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Original source: DECODE con DaniNovarama
This video from DECODE con DaniNovarama covered a lot of ground. Streamed.News selected 8 key moments and summarises them here. Everything below links directly to the timestamp in the original video.
What does reentry actually feel like? Beyond freefall, it is a collision of extreme physics and engineering, where survival hinges on how a spacecraft sheds heat and endures crushing forces. Understanding it reveals the true fragility — and resilience — of human spaceflight.
Orion capsule faces 2,700°C temperatures during atmospheric reentry
After its lunar journey, the Orion capsule returns to Earth on gravity alone, reaching speeds of up to 40,000 km/h. The most critical phase is reentry, where a ceramic heat shield — engineered to char and shed heat — protects the craft from temperatures exceeding 2,700°C, hot enough to melt steel. Deceleration peaks at 6 to 8 Gs, and the capsule becomes wrapped in incandescent plasma, temporarily cutting communications with mission control and raising tension on the ground.
The procedure highlights the engineering precision and material toughness required to bring astronauts home safely — the capsule's descent likened to a flaming meteorite. From managing extreme deceleration to deploying parachutes for an ocean splashdown, the mission underscores how far spacecraft technology has matured.
"What Orion does to return to Earth is simply fall. There is no great technology involved, as such."
▶ Watch this segment — 1:11:18
Spacecraft use 'stellar GPS' and gyroscopes to navigate to the Moon
Missions like Artemis rely on sophisticated navigation systems to orient rockets through the void. With no terrestrial GPS available, ultra-sensitive cameras continuously photograph star fields and use reverse triangulation against databases of thousands of stars to pinpoint the craft's exact position. Inertial navigation complements this, using gyroscopes to control orientation across three axes to within tenths of a degree.
Together, these systems feed an onboard computer that solves equations with 12 degrees of freedom — position, orientation, velocity, and acceleration across three components — in real time. That precision is essential: the Moon moves at 3,600 km/h at a distance of 400,000 km. A small miscalculation can send a trajectory irreversibly off course.
"We are talking about throwing a dart at a moving target from hundreds of thousands of kilometres away — and hitting the bullseye."
Artemis follows complex lunar path using trans-lunar injection and orbit insertion maneuvers
Artemis reaches the Moon in stages. The mission begins with a parking orbit roughly 180 km above Earth, where engineers run exhaustive systems checks. Once everything is confirmed, the craft executes Trans-Lunar Injection (TLI) — a burn that accelerates it from 8 km/s to 11 km/s, breaking free of Earth's gravity and setting it on a three-day journey to the Moon.
As the craft approaches, lunar gravity pulls it faster, requiring a second critical maneuver: Lunar Orbit Insertion (LOI). Engines fire against the direction of travel, slowing the craft enough for the Moon's gravity to capture it into stable orbit. TLI and LOI are cornerstones of modern astronautics, delivering the precision that interplanetary missions demand.
"TLI — I escape Earth, I head for the Moon. LOI — I brake and enter lunar orbit."
▶ Watch this segment — 1:06:14
Artemis life support: bottled air and chemical CO2 scrubbing — no urine recycling
Orion's life support system differs sharply from the International Space Station's, reflecting the mission's shorter duration. Astronauts breathe an Earth-like gas mix — 78% nitrogen, 21% oxygen — stored in high-pressure tanks sized for 10 to 21 days. Apollo used pure oxygen, a choice that proved catastrophic: the Apollo 1 fire killed three astronauts. Artemis uses a mixed atmosphere to avoid that risk.
To keep the air breathable, the system continuously injects oxygen and scrubs carbon dioxide with chemical canisters and cabin fans. Internal pressure holds at roughly 10 PSI — slightly below sea level — to reduce structural stress on the vehicle. Unlike the ISS, Artemis carries no urine-recycling system; the hardware would cost too much weight. Astronauts drink stored water and waste is vented to space.
"The entire Artemis mission isn't built for longevity like the International Space Station — everything is disposable."
