words of one syllable

Very simple words; terms that are easy to understand. You're an astrophysicist and I'm not, so please, explain this concept in words of one syllable so I might have a chance of understanding it!

Common Names:

Name	Pronounced	Usage
Natan	-	Hebrew, Biblical Hebrew
Tutankhamon	too-tahng-KAH-mən (English)	Ancient Egyptian
Midha	-	Arabic
Wallace	['wɔlis]
Fionnlagh	-	Irish, Scottish
Arnauld	['a:rnəu]