In two days Mercury will transit in front of the sun. The last time was in 2016. via /r/spaceporn https://ift.tt/34LanNR
from Tumblr https://ift.tt/2O330uK
In two days Mercury will transit in front of the sun. The last time was in 2016. via /r/spaceporn https://ift.tt/34LanNR
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