A Sunny Day May 15, 2018 nasaboy ⋅ NASA POTD, Space ⋅ NASA Pictures ⋅ No comments Each and every day NASA’s Solar Dynamics Observatory (SDO) observes our Sun and relays observational data to scientists on Earth. Like 0 Thanks! You've already liked this 41 views Leave a Reply CancelYou must be logged in to post a comment. This site uses Akismet to reduce spam. Learn how your comment data is processed.