1. The diagram shows the concave mirror of a Cassegrain reflecting
... An observer‟s unaided eye has a resolving power of 120 seconds of arc. If the angular magnification of a telescope is 24, determine the angular separation of two points on the Moon, which the same observer can just resolve with the aid of the telescope. The angular magnification of the instrument is ...
... An observer‟s unaided eye has a resolving power of 120 seconds of arc. If the angular magnification of a telescope is 24, determine the angular separation of two points on the Moon, which the same observer can just resolve with the aid of the telescope. The angular magnification of the instrument is ...
Slide 1
... Discs around white dwarfs White dwarfs have a population of cold, large radii, low mass, hard to detect Kuiper belt like discs. Observations find hot, dusty discs within tidal radius Can we link the two populations? Maybe the Kuiper-belts provide the reservoir of material required to replenish the ...
... Discs around white dwarfs White dwarfs have a population of cold, large radii, low mass, hard to detect Kuiper belt like discs. Observations find hot, dusty discs within tidal radius Can we link the two populations? Maybe the Kuiper-belts provide the reservoir of material required to replenish the ...
Calculating the Age of a Planetary Nebula
... There are some assumptions made at this point. This exercise assumes that the shell of gas that defines the formation of the planetary nebula is the one that is indicated in the image as the main shell. It also assumes that the expansion velocity quoted in the reference is for the shell being measur ...
... There are some assumptions made at this point. This exercise assumes that the shell of gas that defines the formation of the planetary nebula is the one that is indicated in the image as the main shell. It also assumes that the expansion velocity quoted in the reference is for the shell being measur ...
exploring the solar system, the galaxies, and the
... Open the Amazing Space web site at http://amazing-space.stsci.edu/ in preparation for lab activities during which you will find resources to address specific Georgia Performance Standards related to Astronomy for grades 2, 4, and 6. Read these standards below, and select at least two topics for whic ...
... Open the Amazing Space web site at http://amazing-space.stsci.edu/ in preparation for lab activities during which you will find resources to address specific Georgia Performance Standards related to Astronomy for grades 2, 4, and 6. Read these standards below, and select at least two topics for whic ...
Meade 60AZ
... the initial finding and centering of an object. The low-power MA25mm eyepiece presents a bright, wide field of view, ideal for terrestrial and general astronomical observing of star fields, clusters of stars, nebulae, and galaxies. For lunar and planetary viewing, switch to a higher power eyepiece s ...
... the initial finding and centering of an object. The low-power MA25mm eyepiece presents a bright, wide field of view, ideal for terrestrial and general astronomical observing of star fields, clusters of stars, nebulae, and galaxies. For lunar and planetary viewing, switch to a higher power eyepiece s ...
Adaptive Optics for the SALT
... The Southern African Large Telescope (SALT)1, 2 is a fixed elevation telescope (based on the Hobberly Ebberly Telescope3 (HET)) whose aperture is formed from 91 hexagonal mirrors in a close packed hexagonal array, generating an 11 meter diameter telescope. The aperture has a spherical figure with radi ...
... The Southern African Large Telescope (SALT)1, 2 is a fixed elevation telescope (based on the Hobberly Ebberly Telescope3 (HET)) whose aperture is formed from 91 hexagonal mirrors in a close packed hexagonal array, generating an 11 meter diameter telescope. The aperture has a spherical figure with radi ...
Animated Science Space Revision
... lumps of rock left over from when the Solar System was formed. The largest asteroid is called Ceres. It is about 1000 km across. Some asteroids have orbits that pass close to Earth and some even hit it. About 65 million years ago, an asteroid landed in Mexico. We think it caused the climate to chang ...
... lumps of rock left over from when the Solar System was formed. The largest asteroid is called Ceres. It is about 1000 km across. Some asteroids have orbits that pass close to Earth and some even hit it. About 65 million years ago, an asteroid landed in Mexico. We think it caused the climate to chang ...
Meteors, Asteroids, and Comets (Powerpoint)
... showed that Comet Hale-Bopp's nucleus spins about once every 12 hours. ...
... showed that Comet Hale-Bopp's nucleus spins about once every 12 hours. ...
Archaeology of the Milky Way - Max-Planck
... a well like marbles, and the gas compacted to form the first stars and galaxies. Without the midwifery of the dark matter, there would probably be no galaxies or stars. According to the conventional school of thought, the large galaxies like our Milky Way didn’t form to full size. Rather, there were ...
... a well like marbles, and the gas compacted to form the first stars and galaxies. Without the midwifery of the dark matter, there would probably be no galaxies or stars. According to the conventional school of thought, the large galaxies like our Milky Way didn’t form to full size. Rather, there were ...
arXiv:0712.2297v1 [astro
... Niedzielski et al. (2007). Briefly, we observe with the HET in its queue-scheduling mode and use the HRS at the R=60,000 resolution with the gas cell (I2 ) inserted in the optical path. In our target selection, we avoid bright objects, which are accessible to smaller telescopes. Consequently, more t ...
... Niedzielski et al. (2007). Briefly, we observe with the HET in its queue-scheduling mode and use the HRS at the R=60,000 resolution with the gas cell (I2 ) inserted in the optical path. In our target selection, we avoid bright objects, which are accessible to smaller telescopes. Consequently, more t ...
Earth Science
... If a star is moving away from the earth, toward which color will its visible light be shifted? ...
... If a star is moving away from the earth, toward which color will its visible light be shifted? ...
