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

Read also:

• If I only have a fire extinguisher to defend myself against some threat from people, should I spray them for max damage or just hit them with the fire extinguishers?
• Why do siblings (or other close relatives) stop visiting each other as they grow older? Why does this happen with so many people nowadays?
• PoGO This Week (June 2-8): G-Max Rillaboom, Groudon Raids & GO Fest JC - Pokémon GO Hub
• Do you think this Labour Party is qualified to run our country?
• What are some difficulties in a JEE aspirant's life?
• ‘Hamilton’ Original Cast Reunites for Tony Awards Medley — Watch - The Hollywood Reporter
• Why is it rare for someone to despise both the Democrats and Republicans?
• Why was Boromir corrupted by the One Ring, but not Faramir in The Lord of the Rings?
• New questions emerge from the new charges in Kilmar Abrego Garcia case - NBC News
• This nonhormonal hot-flash remedy gives options to women, experts say - The Washington Post
• Having read so much about Archie and Lilibet not actually existing, does anyone have any proof that they not only exist but that Meghan gave birth to them?
• Incomprehensible: Kayla Harrison details barbaric UFC 316 weight cut as haunting sauna photos emerge - ‘Not good’ - MMAmania.com
• I am married for 3 years. My husband keeps pressing my boobs 40-50 times a day. He never stops though I ask him not to. What I should do to stop it?