***************************************************************************

* Celestia *

* *

* A real-time space simulation that lets you experience our universe in *

* three dimensions. *

* *

* Copyright (c) 2001-2020, Celestia Development Team *

* *

*-------------------------------------------------------------------------*

* Celestia web site: https://celestia.space *

* *

* Celestia documentation: *

* http://celestiamotherlode.net/catalog/documentation.html *

* Celestia WikiBook: http://en.wikibooks.org/wiki/Celestia *

* *

* Celestia forums: https://celestia.space/forum/ *

* *

***************************************************************************

CONTENTS

--------

License

Getting Started

Mouse, Keyboard & Joystick Controls

Star & Solar System Browser

Selecting Objects by Name

Known Issues

User Modifiable Elements

Celestia Resources

Building From Sources

Contributions

Acknowledgements

LICENSE

-------

This program is free software; you can redistribute it and/or modify it under

the terms of the GNU General Public License as published by the Free Software

Foundation; either version 2 of the License, or (at your option) any later

version.

This program is distributed in the hope that it will be useful, but WITHOUT

ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS

FOR A PARTICULAR PURPOSE. See the GNU General Public License for more

details, which you should have received along with this program (filename:

COPYING). If not, request a copy from:

Free Software Foundation, Inc.

59 Temple Place - Suite 330

Boston, MA 02111-1307

USA

GETTING STARTED

---------------

Celestia will start up in a window, and if everything is working correctly,

you'll see Earth in front of a field of stars. Displayed on-screen, is some

information about your target (Earth), your speed, and the current time

(Universal Time, so it'll probably be a few hours off from your computer's

clock).

Right drag the mouse to orbit Earth and you might see the Moon and some

familiar constellations. Left dragging the mouse changes your orientation

also, but the camera rotates about its center instead of rotating around

Earth. Rolling the mouse wheel will change your distance to Earth--you can

move light years away, then roll the wheel in the opposite direction to get

back to your starting location. If your mouse lacks a wheel, you can use the

Home and End keys instead.

When running Celestia, you will usually have some object selected. Currently,

it's Earth, but it could also be a star, moon, spacecraft, galaxy, or some

other object. The simplest way to select an object is to click on it. Try

clicking on a star to select it. The information about Earth is replaced with

some details about the star. Press G (or use the Navigation menu), and you'll

zoom through space toward the selected star. If you press G again, you'll

approach the star even closer.

Press H to select our Sun, and then G to go back to our Sun. Right click on

the sun to bring up a menu of planets and other objects in the solar system.

After selecting a planet from the menu, hit G again to travel toward it. Once

there, hold down the right mouse button and drag to orbit the planet.

The Tour Guide is a list of some of the more interesting objects you can visit

in Celestia. Select the Tour Guide option in the Navigation menu to display

the Tour Guide window. Choose a destination from the list, click the Goto

button, and you're off.

That covers the very basics. For a more in-depth look at Celestia and the

controls available to you, download the "Celestia User's Guide" (written by

Frank Gregorio), available in several languages, from:

http://celestiamotherlode.net/catalog/documentation.html

This web page also includes links to the Celestia README file translated into

Japanese.

MOUSE, KEYBOARD & JOYSTICK CONTROLS

-----------------------------------

See the included file: controls.txt OR use the Help menu to display the Controls

list.

STAR & SOLAR SYSTEM BROWSER

-------------------------------------------

The Navigation menu contains 'Solar System Browser' and 'Star Browser'

options.

STAR BROWSER

By default, the Star Browser window displays a table of the 100 nearest stars,

along with their Distance, Apparent and Absolute Magnitude, and Type. Clicking

on the column headers will sort the stars. The table is not continuously

updated, so if you travel to another star, you should press the Refresh button

to update the table for your current position. The radio buttons beneath the

table let you switch between viewing a list of Nearest, Brightest, or 'With

planets' stars. As with the solar system browser, clicking on any star name

in the table will select it. Use this feature along with the Center and Go

To buttons to tour the stars visible from any night sky in the galaxy.

SOLAR SYSTEM BROWSER

The Solar System Browser displays a window with a tree view of all the objects

in the nearest solar system (if there is one within a light year of your current

position.) Clicking on the name of any object in the window will select it.

You can then use the Center or Go To buttons to display that object in the main

Celestia window.

SELECTING OBJECTS BY NAME

-------------------------

Celestia provides several ways to select an object by name...

1. Choose 'Select Object' from the Navigation menu, type in the object

name, and click OK.

2. Press Enter, type in the entire object name, and press Enter again.

3. Press Enter, type in the first few characters of the object name,

press the Tab key to move through the displayed listing until the

object is highlighted, then press Enter again.

You can use common names, Bayer designations or catalog numbers for stars.

Celestia currently supports the HIP, HD and SAO catalogs. Catalog numbers must

be entered with a space between the prefix and the catalog number.

