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2681. SSO 2.3m Sept 2003 Images
. Mars . Planetary Nebula NGC6337 . Last modified: Thu Apr 12 16:33:21 EST 2007
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Ссылки http://www.mso.anu.edu.au/~plah/Home_Page_Stuff/Honours_images/Honours_images.html -- 3.5 Кб -- 02.10.2012
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2682. The Spinning Sun
... SUNSPOTS: The surface of the Sun, called the photosphere, is at a temperature of 5800 degrees Kelvin. Sunspots are cooler features (3800 degrees Kelvin) wandering across the disk of the Sun that have been observed since ancient times. ... Solar activity is directly related to the frequency of sunspots. ... ROTATION: The sun does not rotate as a rigid body. ... The next task is to download a complete time series of images that illustrate how your sunspot is moving due to the sun's rotation. ...
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Ссылки http://www.mso.anu.edu.au/~jerjen/researchprojects/spinningsun/spinningsun.html -- 12.0 Кб -- 02.10.2012
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2683. Images of the GMRT 2006
. Click on an image for a higher resolution version. Maintenance being done. A bird on sitting on an antenna. The feed system. The centre of an antenna. The mesh covering the dishes. The GMRT antennas of the central array at sunset. Last modified: Tue Jun 5 14:39:31 EST 2007
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Ссылки http://www.mso.anu.edu.au/~plah/Home_Page_Stuff/GMRT_2006/GMRT_images_2006.html -- 11.0 Кб -- 02.10.2012
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2684. Dark Matter in Spiral Galaxies
... ROTATION CURVE: When studying spiral galaxies it is invariably found that the stellar rotational velocity in the disk remains constant, or "flat", with increasing distance away from the galactic center. ... The rotation speed of the stars in galaxies is found NOT to decrease with increasing distance from the galactic center (see emission lines in the spectrum), implying that the overall mass distribution of the galaxy is different from the light distribution. ...
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Ссылки http://www.mso.anu.edu.au/~jerjen/researchprojects/darkmatter/darkmatter.html -- 7.2 Кб -- 02.10.2012
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2685. Images of the GMRT
. Click on the images for a higher resolution version. A GMRT dish and its surroundings. A closeup of the feed system. A view of a dish from below. The Moon seen through a dish. Combined Images . Panorama: views of the dishes of the GMRT central array. Last modified: Tue May 23 15:51:21 EST 2006
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Ссылки http://www.mso.anu.edu.au/~plah/Home_Page_Stuff/GMRT_images/GMRT_images.html -- 10.0 Кб -- 02.10.2012
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2686. Color-Magnitude Diagram of a Milky Way Satellite Galaxy
... MATERIAL: astronomical data visualization software like ds9 , IRAF, and the two galaxy images in the V-band and I-band . ... You received images in the V and I-band of an unknown, partially resolved Milky Way dwarf satellite galaxy. Your task is to generate a color-magnitude diagram (CMD) of this stellar system, find out what kind of stellar population it is made of (old, young?) and estimate its distance from the sun using well-known features identified in the CMD. ...
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Ссылки http://www.mso.anu.edu.au/~jerjen/researchprojects/dwarf_cmd/dwarf_cmd.html -- 4.8 Кб -- 02.10.2012
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2687. The GMRT Array Distribution
Made using Google Earth images available in January 2008 . Above: The GMRT antennas of the central array as viewed from above. (click on the image for a larger version) . Above: The GMRT antennas of the central array and . the GMRT observatory buildings as viewed from above. (click on the image for a larger version) . ... Above: The GMRT antennas of the outer array from space. The position of antennas are marked by symbols. GMRT images Google Earth old . ...
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Ссылки http://www.mso.anu.edu.au/~plah/Home_Page_Stuff/GMRT_array/GMRT_array.html -- 4.4 Кб -- 02.10.2012
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2688. Cepheid Variables
... CEPHEID VARIABLE STARS: A Cepheid variable or Cepheid is a member of a particular class of very luminous, massive variable stars with pulsation periods of 1-70 days. ... The relationship is calibrated using data collected from Cepheids whose distances are determined by other means. ... Browse through the 68 CCD fits images he sent you, using ds9 and locate the Cepheid variable. ... Image credits: ESA - "http://sci.esa.int/science-e-media/img/20/cepheid-variables.jpg" . ...
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Ссылки http://www.mso.anu.edu.au/~jerjen/researchprojects/cepheids/cepheids.html -- 8.3 Кб -- 02.10.2012
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2689. A day in the life of a Stromlo Echidna
. The Echidna on the Duffield-Woolley bridge . Previous . Index . Next . In the box still but about to escape .
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Ссылки http://www.mso.anu.edu.au/~nichod/echidna/content/IMG_0247_large.html -- 4.3 Кб -- 02.10.2012
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2690. A day in the life of a Stromlo Echidna
. The Echidna on the Duffield-Woolley bridge . Previous . Index . Next . Trapped between two boxes .
