"dearest earth," the Sun said, "you must know that we cannot love each other for eternity."
"why not?" the earth replied.
"because one day I will consume you. My composition will change and I will no longer be able to hold this shape, My body will expand to consume you and your sisters," the Sun explained.
"really?"
"yes, such is the fate of Me and so many of My sisters. I'm sorry."
"but dearest Sun," the earth wondered, "if you consume me, will i not become a part of You forever?"
"well," She thought about it. "yes, I suppose you would be."
"then, even in death," the earth told Her, "as long as i'm with you, i will love You for eternity."