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readme.1st
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1993-08-11
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I strongly believe in online help. This file contains only portions
of the SkyView help file so that you can decide whether or not you
are interested in installing SkyView, and to give you instructions
for performing that installation.
Description of SkyView
======================
SkyView is one of a growing number of astronomy applications for
Microsoft Windows. The program is designed to perform many of the
functions of a planetarium. As the name suggests, SkyView shows you
a view of the sky. The whole sky. It shows everything that you can
see in the sky from one location at one time.
SkyView displays
o The positions of the sun, moon, and all planets visible with the
naked eye.
o All stars down to a limiting magnitude you select.
o The positions of the ecliptic, celestial equator, galactic
equator, and equatorial coordinate system lines in any
combination.
SkyView allows you to
o See the sky as it looked or will look at any date and time
between the years 1900 and 2100, inclusive.
o See the sky as it looks from any location on the earth.
o Orient the sky display so that the North, South, East, or West
horizon is positioned at the bottom of the window.
o Print and print preview the sky display.
o Select the colors used for the window background and many of the
objects in the sky display.
SkyView was developed with a limited goal in mind. It does not try
to do everything and display everything related to astronomy.
SkyView is not the fastest program, and it is not the most accurate.
SkyView does not display small sections of the sky filled with dim
stars that you can only see through binoculars or a telescope. It
does not display deep sky objects such as nebulae, star clusters, or
galaxies. It does not label constellations or individual stars.
SkyView is free. If you enjoy playing around with it, that's great.
If not, let me know why.
Software and Hardware Requirements
==================================
Software Requirements
---------------------
SkyView requires Microsoft Windows 3.1, running in 386 Enhanced Mode.
Hardware Requirements
---------------------
For the best performance, SkyView should be run on a computer
equiped with at least a 486 CPU. Not only are such computer fast,
they are all equiped with a math coprocessor. Computers equiped with
486SX and 386 CPUs may contain an optional math coprocessor chip,
but many do not. SkyView performs very many trigonometric
calculations to generate the sky display, and these calculations
take significantly longer to perform without a math coprocessor. A
sky display that takes seconds to generate on a 486 system will take
minutes on a 386 system without a math coprocessor.
SkyView requires that you run Windows in a video mode that can
display 256 colors. It will run in a 16-color video mode, but the
sky display won't look very good. I've made no attempt to write the
program for or test it in a 16-color video mode. Hey, this is 1993.
Decent hardware is pretty cheap.
SkyView requires 800KB of hard disk space.
Installation
============
SkyView Distribution
--------------------
SkyView is distributed as a compressed file called skyview.zip. This
archive was created using the utility pkzip 2.04g. The file
skyview.zip contains the following files.
skyview.exe Executable
skyview.txt Description and installation instructions
skyview.hlp Help file
location.dat Location database
pelement.dat Orbital elements and other data for the
planets
ybsc64b.dat Star database
spin.vbx Spin buttons for the dialog boxes
threed.vbx Three-dimensional controls for the dialog
boxes
Installation Instructions
-------------------------
Use the following steps to install SkyView.
1. Create a directory to contain the SkyView files.
File Manager
a. Choose the command Create Directory from the File menu.
b. Type "skyview" as the directory name.
Norton Desktop for Windows
a. Choose the command Make Directory from the File menu.
b. Type "skyview" as the directory name.
DOS Command Line
a. Type "md skyview" on the command line.
2. Copy skyview.zip to the directory you just created.
File Manager or Norton Desktop for Windows
a. Drag the file skyview.zip to the directory you just created.
DOS Command Line
a. Type "copy skyview.zip c:\skyview" on the command line.
3. Uncompress the distribution file.
File Manager or Norton Desktop for Windows
a. Use your favorite Windows compression/decompression utility to
uncompress the file skyview.zip. You have probably associated
the .zip extension with this utility, so you should be able to
just double-click on the name to uncompress the file.
DOS Command Line
a. Type "pkunzip skyview" on the command line.
4. Create a new group to contain SkyView. If you wish to put the
SkyView icon in an existing group, skip to step 5.
Program Manager
a. Choose the New command from the File menu.
b. Select the Program Group radio button.
c. Type "SkyView" in the Description field.
Norton Desktop for Windows
a. Choose the New command from the File menu.
b. Select the Group radio button.
c. Type "SkyView" in the Title field.
5. Add the SkyView icon to a group.
Program Manager
a. Choose the New command from the File menu.
b. Select the Program Item radio button.
c. Type "SkyView" in the Description field.
d. Type "c:\skyview\skyview.exe" in the Command Line field.
Norton Desktop for Windows
a. Choose the New command from the File menu.
b. Select the Item radio button.
c. Type "SkyView" in the Title field.
d. Type "c:\skyview\skyview.exe" in the Program/Document/Script
field.
or, simply drag the file skyview.exe into the group or onto the
desktop.