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

Read also:

• Is Twilight appropriate for a 12-year-old?
• What is the moral stance on lying? Can you provide examples of when it is appropriate or inappropriate to lie? Does the Bible address this issue?
• How would you feel if your girlfriend had dick pics on her phone?
• How do police officers feel about the fear they instill into criminals?
• Which one is better to guys, boobs or butt?
• I feel like my boyfriend doesn't love me. Why?
• Le Mans 24 Hours: Kubica wins with Ferrari as Porsche spoils 1-2-3 - Autosport
• What was the first Native American tribe to inhabit Long Island, NY?
• What happens when you get sick in a country with universal healthcare? What's the process like?
• Why is my ex mad I moved on when he dumped me?
• Why do flat Earthers exist? Why can’t I see the Sun at night? Is it because Earth is not flat?
• Do married men like sucking dick?
• Why do I feel worthless most of the time?
• Are there any more 'nun' jokes?
• Why do women stubbornly refuse to let men lead, even though they are attracted to the man, and the man both loves and desires them? Why do they get angry and blame the man when he gets fed up and walks away, when it's entirely their own fault?