Arroway's meeting with the Vegan. In an age where so many films depict aliens as beings who want to destroy/enslave us, or take all our resources, it's heartwarming to find a movie where the aliens are benevolent, and offer a message of hope to humanity.
Vegan: You are an interesting species, an interesting mix. You are capable of such beautiful dreams, and such horrible nightmares. You feel so lost, so cut off, so alone, only you're not. See, in all our searching, the only thing we've found that makes the emptiness bearable, is each other.
As well as being a film filled with hope and optimism for what else lies out in the universe:
''If we are alone in the Universe, it sure seems like an awful waste of space."
Her meeting ends with a meteor shower. The same one that she and her father were gonna see together as a kid, until his sudden death.