VWorlds30 3.0

Short:        Images of sky from any planet or comet.
Author:       pete@lpad.demon.co.uk (Peter Knight)
Uploader:     pete lpad demon co uk (Peter Knight)
Type:         misc/sci
Version:      3.0
Replaces:     misc/sci/VWorld*
Architecture: m68k-amigaos

Description
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This is VWorlds v3.0 (26/10/96), an update to v2.1 with many new features
(e.g. artificial earth satellite positions, more planetary moons, space
probe trajectories and more!)

Main features
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o Accurate numerical ephemeris giving planetary/lunar/solar positions to an 
  accuracy of a few seconds of arc.

o Realistic rendering of all major solar system bodies (Sun, Moon, planets, 
  selected comets & satellites). The solar system can be viewed from a point on 
  any of these objects, not just the Earth.

o Texture-mapped images of the Earth, Moon and Mars when viewed from another 
  body, with shading of night/twilight zones.

o Scalable projected map of the world showing shaded night/twilight zones, 
  position of observer and location of Moon's umbra and penumbra during solar 
  eclipses.

o Orrery, showing positions and orbits of planets and comets from any point 
  with respect to the Sun.

o Customizable comet and artificial satellite databases. The position of all 
  the objects entered into the database is calculated and their position displayed. 

o Plotting of all stars down to magnitude 8.0 from the SAO catalogue, with 
  proper motion information.

o Accurate prediction of 'special events'---solar/lunar eclipse, full/new moon, 
  Mercury/Venus conjunction, Mars opposition, lunar occultation etc.

o Shading of Milky Way region.

o Constellation outlines and names.

o Overlaid annotated grids (horizon, equatorial and ecliptic coordinate 
  systems).

o Selectable viewport orientation (horizon, equatorial or ecliptic systems).

o Shading of sky region below horizon.

o Continuous update and accelerated time modes for animations.

o Easy to use GadTools interface.

o It's Public Domain. You get a fully-functioning program!

Requires an Amiga computer with...
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o 256 colour intuition screen (some gfx cards may work, but there are known
  problems with CyberGfx).

o at least 8 Mb free RAM (1 Mb chip / 7 Mb fast).

o WB 3.0 (or better).

o 68020 (or better).

o Hard disk drive with at least 5 Mb free space.

Recommended
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o Floating point unit.

o Multiscan monitor.