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

Read also:

• “Very Odd” New Sea Monster Identified After Decades of Mystery - SciTechDaily
• Who Held or Bought the Huge US Government Debt even as the Fed Shed Treasury Securities in Q1? An Iffy Situation - Wolf Street
• Aussie firms Soul Patts and Brickworks' $9 billion merger sends their shares rocketing - CNBC
• How much should one budget to travel for 1 month generally?
• How do I induce a fever?
• HSBC’s Mark Tucker to return to insurer AIA as chair - Financial Times
• Why am I peeing so much without drinking a lot of water? I checked my blood sugar and it is normal. Could it be something else?
• Google launches Doppl, a new app that lets you visualize how an outfit might look on you - TechCrunch
• Was there any slavery of white people that actually compares to the transatlantic slave trade? I’m not baiting or anything actually genuinely curious and want to know.
• Why is money considered to be the root of all evil?
• Why does Filipino culture dictate that parents should be treated as gods?
• What are some effective ways to introduce a fantasy world to your main character without information dumping?