<p style="font-size: 12px;color:#aaa;">版权引用：<a href="https://pikwizard.com/photo/history-of-chandra-x-ray-observatory/1eb91da35d25f81d997d7d1056070ebc"><span style="font-size: 12px;color:black;">“History of Chandra X-Ray Observatory”</span> </a>由 <a href=""><span style="font-size: 12px;color:black;">nasa</span></a> 授权许可 <span><a href="https://pikwizard.com/cc0-license" target="_blank" style="font-size: 12px;color:black;">CC0 1.0 Universal Public Domain Dedication<img src="" style="display: inline-block;height: 16px;width: auto;"></a></span></p>