SPDX-License-Identifier: GPL-2.0-or-later Copyright (C) 2026 步天项目团队 This work 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 work 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. The complete GPL version 2 license text is included at LICENSES/GPL-2.0.txt. Third-party components and their separate notices are listed in THIRD_PARTY_NOTICES.md. The BSD-3-Clause text for the Hipparcos data distribution used by this project is included at LICENSES/BSD-3-Clause.txt.