Gravity is a software program designed by Steve Safarik
to simulate the motions of
planetary bodies in space. Users can create
solar systems of up to 16 bodies. Mass, density, initial position, and initial velocity can be varied by user input. The bodies are then plotted as they move according to the
Newtonian law of gravitation. Simulation settings may be saved as files with the extension "".
Minimum requirements
*
IBM-compatible personal computer
*Graphics display (
Hercules,
CGA,
EGA
Ega or EGA may refer to:
Military
* East German Army, the common western name for the National People's Army
* Eagle, Globe, and Anchor, the emblem of the United States Marine Corps
People
* Aega (mayor of the palace), 7th-century noble of Neus ...
,
VGA
Video Graphics Array (VGA) is a video display controller and accompanying de facto graphics standard, first introduced with the IBM PS/2 line of computers in 1987, which became ubiquitous in the PC industry within three years. The term can now ...
,
8514
IBM 8514 is a graphics card manufactured by IBM and introduced with the IBM PS/2 line of personal computers in 1987. It supports a display resolution of pixels with 256 colors at 43.5 Hz (interlaced), or at 60 Hz ( non-interlaced) ...
/a)
*Disk drive (
floppy disk
A floppy disk or floppy diskette (casually referred to as a floppy, or a diskette) is an obsolescent type of disk storage composed of a thin and flexible disk of a magnetic storage medium in a square or nearly square plastic enclosure lined w ...
or
hard disk
A hard disk drive (HDD), hard disk, hard drive, or fixed disk is an electro-mechanical data storage device that stores and retrieves digital data using magnetic storage with one or more rigid rapidly rotating platters coated with magnet ...
)
*At least 384K free
RAM
*A
math coprocessor
Mathematics is an area of knowledge that includes the topics of numbers, formulas and related structures, shapes and the spaces in which they are contained, and quantities and their changes. These topics are represented in modern mathematics ...
(
80x87).
References
Science software for Windows
Windows-only shareware
Astronomy software
{{Astronomy-stub