KNOWN ISSUES

------------

For up-to-the-minute answers to some common problems encountered when running

Celestia, please view either the FAQ in the Help menu or take a look at the

"Celestia User's FAQ" located on the Celestia User's Forum:

https://celestia.space/forum/

USER MODIFIABLE ELEMENTS

------------------------

You can modify how Celestia starts up each time you run it, by defining your

own start-up settings. Simply open the file "start.cel" in a plain text

editor and follow the in-file instructions. Also, view the celestia.cfg file

in a plain text editor to see additional settings.

Celestia allows you to easily add real, hypothetical, or fictional objects

by creating new catalog files. It is *not* recommended that you alter the

built-in data files; nearly all desired modifications and additions can be

made by placing new catalog files in Celestia's extras folders. There are three

types of catalog files:

- ssc (solar system catalog: planets, moons, spacecraft, etc.)

- stc (star catalog)

- dsc (deep sky catalog: galaxies, star clusters, and nebulae)

All three types of catalog file are text files that can be updated with your

favorite text editing program.

CELESTIA RESOURCES

------------------

Celestia Web Site:

https://celestia.space

Celestia User Forums:

https://celestia.space/forum/

Selden's List of Resources for Celestia:

http://www.lepp.cornell.edu/~seb/celestia/

Celestia WikiBook:

http://en.wikibooks.org/wiki/Celestia

Celestial Matters Website and Forums:

http://www.celestialmatters.org/

http://forum.celestialmatters.org/

Celestia Motherlode:

http://www.celestiamotherlode.net/

Celestia Cource Repository:

https://github.com/CelestiaProject/Celestia

Celestia Binary Repository:

https://bintray.com/celestia

Celestia Bug Tracking:

https://github.com/CelestiaProject/celestia/issues

Celestia Feature Requests:

https://github.com/CelestiaProject/celestia/issues

Celestia Discord Server:

https://discordapp.com/invite/WEWDcJh

Celestia SubReddit:

https://www.reddit.com/r/Celestiasoftware/

BUILDING FROM SOURCES

---------------------

See file INSTALL for building instructions.

CONTRIBUTIONS

-------------

Authors

-------

Chris Laurel <claurel@gmail.com>

Clint Weisbrod <cweisbrod@cogeco.ca>

Fridger Schrempp <t00fri@mail.desy.de>

Bob Ippolito <bob@redivi.com>

Christophe Teyssier <chris@teyssier.org>

Hank Ramsey <hramsey@users.sourceforge.net>

Grant Hutchison <grant.celestia@xemaps.com>

Pat Suwalski <pat@suwalski.net>

Toti

Da Woon Jung <dirkpitt2050@users.sf.net>

Vincent Giangiulio <vince.gian@free.fr>

Andrew Tribick

Hleb Valoshka

Li Linfeng

Contributors

------------

Deon Ramsey ........... original GTK1 interface

Christopher Andre ..... Eclipse Finder

Colin Walters ......... Endianness fixes

Peter Chapman ......... Orbit path rendering changes

James Holmes ..........

Harald Schmidt ........ Lua scripting enhancements, bug fixes

Nils Larsson .......... Qt enhancements

Documentation

-------------

Frank Gregorio ........ Celestia User's Guide

Hitoshi Suzuki ........ Japanese README translation

Christophe Teyssier ... DocBook and HTML conversion of User's Guide

Diego Rodriguez ....... Acrobat conversion of User's Guide

Don Goyette ........... CEL Scripting Guide

Harald Schmidt ........ Celx/Lua Scripting Guide

Scientific Data Base

--------------------

# Grant Hutchison

Supplied the correct orientations for the major planets, their moons, and a

number of asteroids and also worked on these data files:

Solarsys.ssc, nearstars.stc, extrasolar.ssc, extrasolar.stc, earth_locs.ssc

# Fridger Schrempp

Complete NGC/IC galaxy database + local group galaxies (galaxies.dsc)

Data base on globular clusters (globulars.dsc)

Data base on visual and spectroscopic binaries (visualbins.stc,

spectbins.stc)

World-capitals.ssc

Asterisms.dat

# Andrew Tribick

Significant update of the star.dat base based on new HIP Reduction of the

Raw data, Floor van Leeuwen, 2007.

CHARM2 stellar radii (charm2.stc)

Note on content from JPL

------------------------

Some content in Celestia, including texture maps and models, comes from JPL

websites. That content is subject to the JPL Image Use Policy, a copy of which

appears below (as captured on 2020-July-13). The latest version of this policy

can be found at https://www.jpl.nasa.gov/imagepolicy/. Also refer to

https://space.jpl.nasa.gov/faq.html for clarity on how textures/models are

covered.

