It's not a jellyfish or a mushroom cloud or some time-delayed warp-gate undulating in midair—or maybe it's some extra-dimensional combination of all three—it's a sculpture by artist Janet Echelman, who uses colorful nets to create beautiful and hypnotic topological shapes for public spaces. [Sploid]
I love Janet Echelman's floating alien sculptures. I want them to be everywhere, like otherworldly guardians of the night. Urban skies—devoid of stars thanks to light pollution—are a lot more beautiful with these stunning nebulae in them.
There's a Kickstarter campaign to collect funds to build a new 700-foot long floating sculpture in Vancouver, her largest yet. This is a computer simulation:
And these are some of her sculptures around the world: