Space Jelly Fish From today’s launch of SpaceX. Beautiful pic.twitter.com/98mzIGHDOmMay 6, 2022
Early Thursday morning (May 5th), a camera in Waycross, Georgia witnessed a mysterious object streaking in the sky. As Chris Combs, a professor of aerodynamics and mechanical engineering at the University of Texas at San Antonio, said, the object looked a bit like a space jellyfish, dragged by a bright, fast, and shining rectangular aura. On twitter..
Of course, as Combs pointed out, this space jelly wasn’t a UFO – it was SpaceX Falcon9 rocket It fires from the Kennedy Space Center in Florida, about 250 miles (400 km) south of the camera. Dozens of rockets leave Kennedy’s launch pad each year, but few can be mistaken for bioluminescent invertebrates in the sky. So what happened here?
According to Combs, it’s a combination of physics and perfect timing.
For starters, Combs writes that the long, chubby “body” of a jellyfish is just the exhaust gas that leaves the Falcon 9 rocket engine nozzle. The reason why the exhaust is bulbous like this is related to the pressure difference inside and outside the nozzle. In this case, the exhaust leaving the nozzle is “insufficiently expanded”. That is, when the exhaust exits the nozzle of the engine, the gas becomes hotter than the surrounding air.
According to Combs, the rocket’s vents reduce their own pressure by expanding as soon as they leave the nozzle to match the background pressure around the atmosphere.
“For under-inflated exhaust, there is an expansion fan at the nozzle outlet that reduces the pressure to match the background. Jellyfish, in the highlands.” Combs tweeted..
That explains the blob. But what about the brilliance?
According to Combs, this is much easier to square and depends on the timing. The rocket was launched on Thursday morning before dawn (around 5:45 am local time), so Sun Coming directly above the horizon, it illuminated the exhaust plume and shined brightly against the dark sky.
Physics and perfect timing are comparable to space jellyfish. A simple equation for a highland scene.
Of course, if you want to see Genuine Space jellyfish, you need to take a closer look at the universe – about 300 million Light years More precisely. That is how far the galaxy cluster Abel 2877 is. When astronomers recently saw objects with a radio telescope, they saw the ghostly contours of jellyfish swimming in distant space.Or Big jelly in the sky This is also the result of a large gas explosion. In this case, LiveScience previously reported that it was a large-scale eruption from an ancient black hole gaggle.
Originally published on Live Science.