hubble Space Telescope was used to observe a supernova - an exploding star in a distant galaxy. These exploding stars appear sudde ...
Reflecting vs Refracting
... For a given cleanliness class (Xc), the quantity N(D) describes the total number of particles of diameter (D) and larger. The minimum diameter of particle in the 1246C standard is defined at 1µm, and the largest diameter is equal to the cleanliness class in µm (in a Xc=200 distribution, the largest ...
... For a given cleanliness class (Xc), the quantity N(D) describes the total number of particles of diameter (D) and larger. The minimum diameter of particle in the 1246C standard is defined at 1µm, and the largest diameter is equal to the cleanliness class in µm (in a Xc=200 distribution, the largest ...
Hubble Space Telescope
The Hubble Space Telescope (HST) is a space telescope that was launched into low Earth orbit in 1990, and remains in operation. With a 2.4-meter (7.9 ft) mirror, Hubble's four main instruments observe in the near ultraviolet, visible, and near infrared spectra. The telescope is named after the astronomer Edwin Hubble.Hubble's orbit outside the distortion of Earth's atmosphere allows it to take extremely high-resolution images with negligible background light. Hubble has recorded some of the most detailed visible-light images ever, allowing a deep view into space and time. Many Hubble observations have led to breakthroughs in astrophysics, such as accurately determining the rate of expansion of the universe.Although not the first space telescope, Hubble is one of the largest and most versatile, and is well known as both a vital research tool and a public relations boon for astronomy. The HST was built by the United States space agency NASA, with contributions from the European Space Agency, and is operated by the Space Telescope Science Institute. The HST is one of NASA's Great Observatories, along with the Compton Gamma Ray Observatory, the Chandra X-ray Observatory, and the Spitzer Space Telescope.Space telescopes were proposed as early as 1923. Hubble was funded in the 1970s, with a proposed launch in 1983, but the project was beset by technical delays, budget problems, and the Challenger disaster. When finally launched in 1990, Hubble's main mirror was found to have been ground incorrectly, compromising the telescope's capabilities. The optics were corrected to their intended quality by a servicing mission in 1993.Hubble is the only telescope designed to be serviced in space by astronauts. After launch by Space Shuttle Discovery in 1990, four subsequent Space Shuttle missions repaired, upgraded, and replaced systems on the telescope. A fifth mission was canceled on safety grounds following the Columbia disaster. However, after spirited public discussion, NASA administrator Mike Griffin approved one final servicing mission, completed in 2009. The telescope is still operating as of 2015, and may last until 2030–2040. Its scientific successor, the James Webb Space Telescope (JWST), is scheduled for launch in 2018.