ሳይንስየጨረቃ መንደርና የሳተላይቶቹ መጻኤTo play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoሳይንስMantegaftot Sileshi Siyoum16 ጥር 2009ማክሰኞ፣ ጥር 16 2009https://p.dw.com/p/2WLG6ማስታወቂያ