Inter-scan Overheads for Sequences of Drifts with ALFA
... The A1963 project objective is to map very deeply an area of sky 2 ◦ in R.A. by 1◦ in Dec. The target galaxy, NGC 2903, lies at Dec. +21◦ and is itself a strong HI line emitter as well as an extended radio continuum source. That it transits close to the Arecibo zenith is of particular note. The adop ...
... The A1963 project objective is to map very deeply an area of sky 2 ◦ in R.A. by 1◦ in Dec. The target galaxy, NGC 2903, lies at Dec. +21◦ and is itself a strong HI line emitter as well as an extended radio continuum source. That it transits close to the Arecibo zenith is of particular note. The adop ...
First Light for May, 2001 - South Bay Astronomical Society
... After a ten-minute break, George Nestojko gave a short presentation to the twenty people present about the RR Lyrae stars and the Blazhko effect, which is still not fully understood. The meeting then ended at 8:50. - Dr. Steven Morris ...
... After a ten-minute break, George Nestojko gave a short presentation to the twenty people present about the RR Lyrae stars and the Blazhko effect, which is still not fully understood. The meeting then ended at 8:50. - Dr. Steven Morris ...
Refuges for Life in a - University of Arizona
... the outer convective layers of sunlike stars are so massive and so well mixed that they would need to devour an unreasonable amount of planetary material to fully account for the high metallicities seen among stars with planets. Another rejoinder is that the correlation might be an observational bia ...
... the outer convective layers of sunlike stars are so massive and so well mixed that they would need to devour an unreasonable amount of planetary material to fully account for the high metallicities seen among stars with planets. Another rejoinder is that the correlation might be an observational bia ...
Hubblecast Episode 68: The Hubble time machine Visual notes 00
... near to us are fully formed, seen as sleek spirals and smooth ellipticals. As we travel further back, we see toddlers that are rough around the edges, still in the middle of evolving into fully-grown galaxies. ...
... near to us are fully formed, seen as sleek spirals and smooth ellipticals. As we travel further back, we see toddlers that are rough around the edges, still in the middle of evolving into fully-grown galaxies. ...
It is evident from our observations of impact craters on planets and
... The cause of auroras was explained and the connection to why they are more prominent near the poles was linked to Earth’s magnetic field. Understanding the stars has been greatly augmented with the development of large telescopes and instruments that accurately measure and analyze starlight. In part ...
... The cause of auroras was explained and the connection to why they are more prominent near the poles was linked to Earth’s magnetic field. Understanding the stars has been greatly augmented with the development of large telescopes and instruments that accurately measure and analyze starlight. In part ...
Document
... • Newborn stars may form a star cluster • Stars are held together in such a cluster by gravity • Occasionally a star moving more rapidly than average will escape, or “evaporate,” from such a cluster • A stellar association is a group of newborn stars that are moving apart so rapidly that their gravi ...
... • Newborn stars may form a star cluster • Stars are held together in such a cluster by gravity • Occasionally a star moving more rapidly than average will escape, or “evaporate,” from such a cluster • A stellar association is a group of newborn stars that are moving apart so rapidly that their gravi ...
The Sun and the Solar System
... size of the Moon? If the Moon is lined up with the Sun, what phenomenon will be observed by an observer on Earth? ...
... size of the Moon? If the Moon is lined up with the Sun, what phenomenon will be observed by an observer on Earth? ...
Today`s Powerpoint
... Some protostars not massive (< 0.08 MSun) enough to begin fusion. These are Brown Dwarfs or failed stars. Very difficult to detect because so faint. First seen in 1994 with Palomar 200”. How many are there? ...
... Some protostars not massive (< 0.08 MSun) enough to begin fusion. These are Brown Dwarfs or failed stars. Very difficult to detect because so faint. First seen in 1994 with Palomar 200”. How many are there? ...
Integrative Studies 410 Our Place in the Universe
... Herschel’s Findings • Stars thinned out very fast at right angles to Milky Way • In the plane of the Milky Way the thinning was slower and depended upon the direction in which he looked • Flaws: – Observations made only in visible spectrum – Did not take into account absorption by interstellar gas ...
... Herschel’s Findings • Stars thinned out very fast at right angles to Milky Way • In the plane of the Milky Way the thinning was slower and depended upon the direction in which he looked • Flaws: – Observations made only in visible spectrum – Did not take into account absorption by interstellar gas ...
Slide 1
... which shows the focal spot of the XRT mirrors. The position of this source can be determined by the XRT to within about 1 pixel (2.4 arcseconds). ...
... which shows the focal spot of the XRT mirrors. The position of this source can be determined by the XRT to within about 1 pixel (2.4 arcseconds). ...
Justin Kiehne: Next Generation X-ray Observatory
... X-ray astrophysics and astronomy require increasingly high resolution optics for the study of the most distant stellar objects. As resolution improves, light weight must be maintained for increasing photon collection area. X-ray observations are made from space so limitations imposed by launch must ...
... X-ray astrophysics and astronomy require increasingly high resolution optics for the study of the most distant stellar objects. As resolution improves, light weight must be maintained for increasing photon collection area. X-ray observations are made from space so limitations imposed by launch must ...
Lecture17-ASTA01
... and difficult to detect close to the glare of its star. • However, there are ways to find these planets. • To see how, all you have to do is imagine walking a dog. ...
... and difficult to detect close to the glare of its star. • However, there are ways to find these planets. • To see how, all you have to do is imagine walking a dog. ...
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.