There are some cute, tiny astronauts, aliens and planets out there this Halloween.
NASA put out a call to followers on Twitter, asking them to share their space-themed costumes with the #NASACostume hashtag, and space fans obliged.
After all, what's spookier than the eternal blackness of the ever-expanding universe?
SEE ALSO: The sun looks like a creepy jack-o'-lantern in this NASA photoThe Halloween photos show plenty of happy little astronauts and even some adult space fans getting into the holiday spirit.
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Some people also took the call for space costumes in a different direction, sending in photos of space cadets dressed up as some science fiction favorites.
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A few families even got into the spooky spirit with space-themed group costumes.
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NASA also has a handy costume handout of its own for this Halloween.
The space agency has produced a series of paper "planet masks" for those of you in needs of a low-tech, last-minute costume for the holiday.
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The masks are a little creepy with their soulless, cutout eyes, but hey, at least it's better than having no space costume at all.
