Portuguese 
English 
Spanish 
4 min of reading 
0 comments 
Those red glows, visible to the naked eye and caused by the reentry of the Falcon 9 rockets, are transforming the ionosphere and creating a unique spectacle that lasts up to 10 minutes. Discover how Elon Musk’s SpaceX is revolutionizing the sky and science.
This spectacle, nicknamed “SpaceX Auroras,” is becoming increasingly frequent thanks to the Falcon 9 rockets from Elon Musk’s SpaceX. But what exactly causes this phenomenon? Is it dangerous or just a scientific show? Let’s explore this together.
Despite the name, these “auroras” are not natural phenomena like the northern lights. The term was coined by astronomers to describe the red flashes that appear in the sky during the reentry of the Falcon 9 rockets. These luminous holes are, in fact, temporary perforations in the ionosphere, the layer of the atmosphere rich in ionized gas.
Imagine a stone being thrown into a calm lake, creating temporary waves that soon disappear. Something similar happens when the Falcon 9 engines restart, releasing vapors that temporarily alter the chemical composition of the ionosphere.
-
Starting in 2027, stores will only be able to sell refrigerators of categories A, B, and C, which are, on average, 17% more energy efficient, and the change promises to reduce almost 6 million tons of carbon dioxide by 2030.
-
CEO of a space company states that humans will live on the Moon within this decade and that the base will be an inflatable habitat with life support in a place where no one has set foot for over 50 years.
-
Get ready for three consecutive early mornings of intense cold in Southern Brazil: the cyclone forming this Sunday will draw cold air from the Falkland Islands region, dropping minimum temperatures below 5 degrees Celsius in several cities, and could also bring rough seas to the Rio Grande do Sul coast.
-
A French startup wants to place 3,400 satellites just 375 km from Earth, closer than Starlink, to offer 5G internet directly to mobile phones without needing a special antenna, and has just raised 27 million euros to start challenging the American giants.
How Do These ‘Auroras’ From SpaceX Happen?
The phenomenon occurs about 300 km above the Earth, where the ionosphere is composed of charged particles. During the reentry of the second stage of the Falcon 9 rocket, the engines restart for just two seconds. This brief moment is enough to release about 200 kg of water vapor and carbon dioxide. These substances reduce the local ionization by up to 70%, creating a red glow visible to the naked eye.
The most critical moment is when the rocket leaves its orbit and begins to disintegrate upon reentering the atmosphere. The interaction of the released gases with the particles of the ionosphere creates the chemical alteration that results in the fluorescent red glow.
The reaction between the water vapor and ions in the atmosphere generates a disturbance that lasts up to 10 minutes. The effect, although impressive, does not pose a threat to health or the environment since the gases recombine quickly.
A Spectacle Visible to the Naked Eye
What’s remarkable about this phenomenon is that it can be observed without the need for equipment. Those living in less urbanized areas have a better chance of seeing the “SpaceX Auroras” lighting up the sky. Amateur astronomers report that these flashes occur two to five times a month, depending on the frequency of launches.
If you spot one of these flashes, know that you are witnessing a rare event that is becoming more common due to SpaceX’s rapid pace. In 2023, the company carried out over 90 launches, accounting for 80% of the mass sent into space that year.
The Impact of Launches
Although impressive, these perforations in the ionosphere are temporary and disappear quickly. Scientific studies confirm that the released gases reionize within minutes, without causing permanent damage to the atmosphere or climate.
Compared to other rockets, the Falcon 9 stands out not just for the frequency of its launches but also for the efficiency of its reusable technology. This significantly reduces the environmental impact compared to disposable rockets from decades past.
SpaceX of Elon Musk: Revolution in Space and the Sky
Elon Musk’s SpaceX is not only responsible for spectacles in the sky but also for a revolution in the aerospace industry. With over 5,500 Starlink satellites in operation and a goal of reaching 12,000 in the coming years, the company is transforming the way we connect and explore space.
This high frequency of launches has made the “SpaceX Auroras” a unique phenomenon and, in a sense, a symbol of the company’s impact on science and society.
The rockets from Elon Musk’s SpaceX are literally changing the way we look at the sky. The “SpaceX Auroras” serve as a visual reminder of how science and technology can transform the ordinary into the extraordinary. So, the next time you see a red glow in the sky, know that you are witnessing not just a spectacle, but also the future of space exploration. Fascinating, isn’t it?
-
-
-
15 people reacted to this.