How long is a galactic year?. #Astronomy #science https://t.co/f9glVGxbnO

Aug 31, 2020

How long is a galactic year?. #Astronomy #science https://t.co/f9glVGxbnO
— Yusra Salim | يُسرى بِنْت سالم (@Shulab) August 31, 2020

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