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Ссылки http://www.mso.anu.edu.au/~nichod/echidna/content/IMG_0246_large.html -- 4.4 Кб -- 02.10.2012
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2691. A day in the life of a Stromlo Echidna
. The Echidna on the Duffield-Woolley bridge . Previous . Index . Next . Emma and Wolfgang trying to capture it .
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Ссылки http://www.mso.anu.edu.au/~nichod/echidna/content/IMG_0244_large.html -- 4.4 Кб -- 02.10.2012
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2692. A day in the life of a Stromlo Echidna
. The Echidna on the Duffield-Woolley bridge . Previous . Index . Next . Let's take another look...
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Ссылки http://www.mso.anu.edu.au/~nichod/echidna/content/IMG_0243_large.html -- 4.4 Кб -- 02.10.2012
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2693. A day in the life of a Stromlo Echidna
. The Echidna on the Duffield-Woolley bridge . Previous . Index . Next . Now for a look at the other side .
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Ссылки http://www.mso.anu.edu.au/~nichod/echidna/content/IMG_0242_large.html -- 4.4 Кб -- 02.10.2012
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2694. A day in the life of a Stromlo Echidna
. The Echidna on the Duffield-Woolley bridge . Previous . Index . Next . Looking for an escape route .
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Ссылки http://www.mso.anu.edu.au/~nichod/echidna/content/IMG_0241_large.html -- 4.3 Кб -- 02.10.2012
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2695. Computer Lab
... To introduce you to the Python programming language, and its Visual module (VPython), which allows 3D simulation. The computer labs are held in room BOZO 112, not in the usual physics lab. ... This lab will use the Python programming language. ... Click on the Windows button in the bottom left, select "Programs", then the "A-Z" list of programs. ... Later in the course you will need to write your own VPython programs for assessment - this lab is your chance to make sure you can do this. ...
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Ссылки http://www.mso.anu.edu.au/pfrancis/phys1101/ComputerLab/index.html -- 6.0 Кб -- 02.10.2012
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2696. About this document ...
. Up: Part IV Extragalactic Astronomy Previous: Sky Brightness . Part IV Extragalactic Astronomy Reference Sheet . This document was generated using the LaTeX 2 HTML translator Version 98.1p1 release (March 2nd, 1998) . Copyright © 1993, 1994, 1995, 1996, 1997, Nikos Drakos , Computer Based Learning Unit, University of Leeds. The command line arguments were: . latex2html reference.tex . The translation was initiated by Paul Francis on 1999-03-09 . Paul Francis . 1999-03-09
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Ссылки http://www.mso.anu.edu.au/pfrancis/reference/reference/node5.html -- 3.3 Кб -- 02.10.2012
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2697. Sky Brightness
. Next: About this document ... Up: Part IV Extragalactic Astronomy Previous: Magnitudes . Sky brightnesses in magnitudes per square arcsecond. This data is from Siding Spring observatory - other observatories will be comparable or worse. U . B . V . R . I . J . H . K . Kn . Dark Sky . 22.8 . 22.5 . 21.5 . 20.8 . 19.3 . 6-day Moon ... 21.3 . 20.8 . 20.4 . 19.2 . Full Moon ... 18.8 . 18.5 . 18.9 . 18.2 . 15.0 . 13.7 . 12.5 . 13.7 . Paul Francis . 1999-03-09
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Ссылки http://www.mso.anu.edu.au/pfrancis/reference/reference/node4.html -- 4.1 Кб -- 02.10.2012
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2698. Magnitudes
Next: Sky Brightness Up: Part IV Extragalactic Astronomy Previous: Signal-to-Noise Ratio . Each magnitude is a factor of 2.51 in luminosity. ... Magnitude Star ( W m -2 nm -1 ) . ... 240 . ... Next: Sky Brightness Up: Part IV Extragalactic Astronomy Previous: Signal-to-Noise Ratio Paul Francis . ...
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Ссылки http://www.mso.anu.edu.au/pfrancis/reference/reference/node3.html -- 8.6 Кб -- 02.10.2012
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2699. Signal-to-Noise Ratio
. Next: Magnitudes Up: Part IV Extragalactic Astronomy Previous: Cosmology . The signal-to-noise ratio of an observation is: . s / n = . where C is the count rate from the object (photons per second), t the exposure time, the read-out noise of each pixel, n the number of pixels on which the image falls, S the number of photons from the sky per unit solid angle, and A the solid angle subtended by the image. Paul Francis . 1999-03-09
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Ссылки http://www.mso.anu.edu.au/pfrancis/reference/reference/node2.html -- 3.6 Кб -- 02.10.2012
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2700. Cosmology
Next: Signal-to-Noise Ratio Up: Part IV Extragalactic Astronomy Previous: Part IV Extragalactic Astronomy . Redshift vs. Time: . ... where is the angle subtended on Earth by an object of proper length d at redshift z . ... where S is the energy received per second per square metre on earth, and L is the luminosity emitted by the object at redshift z in a second (object frame). ...
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Ссылки http://www.mso.anu.edu.au/pfrancis/reference/reference/node1.html -- 7.1 Кб -- 02.10.2012
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