@database "The Digital Universe Introduction to Astronomy"
@remark Copyright © 1995, Syzygy Research & Technology Ltd. All rights reserved.
@node main "The Digital Universe Introduction to Astronomy"
This @{"hypertext" link define.guide/hypertext} document is meant to provide a brief introduction to astronomy.
The intention is not to teach you everything there is to know about the field,
but rather to provide an explanation of several concepts which are critical to
being able to use "The Digital Universe" to the utmost of its capabilities.

The following Chapters are available:

@remark beginverbatim
	@{"Chapter  1" link chapter1}  - A History of Astronomy (ancient - A.D. 999)
	@{"Chapter  2" link chapter2}  - A History of Astronomy (1000 - 1799)
	@{"Chapter  3" link chapter3}  - A History of Astronomy (1800 - present)
	@{"Chapter  4" link chapter4}  - General Introduction and Naked Eye Astronomy
	@{"Chapter  5" link chapter4a}  - Time Standards
	@{"Chapter  6" link chapter5}  - Electromagnetic Radiation (light)
	@{"Chapter  7" link chapter6}  - Telescopes
	@{"Chapter  8" link chapter7}  - Determining Star Properties
	@{"Chapter  9" link chapter8}  - Stellar Structure
	@{"Chapter 10" link chapter9}  - Stellar Evolution
	@{"Chapter 11" link chapter10}  - The Interstellar medium
	@{"Chapter 12" link chapter11}  - Galaxies
	@{"Chapter 13" link chapter12}  - Cosmology
	@{"Chapter 14" link chapters2.guide/expandinguniverse}  - Our Expanding Universe
	@{"Chapter 15" link chapter14}  - Requirements for Extra-terrestrial Life
	@{"Chapter 16" link duobjects.guide/main}  - Information about Specific Objects
	@{"Chapter 17" link spacecraft.guide/main}  - Interplanetary Spacecraft
	@{"Chapter 18" link people.guide/main}  - Famous People in Astronomy
	@{"Chapter 19" link define.guide/index_astronomy}  - Definitions of Astronomical Terms
@remark endverbatim
@endnode

@node chapter1 "A Short History of Astronomy (ancient - A.D. 999)"
This information is not provided with the demonstration version of
"The Digital Universe".  Please consult @{"Ordering The Digital Universe" link duhelp.guide/ordering}
for more information on how to obtain a registered version.
@endnode

@node chapter2 "A Short History of Astronomy (1000 - 1799)"
This information is not provided with the demonstration version of
"The Digital Universe".  Please consult @{"Ordering The Digital Universe" link duhelp.guide/ordering}
for more information on how to obtain a registered version.
@endnode

@node chapter3 "A Short History of Astronomy (1800 - present)"
This information is not provided with the demonstration version of
"The Digital Universe".  Please consult @{"Ordering The Digital Universe" link duhelp.guide/ordering}
for more information on how to obtain a registered version.
@endnode

@node chapter4 "General Introduction and Naked Eye Astronomy"
This information is not provided with the demonstration version of
"The Digital Universe".  Please consult @{"Ordering The Digital Universe" link duhelp.guide/ordering}
for more information on how to obtain a registered version.
@endnode

@node atomictime "Atomic Time (TAI)"
This information is not provided with the demonstration version of
"The Digital Universe".  Please consult @{"Ordering The Digital Universe" link duhelp.guide/ordering}
for more information on how to obtain a registered version.
@endnode

@node dynamicaltime "Dynamical Time (TD)"
This information is not provided with the demonstration version of
"The Digital Universe".  Please consult @{"Ordering The Digital Universe" link duhelp.guide/ordering}
for more information on how to obtain a registered version.
@endnode

@node siderealtime "Sidereal Time"
This information is not provided with the demonstration version of
"The Digital Universe".  Please consult @{"Ordering The Digital Universe" link duhelp.guide/ordering}
for more information on how to obtain a registered version.
@endnode

@node universaltime "Universal Time (UT)"
This information is not provided with the demonstration version of
"The Digital Universe".  Please consult @{"Ordering The Digital Universe" link duhelp.guide/ordering}
for more information on how to obtain a registered version.
@endnode

@node chapter5 "Electromagnetic Radiation (light)"
This information is not provided with the demonstration version of
"The Digital Universe".  Please consult @{"Ordering The Digital Universe" link duhelp.guide/ordering}
for more information on how to obtain a registered version.
@endnode

@node chapter6 "Telescopes"
This information is not provided with the demonstration version of
"The Digital Universe".  Please consult @{"Ordering The Digital Universe" link duhelp.guide/ordering}
for more information on how to obtain a registered version.
@endnode

@node chapter7 "Determining the Properties of the Stars"   
This information is not provided with the demonstration version of
"The Digital Universe".  Please consult @{"Ordering The Digital Universe" link duhelp.guide/ordering}
for more information on how to obtain a registered version.
@endnode

@node chapter8 "Stellar Structure"
This information is not provided with the demonstration version of
"The Digital Universe".  Please consult @{"Ordering The Digital Universe" link duhelp.guide/ordering}
for more information on how to obtain a registered version.
@endnode

@node chapter8power "The Sun's power source"
This information is not provided with the demonstration version of
"The Digital Universe".  Please consult @{"Ordering The Digital Universe" link duhelp.guide/ordering}
for more information on how to obtain a registered version.
@endnode

@node chapter9 "Stellar Evolution"
This information is not provided with the demonstration version of
"The Digital Universe".  Please consult @{"Ordering The Digital Universe" link duhelp.guide/ordering}
for more information on how to obtain a registered version.
@endnode

@node chapter10 "The Interstellar Medium"
This information is not provided with the demonstration version of
"The Digital Universe".  Please consult @{"Ordering The Digital Universe" link duhelp.guide/ordering}
for more information on how to obtain a registered version.
@endnode

@node chapter11 "Galaxies"
This information is not provided with the demonstration version of
"The Digital Universe".  Please consult @{"Ordering The Digital Universe" link duhelp.guide/ordering}
for more information on how to obtain a registered version.
@endnode

@node chapter12 "Cosmology"
This information is not provided with the demonstration version of
"The Digital Universe".  Please consult @{"Ordering The Digital Universe" link duhelp.guide/ordering}
for more information on how to obtain a registered version.
@endnode

@node chapter14 "Requirements for Extra-Terrestrial Life"
This information is not provided with the demonstration version of
"The Digital Universe".  Please consult @{"Ordering The Digital Universe" link duhelp.guide/ordering}
for more information on how to obtain a registered version.
@endnode