Try taking a picture of the sun ☀️ at sun set with a phone camera, change the zoom and take it again every time you take a photo the size will increase or decrease depending on the zoom & perspective. Also try looking at ships on the horizon with a good telescope on a clear day, they do not disappear over the horizon.
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https://www.facebook.com/share/r/1cpU216PYv/
Observable Truths - which are not possible on a spinning ball flying through space 🌍🚀
https://www.facebook.com/share/r/18GT8qiXDd/
https://www.facebook.com/share/r/18GT8qiXDd/