Under use <a href="https://en.wikipedia.org/wiki/telescope" class="extiw" title="en:telescope">telescope</a> observation's <a href="https://en.wikipedia.org/wiki/cygnus" class="extiw" title="en:cygnus">cygnus</a> <a href="https://en.wikipedia.org/wiki/Albireo" class="extiw" title="en:Albireo">Albireo</a>, Albireo is <a href="https://en.wikipedia.org/wiki/double_stars" class="extiw" title="en:double stars">double stars</a>, respectively be orange color and cyan color.
<a href="https://zh.wikipedia.org/wiki/User:%E9%98%BF%E7%88%BE%E7%89%B9%E6%96%AF" class="extiw" title="zh:User:阿爾特斯">阿爾特斯</a>
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