How do flat Earthers explain the existence of other spherical planets?

Read also:

• Does a person with schizophrenia hear voices?
• What does it mean when a guy says he's afraid of falling for someone else after going through heartbreaks?
• My wife has a bunch of really attractive friends, and she expects me to never say anything to her about how beautiful they are. Does this seem fair? I love my wife, and just commenting shouldn’t hurt anything, right?
• What factors contributed to The Beatles' bitterness?
• Can a mother forget her child after she puts him or her up for adoption?
• How can the citizens of Russia accept the enormous difference between people? The richest 500 Russians own more than the poorest 99.8% of the entire Russian population combined. Why don't we see any protests?
• Why is dating so frustrating and difficult for a guy?
• Why do people have polyamorous relationships?
• Do you think a lot of sociopaths' parents kill themselves for having brought such disgusting evil into the world? How much shame and disgust must they carry?
• — fri(end)s forever!
• Sex advice: I'm finally ready to enter my promiscuity era. But there's a catch. - Slate Magazine
• Aaron Judge's 469-Foot Home Run in Kansas City Left Baseball World in Disbelief - Sports Illustrated