# JPL Image Use Policy

# Unless otherwise noted, images and video on JPL public web sites (public

# sites ending with a jpl.nasa.gov address) may be used for any purpose

# without prior permission, subject to the special cases noted below.

# Publishers who wish to have authorization may print this page and

# retain it for their records; JPL does not issue image permissions on an

# image by image basis.

#

# By electing to download the material from this web site the user agrees:

# 1. that Caltech makes no representations or warranties with respect to

# ownership of copyrights in the images, and does not represent others who

# may claim to be authors or owners of copyright of any of the images, and

# makes no warranties as to the quality of the images. Caltech shall not be

# responsible for any loss or expenses resulting from the use of the images,

# and you release and hold Caltech harmless from all liability arising from

# such use.

#

# 2. to use a credit line in connection with images. Unless otherwise noted

# in the caption information for an image, the credit line should be

# "Courtesy NASA/JPL-Caltech."

#

# 3. that the endorsement of any product or service by Caltech, JPL or NASA

# must not be claimed or implied.

#

# Special Cases:

# * Prior written approval must be obtained to use the NASA insignia logo

# (the blue "meatball" insignia), the NASA logotype (the red "worm" logo)

# and the NASA seal. These images may not be used by persons who are not

# NASA employees or on products (including Web pages) that are not NASA

# sponsored. In addition, no image may be used to explicitly or implicitly

# suggest endorsement by NASA, JPL or Caltech of commercial goods or

# services. Requests to use NASA logos may be directed to Bert Ulrich, Public

# Services Division, NASA Headquarters, Code POS, Washington, DC 20546,

# telephone (202) 358-1713, fax (202) 358-4331, email bert.ulrich@hq.nasa.gov.

#

# * Prior written approval must be obtained to use the JPL logo (stylized JPL

# letters in red or other colors). Requests to use the JPL logo may be

# directed to the Institutional Communications Office, email

# instcomm@jpl.nasa.gov.

#

# * If an image includes an identifiable person, using the image for

# commercial purposes may infringe that person's right of privacy or publicity,

# and permission should be obtained from the person. NASA and JPL generally do

# not permit likenesses of current employees to appear on commercial products.

# For more information, consult the NASA and JPL points of contact listed above.

#

# * JPL/Caltech contractors and vendors who wish to use JPL images in

# advertising or public relation materials should direct requests to the

# Institutional Communications Office, email instcomm@jpl.nasa.gov.

#

# * Some image and video materials on JPL public web sites are owned by

# organizations other than JPL or NASA. These owners have agreed to make their

# images and video available for journalistic, educational and personal uses,

# but restrictions are placed on commercial uses. To obtain permission for

# commercial use, contact the copyright owner listed in each image caption.

# Ownership of images and video by parties other than JPL and NASA is noted in

# the caption material with each image.

Texture maps

------------

# The new textures repository in their original quality can be found here:

https://www.deviantart.com/celestiaofficial/gallery/68412929/Release-Textures

In particular, there are textures of Jupiter, Saturn, Phobos and Deimos.

# Most of the old maps are from David Seal's site: http://maps.jpl.nasa.gov/.

Some of these maps were modified, with fictional terrain added to fill in

gaps. The Galileo spacecraft model is also from David Seal's site (though

it was converted from Inventor to 3DS format.)

# The Mars, Neptune, and Uranus textures and Mars bump maps are all from James

Hastings-Trew's collection.

# Grant Hutchison

Saturn's rings were built by Grant Hutchison from Cassini imaging.

The Eros map is a shaded relief generated from the NEAR laser rangefinder.

# Jens Meyer

Dione and Rhea are USGS maps colored and modified by Jens Meyer.

The Moon map is based on data from PDS Map-A-Planet at with colors from

Mark Robinson.

# Fridger Schrempp

'Available data' Pluto and Charon textures using maps created by Marc Buie

at Lowell Observatory. Buie's maps were generated from photometric data

gathered during six years of mutual occultations of Pluto and Charon.

Titan's cloud texture in natural colors and its surface map at near-infrared

wavelength. They are based on resources available from the imaging site

(Ciclops) of the Cassini mission http://ciclops.org/

The Phoebe base texture was created from the cylindrical map published by

the Cassini imaging team

(http://photojournal.jpl.nasa.gov/catalog/PIA07775)

The Tethys textures are based on the Oct 2008 Ciclops map

(http://photojournal.jpl.nasa.gov/catalog/PIA11116)

The Iapetus texture was created from the Oct 2008 Ciclops map

(http://photojournal.jpl.nasa.gov/catalog/PIA11116)

The Lunar topography and bump maps, using Clementine laser altimeter data,

merged in the polar regions with topographic data from Clementine 750 nm

oblique and nadir images.

The Mercury map was created from a combination of Mariner 10 imaging

with recent MESSENGER WAC images from the first two flybys, as collected

and reprojected by Steve Albers.

