Add license information to data files (#328)

While we wait for license files for textures, I figured we should work
on license for data files also.

Note that I have replaced a bunch of "Celestia Development Team" with
the actual people that made PR affecting this file.

Author: AstroChara

data/CMakeLists.txt

@@ -11,6 +11,7 @@ set(DATA_SOURCES
   asteroids.ssc
   asteroids_locs.ssc
   boundaries.dat
+  boundaries.dat.license
   comets.ssc
   dwarfplanets.ssc
   dwarfplanets_locs.ssc

data/asterisms.dat

@@ -1,12 +1,12 @@
+# SPDX-FileCopyrightText: 2025 AstroChara
+# SPDX-FileCopyrightText: Alan MacRobert
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # Constellation patterns for IAU designated constellations
 
 # Based on charts made by IAU and Sky & Telescopes
 #   https://www.iau.org/Iau/Science/What-we-do/The-Constellations.aspx#Constellations-5
 
-# SPDX-FileCopyrightText: 2025 AstroChara
-# SPDX-FileCopyrightText: Alan MacRobert
-# SPDX-License-Identifier: CC-BY-4.0
-
 "Andromeda"
 [
 [ "ALF And" "DEL And" "BET And" "GAM And" ]

data/asteroids.ssc

@@ -1,3 +1,11 @@
+# SPDX-FileCopyrightText: 2004-2005, 2007-2009 Grant Hutchison
+# SPDX-FileCopyrightText: 2006-2008 Chris Laurel
+# SPDX-FileCopyrightText: 2019 Askaniy Anpilogov
+# SPDX-FileCopyrightText: 2021, 2023 SevenSpheres
+# SPDX-FileCopyrightText: 2023-2026 Pedro J. Garcia
+# SPDX-FileCopyrightText: 2024-2025 AstroChara
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # Some minor planets and their respective satellites, up to the orbit of
 # Jupiter. Ceres is defined in dwarfplanets.ssc.
 

data/asteroids_locs.ssc

@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2023 Askaniy Anpilogov
+# SPDX-FileCopyrightText: 2023, 2025-2026 Pedro J. Garcia
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # 374 locations on Vesta, Lutetia, Ida, Mathilde, Eros, Gaspra, Steins, Itokawa, Didymos, Dimorphos, Bennu, Ryugu and Arrokoth.
 
 

data/boundaries.dat.license

@@ -0,0 +1,3 @@
+# SPDX-FileCopyrightText: 2002 Chris Laurel
+# SPDX-FileCopyrightText: 2004 Grant Hutchison
+# SPDX-License-Identifier: GPL-2.0-or-later

data/comets.ssc

@@ -1,9 +1,12 @@
+# SPDX-FileCopyrightText: 2004, 2008 Grant Hutchison
+# SPDX-FileCopyrightText: 2007, 2009 Chris Laurel
+# SPDX-FileCopyrightText: 2025-2026 DaveBowman2001
+# SPDX-FileCopyrightText: 2025 AstroChara
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # Catalog of Comets for Celestia
 # Version 1.7.0
 #
-# SPDX-FileCopyrightText: Celestia Development Team
-# SPDX-License-Identifier: GPL-2.0-or-later
-#
 # All EllipticalOrbit data for comets below were retrieved from
 # NASA/JPL's Small Body Database System (SBDB) unless noted
 # otherwise:

data/dwarfplanets.ssc

@@ -1,3 +1,12 @@
+# SPDX-FileCopyrightText: 2019 375gnu
+# SPDX-FileCopyrightText: 2019 Askaniy Anpilogov
+# SPDX-FileCopyrightText: 2019, 2021 SevenSpheres
+# SPDX-FileCopyrightText: 2023 Andrew Tribick
+# SPDX-FileCopyrightText: 2023-2025 AstroChara
+# SPDX-FileCopyrightText: 2024-2025 Pedro J. Garcia
+# SPDX-FileCopyrightText: 2025 LunaTheSilly
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # Dwarf planets of the Solar System along with all known satellites.
 # Each object has all alternative designations.
 # Pluto is defined first, so that it will be selected by the '9' key.

data/dwarfplanets_locs.ssc

@@ -1,3 +1,6 @@
+# SPDX-FileCopyrightText: 2023 Askaniy Anpilogov
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # 222 locations on Ceres, Pluto and Charon.
 # SSC-file author: CLM tool by Askaniy (https://github.com/Askaniy/CelestiaLocationsMaker)
 

data/earth_locs.ssc

@@ -1,3 +1,6 @@
+# SPDX-FileCopyrightText: 2006 Chris Laurel
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 Location "NORTH AMERICA" "Sol/Earth"
 {
     LongLat [ -105 40 0 ]

data/galaxies.dsc

@@ -1,3 +1,9 @@
+# SPDX-FileCopyrightText: 2003, 2005 Chris Laurel
+# SPDX-FileCopyrightText: 2005-2008 Fridger Schrempp
+# SPDX-FileCopyrightText: 2021 SevenSpheres
+# SPDX-FileCopyrightText: 2025 Andrew Tribick
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # Revised NGC and IC Catalog, Wolfgang Steinicke, January 6, 2006
 # http://www.ngcic.org/steinicke/default.htm
 #