دو جهان صخره‌ای نزدیک می‌توانند نمایی از سیاراتی را که به نظر می‌رسد در مسیر معکوس هستند، به ستاره‌شناسان بیگانه ارائه دهند

Two nearby rocky worlds could offer alien astronomers views of planets appearing to reverse course

Aliens have long been a staple of science fiction. Yet the possibility of intelligent life beyond Earth is more than a matter of imagination—it is also a subject of serious scientific inquiry. Professor Woong-bae Zee of Sejong University's School of Liberal Studies has recently published an astronomy paper that places the word "alien" front and center.