# Phil Stooke

Proteus, Janus, Prometheus and Epimetheus maps are from Phil Stooke.

The Ida and Gaspra photomosaic maps are by Phil Stooke.

# Venus's clouds and the textures for Ganymede, Callisto and Saturn are from

Björn Jónsson.

# Venus's surface is a copyright-free NASA image, prepared from Magellan radar

data. The original is available at

http://www.solarviews.com/cap/venus/venmap.htm

# The Earth texture was created by NASA using data from the MODIS instrument

aboard the Terra satellite.

# Steve Albers

The Io and Europa maps are by Steve Albers.

# The textures for the Uranian satellites were created by Ivan Rivera from JPL

data. His Celestia page is: http://bruckner.homelinux.net/celestia.html

# The Hyperion map is a photomosaic assembled by Phil Stooke and

colored by Jens Meyer.

# Amalthea is a shaded relief map by Phil Stooke, colored by Wm. Robert Johnston

(http://www.johnstonsarchive.net/spaceart/cylmaps.html), and further modified

by Jens Meyer and Grant Hutchison.

# The asteroid.jpg texture was created by Paul Roberts.

# The textures for the five classes of extrasolar giant planet were created by

Andrew Tribick.

# CICLOPS

The map of Enceladus is derived from the December 2008 CICLOPS map:

http://ciclops.org/view/5447/Map_of_Enceladus_December_2008

3D Models

---------

# New space bodies models can be found in Greg Friger's 3D Asteroid Catalogue:

https://space.frieger.com/asteroids/

# Models of Mars Global Surveyor and Mars Odyssey were created by Shrox:

http://www.shrox.com/

They are included under the Creative Commons Attribution 4.0 International

License (CC BY 4.0):

https://creativecommons.org/licenses/by/4.0/

# The Cassini and Huygens models are by Jack Higgins:

http://homepage.eircom.net/~jackcelestia/

# The 3D model of ISS is a deconstruction of Andrew Farnaby's

complete ISS model with textures by Bob Hundley. The model

represents the ISS as of June 2008 and is a modification of

the model that can be found here:

http://www.celestiamotherlode.net/catalog/show_addon_details.php?addon_id=1199

ISS model of June 2008 (with Kibo) by krisci3 (modified and

converted in order to work with JPG by Ulrich Dickmann, a.k.a.

Adirondack)

# 3D asteroid models of Toutatis, Kleopatra, Geographos, 1998 KY26, Bacchus,

Castalia and Golevka are courtesy of Scott Hudson, Washington State

University. Originally found here:

http://users.tricity.wsu.edu/~hudson/Research/Asteroids/index.htm

On August 20, 2020, Scott Hudson waived the commercial use restrictions on

these models, permitting unrestricted use of them.

# 3D models of Amalthea, Janus, Epimetheus, Prometheus, Pandora,

Hyperion, Larissa, Proteus, Vesta, Ida, Gaspra and Halley are derived from

Phil Stooke's Cartography of Non-Spherical Worlds.

# The 3D model of Eros was prepared from the NEAR laser rangefinder shape model.

# The Phoebe mesh was designed by Jerry Gardner aka Jestr, jestr@ntlworld.com,

based on Phoebe's bumpy topography display from Cassini,

http://photojournal.jpl.nasa.gov/catalog/PIA06070

Libraries

---------

# This software is based in part on the work of the Independent JPEG Group.

# Some versions of Celestia may use the SPICE system for spacecraft and

planetary information, developed by Caltech/JPL under contract to NASA.

# Many cylindrical projections of photographs were performed by Fridger

Schrempp with Matthew Arcus 'mmps' software,

http://www.users.globalnet.co.uk/~arcus/mmps/

# The lower resolution textures were all converted from their higher resolution

versions using Gimp.

# The star database (stars.dat) was derived from the ESA's HIPPARCOS data set.

# Constellation boundaries are drawn from Davenhall & Leggett's "Catalogue of

Constellation Boundary Data":

http://cdsweb.u-strasbg.fr/viz-bin/ftp-index?/ftp/cats/VI/49

Other work

----------

# Selden Ball deserves a special mention for suffering more prerelease versions

finding more bugs, and giving more feedback than anyone else.

# Christophe Campos aka ElChristou created the splash screen for Celestia.

# The MacOS X icon was designed by Chris Alford: http://www.chrisalford.com/

# The txf font format used by Celestia was devised by Mark Kilgard.

ACKNOWLEDGEMENTS

----------------

A very big thank you for creating Celestia goes to Chris Laurel who started this

program in the year 2001.

<claurel@gmail.com>

http://www.shatters.net/~claurel/

http://www.shatters.net/celestia/

Special thanks go to all Celestia users who submit bug reports, suggestions, and

fixes. Celestia wouldn't be the program it is today, without their help.

The Celestia Development Team