![Aerogel in Hand](https://www.nasa.gov/wp-content/uploads/2023/03/137922main_image_feature_449_ys_full.jpg)
Aerogel in Hand
Though ghostly in appearance like a hologram, aerogel is very solid and feels like hard styrofoam to the touch. Aerogel was used on the Stardust spacecraft to capture comet particles from Comet Wild 2 in January 2004.
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https://www.nasa.gov/image-detail/aerogel-hand/
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