A SpaceX Falcon 9 rocket transformed the predawn sky over the eastern United States into a spectacular display on October 13, 2026, producing a glowing, jellyfish-shaped cloud that could be seen far beyond its Florida launch site.
The rocket lifted off at 6:33 a.m. EDT (10:33 UTC) from Space Launch Complex 40 at Cape Canaveral Space Force Station, carrying a Dragon cargo spacecraft toward the International Space Station (ISS) for NASA.
As Falcon 9 climbed into the upper atmosphere, sunlight illuminated its expanding exhaust, creating a luminous formation that resembled a gigantic jellyfish floating through the sky. The unusual spectacle was captured by observers across multiple East Coast states, with Space.com documenting photographs and eyewitness observations of the display.
Despite its otherworldly appearance, the phenomenon has a well-understood scientific explanation involving rocket exhaust, atmospheric pressure, and the timing of sunrise.
What Causes a Rocket 'Space Jellyfish'?
A space jellyfish forms when a rocket's exhaust expands high above Earth and becomes illuminated by sunlight while the surrounding sky remains relatively dark.
Near the ground, atmospheric pressure helps constrain the hot gases escaping a rocket engine. As the vehicle ascends into thinner air, the surrounding pressure decreases, allowing its exhaust plume to spread outward more dramatically.
The expanding gases and particles can form broad, curved structures with wispy trails. Depending on the rocket's trajectory, engine activity, and viewing angle, these formations may resemble the rounded body and trailing tentacles of a jellyfish.
Sunlight provides the second essential ingredient. Shortly before sunrise, the ground and lower atmosphere may still be in shadow, even though sunlight is already reaching higher altitudes. When those rays illuminate the expanding exhaust, the plume can appear brilliantly white or bluish against the darker background.
The same effect can occur shortly after sunset, when high-altitude exhaust remains sunlit after the Sun has disappeared below the horizon for people on the ground.
NASA's Astronomy Picture of the Day has previously highlighted this phenomenon, illustrating how sunlight interacting with rocket exhaust can produce enormous glowing shapes in the sky.
The October 13 display was therefore not evidence of an explosion, an unidentified spacecraft, or a new astronomical discovery. It was an atmospheric optical spectacle produced during an otherwise routine phase of a rocket launch.
Why Was the SpaceX Launch Visible So Far Away?
The enormous apparent size of the plume helps explain why people hundreds of miles from Cape Canaveral could observe the launch. As Falcon 9 gained altitude, its exhaust spread across an increasingly large region of the upper atmosphere, becoming visible from distant locations with a sufficiently clear view.
Altitude also changes how far an object can be seen. Earth's curvature limits visibility near the surface, but an object high above the planet can remain within the line of sight of observers separated by considerable distances.
For the October 13 launch, the contrast between the illuminated exhaust and the relatively dark morning sky made the plume particularly conspicuous.
Reports and photographs documented the spectacle across portions of the eastern United States, including sightings in New Jersey and Pennsylvania. However, visibility varied with cloud cover, local viewing conditions, and the observer's position relative to the rocket's flight path.
Independent spaceflight reporting provided another important detail. Spaceflight Now documented how the Falcon 9 booster's exhaust and the upper-stage plume interacted while sunlight illuminated them, adding to the striking appearance of the launch.
Although the glowing formation appeared enormous, its size in the sky should not be confused with the physical dimensions of the rocket. Observers were seeing sunlight scattered by a broad, expanding exhaust plume rather than the spacecraft itself filling such a large area.
What Was SpaceX Launching?
Behind the atmospheric spectacle was an important cargo delivery for the International Space Station.
The flight, designated CRS-35, was SpaceX's 35th commercial resupply mission to the orbiting laboratory for NASA.
According to NASA's October 13 mission announcement, Dragon launched with more than 6,300 pounds (approximately 2,860 kilograms) of scientific equipment, supplies, and station hardware.
Among the most significant items aboard are the final pair of International Space Station Roll-Out Solar Arrays, known as iROSAs.
These additional solar arrays are intended to increase the station's available electrical power, supporting research, everyday operations, and preparations for the orbital laboratory's eventual controlled deorbit. Astronauts are expected to install the arrays during spacewalks planned for later in the fall.
Dragon is also transporting equipment for several scientific investigations, including:
- Artificial retina manufacturing: Research into producing artificial retinal materials in microgravity, with potential future applications in vision restoration.
- Heart tissue models: Three-dimensional cardiac tissue research intended to improve understanding of biological processes and support future drug testing.
- Brain organoids: Laboratory-grown tissue models designed to investigate processes associated with neurological diseases.
- Advanced glass research: Experiments exploring how unconventional glass materials form in microgravity and whether their properties could benefit future technologies.
These investigations are research projects rather than completed breakthroughs. Their potential medical and technological benefits will depend on experimental results and additional validation.
What Happens Next for the Dragon Spacecraft?
Following the successful October 13 launch, Dragon separated from Falcon 9's upper stage approximately nine minutes after liftoff and began its journey toward the International Space Station.
According to the official SpaceX CRS-35 mission schedule, Dragon is expected to autonomously dock with the space-facing port of the station's Harmony module on Thursday, October 15, at approximately 11 a.m. EDT (15:00 UTC).
Before docking, the spacecraft must perform a series of orbital maneuvers to gradually align its trajectory with the station. After a successful approach and docking, the crew can begin procedures to access and unload its cargo.
NASA plans to provide live coverage of the rendezvous and docking beginning at 9:15 a.m. EDT through NASA's official live-streaming platforms.
The spacecraft is scheduled to remain at the ISS until approximately mid-November before returning to Earth with completed experiments and other cargo. NASA expects Dragon to splash down off the California coast.
For observers on Earth, the glowing jellyfish lasted only briefly. For the astronauts and researchers awaiting Dragon's arrival, however, the launch marks the beginning of another round of scientific work aboard the International Space Station.
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