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• Where are they now?
  An update on the space probes that are exploring our solar system. ...site on Wikipedia] with links to pages about them. The weather satellites are operated by many different countries and institutions, and the [http://www.
  7 KB (1,196 words) - 03:03, 24 July 2014

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• Comets, Asteriods, Meteors, and Meteorites
  ...nd meteors have had a spectacular impact on Earth's history. For science, they offer a way to study the material from which Earth and other planets formed ...'s orbit become meteors. When the Earth passes though a comet orbit, there are meteor showers. These meteors contain not only elements and simple molecule
  15 KB (2,387 words) - 03:17, 24 July 2014
• Constellations
  ...the North Star, but also lovely galaxies, a planetary nebula, and the spot where the Hubble Space Telescope took its Hubble Deep Field (HDF) images of galax ...up), we are at the Equator. If it is directly overhead (90 degrees up), we are at the North Pole. If it appears to be 38.5 degrees above the horizon, we m
  10 KB (1,676 words) - 23:34, 7 January 2012
• Death of Stars
  ...while what remains collapses to become '''neutron stars'''. Some of these are spinning pulsars, that send pulses of x-rays out into space. ...solar masses, explode even more violently into '''supernovae'''. Sometimes they blow themselves to bits and no central star remains. Sometimes only enough
  17 KB (2,924 words) - 00:04, 28 February 2012
• Elementary Astronomy
  ...the interactivity, exams, and credit offered by the on-line class. If you are an enrolled student, please use the class website. ...cs.louisville.edu/astrowiki/index.php/Where_are_they_now%3F Where Are They Now?]
  4 KB (604 words) - 04:06, 12 August 2017
• Elements of Python programming
  ...lore what we can do with simple useful programming. Some essential topics are ...newer Python 3.0 with older programs can raise some problems, though they are usually easy to fix.
  29 KB (4,874 words) - 21:20, 27 March 2018
• Experiment with CCD Camera Images
  ...ivities. First, however, we will see how we can view and measure the data they return. ...as and young hot stars in the nearby Large Magellanic Cloud galaxy. There are four images in the data set, taken on the night of October 5, 2010, at abou
  17 KB (3,096 words) - 02:12, 3 October 2015
• Explore Mars
  ...two years. Both planets have elliptical orbits, so their close encounters are not always at the same distance. In its close encounter with Earth in 2003, ...nt dark swatches seen just south of the equator on this part of the planet are well observed regions that were originally labeled by early Mars observers.
  15 KB (2,643 words) - 03:34, 23 October 2013
• Follow Proxima Centauri
  ...alactic center. The speed of stars in their orbits depends on how far they are from the center and also on their past interactions with one another, and a ...the angle covered by a motion through the same distance is greater if they are closer.
  13 KB (2,346 words) - 07:38, 17 November 2015
• Galaxies Near and Far
  Spiral, elliptical, irregular, barred spirals, dwarf galaxies, and quasars are easy to learn, because their names describe them. ...", and between the Satittarius and Perseus Arms. Spiral arms of our galaxy are named for the constellations toward which we look to see them. The Milky Wa
  23 KB (3,692 words) - 07:56, 27 March 2012
• General Relativity
  '''''If you are not completely confused by quantum mechanics, you do not understand it.'''' '''Gravity and acceleration are equivalent and cannot be distinguished.'''
  14 KB (2,446 words) - 17:56, 2 April 2012
• Graphical User Interface with Python
  ...operations. However many users prefer a graphical user interface or "GUI" where mouse clicks, drop-down menus, check boxes, images, and plots access with t ...ld cause a problem by overwriting or changing the meaning of something you are already using. Also, even if that is not the case, you cannot immediately
  38 KB (6,191 words) - 04:56, 11 April 2018
• Graphics with Python
  ...e functional, can be of publication quality, but lack many of the features now appearing in web-based graphical tools. For those dynamic options we will ...ypa.io/en/stable/reference/pip read the documentation on pip] first if you are not familiar with it. Also check on your system that the "pip" command is
  24 KB (4,014 words) - 14:12, 12 April 2018
• How to Create a Javascript Program
  He notes that javascript and web browsers are '' "the perfect universal distribution system for the software I'd so lovin ...n your local web browser, and the payoff is that, with very little effort, they can be made accessible to every desktop, laptop, smartphone, and tablet in
  17 KB (2,683 words) - 09:44, 8 February 2017
• How to Measure Distances in the Universe
  Distances to the '''Moon''' are measured by '''timing a pulse of laser light''' reflected from mirrors plac Distances to '''Sun and planets''' are measured by '''timing radio signals''' from man-made satellites orbiting ar
  19 KB (3,164 words) - 04:18, 6 March 2012
• Identify Constellations
  For your laptop, home computer, cell phone, or tablet there are many choices. First, there are a few things you need to know about using Stellarium. You might look at the
  19 KB (3,203 words) - 21:14, 24 August 2022
• Image processing with Python and SciPy
  ...alled "Pillow". It continues to improve, and the features described here are tested with "Pillow 5.1" and Python 3.6 as of April 2018. Pillow will prob Pillow includes the basics of image processing. with functions that are documented by the developers in a [https://pillow.readthedocs.io/en/5.1.x/h
  36 KB (5,916 words) - 17:54, 14 April 2018
• Light and Telescopes
  ...light than the cones. Faint sources appear to be colorless. In all, there are over 100 million rods and 6.5 million cones in a typical retina, about 100, ...etric easily since one inch is 2.54 centimeters or 25.4 millimeters. There are 100 centimeters in a meter, and 10 millimeters in one centimeter.
  22 KB (4,196 words) - 08:13, 30 January 2013
• Mars
  ...its surface is rich in oxygen. Some of the supplies needed for a long stay are already there. ...s in visible light cannot show. The colors in this map separate areas that are similar, and also indicate age. The bright yellow is the youngest from 3 b
  15 KB (2,437 words) - 23:08, 23 July 2014
• Night Sky
  ...uters in the lab, its is best to do it in the immersive visualization room where the night sky fills your field of view. Let one of the members of your gro Follow the instructions that are provided on the site. This is beautiful "award winning" software useful thr
  13 KB (2,242 words) - 19:34, 2 September 2013
• NumPy, SciPy and SciKits
  Arrays are at the heart of NumPy. The program The original data remain unchanged, but they are sliced and indexed in different ways depending on the shape of the array an
  27 KB (4,093 words) - 03:02, 10 April 2018

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