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No helium needed to fill balloons for parties.....just vinegar and baking soda! i need to remember this!

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The star cluster Pismis 24 lies in the core of the large emission nebula NGC 6357 that extends one degree on the sky in the direction of the Scorpius constellation. Image from Hubble at http://www.spacetelescope.org/images/heic0619a/

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