Artemis talks to Earth via the Deep Space Network — with a 2-second delay
Artemis communicates with Earth using electromagnetic waves traveling at the speed of light. But the Moon is roughly 380,000 km away, adding about one second each way — meaning every exchange with the crew carries a two-second lag. To maintain continuous coverage despite Earth's rotation, NASA's Deep Space Network (DSN) relies on three antenna complexes spaced 120 degrees apart: Goldstone, California; Robledo de Chavela, Spain; and Canberra, Australia.
Data rates from Artemis run between 0.1 and 2 megabits per second — up to a thousand times slower than home Wi-Fi. That bandwidth gap explains why mission footage often arrives compressed or low-resolution. When the spacecraft passes behind the Moon, the signal cuts out entirely for roughly 40 minutes, leaving the crew with no contact with Earth — a hard reminder of the physical limits of deep-space communication.
"Artemis gives us between 0.1 and 2 megabits per second depending on conditions and distance. That's far slower than a home internet connection."
▶ Watch this segment — 1:01:21
Artemis launch: 10 minutes of 3Gs and violent shaking before weightlessness hits
Launching on Artemis is a physical and sensory ordeal. What begins as a deceptively slow liftoff quickly becomes a wall of vibration — like sitting on a massive machine as it roars to life. That shaking gives way to sustained acceleration of roughly 3Gs, pinning crew members into their seats with a force comparable to the drop on a rollercoaster. Unlike a fairground ride over in seconds, this lasts ten minutes — long enough to make speaking and breathing a genuine effort.
The spacecraft flies itself throughout. Onboard computers handle all navigation; the crew monitors readouts and reports status but does not pilot the vehicle. The defining moment comes at Main Engine Cut Off (MECO): engines shut down instantly, and 3Gs of crushing acceleration vanishes into silence and weightlessness. Astronauts describe it as almost angelic — a stark contrast to the violence of the minutes before.
"The feeling of a rollercoaster — for a literal 10 minutes."
Artemis Space Diet: Dehydrated Food and Tortillas to Prevent Crumbs
Food aboard the Artemis mission is carefully engineered to meet astronauts' nutritional and operational needs in space. Each crew member consumes roughly 2,000 calories daily, mostly dehydrated foods that resist bacterial growth, limit odors, and cut cargo weight. Astronauts rehydrate these meals using potable water from the spacecraft's tanks, which also serves as drinking water.
One notable choice: tortillas instead of bread. They offer the same nutritional value without producing crumbs that could jam equipment or drift through the cabin. Salt and pepper are liquid for the same reason. Unlike the International Space Station, Artemis does not recycle urine — it is vented overboard, a practical weight-saving decision for a shorter mission. The diet also addresses psychological wellbeing, incorporating desserts and spicy foods to compensate for the dulled sense of taste astronauts experience in microgravity.
"Tortillas have the same nutritional value as bread, but without the crumbs. Notice how something invented 500 or 600 years ago turns out to have applications in space."
Rocket Launch Safety: Sparks for Hydrogen and a Water Pool to Absorb the Blast
Launching a rocket involves extreme safety measures and advanced technologies refined over decades by agencies like NASA, designed to protect both infrastructure and crew. The sparks visible at a rocket's base before liftoff are not igniters — they are burners that combust any leaking hydrogen before it can accumulate. This step is essential to prevent premature explosions and ensure ignition occurs under controlled conditions.
Equally critical is the millions-of-liters water pool beneath the launch pad. Water is continuously injected at high pressure to absorb the enormous shockwave, intense heat, and deafening sound produced by the engines. The water vaporizes almost instantly, dissipating that energy before it can reflect off the ground and cause catastrophic structural damage to the rocket itself. These systems reflect the engineering precision required to safely send vehicles into space.
"The water pool just got absolutely obliterated — the rocket hit it so hard the water vaporized in a second."
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Summarised from DECODE con DaniNovarama · 1:24:24. All credit belongs to the original creators. Streamed.News summarises publicly available video content.