السماء اليوم يوم الخميس، 22 أكتوبر: إيابيتوس في الاقتران العلوي

The Sky Today on Thursday, October 22: Iapetus at superior conjunction

Looking for a sky event this week? Check out our full Sky This Week column. October 21: Catch early-morning Orionids Saturn’s strange, two-faced moon Iapetus orbits on a wide path that it takes nearly 80 days to complete. During that time, it slowly rotates in synchrony with its orbit, brightening and fading by up to two magnitudes, Continue reading "The Sky Today on Thursday, October 22: Iapetus at superior conjunction" The post The Sky Today on Thursday, October 22: Iapetus at superior conjunc