Artemis II: Todo lo que tienes que saber antes del HISTÓRICO lanzamiento

What to Expect from the Upcoming Artemis Mission?

Introduction to the Artemis Mission

• The upcoming launch marks a significant event, the first manned mission to the Moon since 1972, with four astronauts aboard.

• Understanding the historical context and details of this mission is crucial for appreciating its significance, including potential risks acknowledged by NASA.

The Purpose of Artemis

• The Artemis program aims to answer a long-standing question: when will humans return to the Moon? The last human visit was during Apollo 17 in December 1972.

• Advances in technology now allow for not just exploration but also plans for establishing a lunar base, which is essential for future Mars missions.

Launch Vehicle Breakdown

• The launch vehicle consists of two main components: the Space Launch System (SLS) rocket and the Orion spacecraft.

• SLS is currently the most powerful operational rocket globally, generating nearly 4,000 tons of thrust at liftoff—surpassing even Saturn V's capabilities used in Apollo missions.

Rocket Components and Functionality

• SLS features four RS25 engines previously used in space shuttle missions; three have flown before on multiple occasions.

• Solid rocket boosters (SRBs) provide most thrust initially and are jettisoned shortly after launch.

Orion Spacecraft Details

• Orion comprises three stacked elements; its crew module is designed for deep-space missions lasting up to 21 days.

• Named "Integrity," this capsule houses astronauts and includes life support systems necessary for their survival during space travel.

European Contribution to Orion

• Below the crew module lies a European service module built by Airbus that manages temperature control and life-support functions critical for astronaut safety.

• Spain plays a vital role in this mission through Airbus Crisa's contributions, marking a historic collaboration between NASA and non-U.S. companies in critical aerospace technology.

Artemis 2 Mission Overview

Key Components of the Artemis 2 Mission

• The mission involves a spacecraft carrying four humans around the Moon for the first time in over fifty years. The launch vehicle includes an essential structure known as the emergency escape tower, which is about 13 meters tall and designed to separate the crew capsule from the rocket in case of an emergency.

• The emergency escape system features three solid-fuel engines that provide thrust to quickly distance the capsule from danger. This system has only been activated once during a real mission, specifically with a Soyuz rocket. It is hoped that Artemis 2 will not require this activation.

Mission Objectives and Trajectory

• Artemis 2 is planned to last ten days, aiming to reach and circle the Moon before returning to Earth. The trajectory chosen does not allow for orbiting around the Moon due to limitations in spacecraft performance; instead, it utilizes a free-return trajectory that leverages lunar gravity for efficient travel back home.

• The Orion spacecraft will approach from the far side of the Moon (the "dark side"), coming within a few thousand meters at its closest point while reaching distances up to approximately 450,000 km away from Earth—potentially setting a record for human distance traveled beyond our planet.

Communication Challenges

• During their passage behind the Moon, astronauts will lose communication with Earth due to lunar obstruction, creating an isolated environment where they are completely cut off except for internal sounds within their spacecraft. This moment emphasizes both excitement and solitude as they venture into deep space.

Pre-launch Preparations

• Prior to launching towards the Moon, several critical operations must occur in low Earth orbit after liftoff. Three hours post-launch, astronauts will conduct an important experiment involving proximity operations with spent rocket stages as targets for manual piloting demonstrations—a crucial skill for future missions requiring docking maneuvers with lunar landers like SpaceX's Starship or Blue Origin's Blue Moon.

• Successful completion of this demonstration is vital since any failure in automatic docking systems during future missions could jeopardize crew safety; thus, manual maneuvering skills are essential for astronaut training and preparedness. Following this test, further checks on navigation systems and communications must be validated before proceeding with translunar injection (TLI).

Translunar Injection Process

• Once TLI occurs—marking a point of no return—the Orion spacecraft will exit Earth's gravitational influence at high speed; this phase requires precise trajectory corrections through additional small burns after initial injection to ensure accurate arrival near the Moon’s vicinity for safe return flight paths back home. This method was previously utilized successfully during Apollo missions when unexpected issues arose with damaged vessels needing assistance back home via physics alone rather than propulsion systems alone.

• After four days en route, Orion will reach its closest approach at about six kilometers above lunar surface level—close enough for astronauts aboard to witness extraordinary views of our celestial neighbor while also being allowed personal smartphones onboard during this historic journey!

Preparation for Incredible Lunar Missions

Astronauts' Scientific Work

• Astronauts will not simply gaze out of the window; they have scientific tasks to complete, including documenting lunar craters, soil textures, color variations, and surface reflectivity.

• This observational data will assist Earth scientists in better interpreting the Moon's geological history and preparing for future landing missions.

The Avatar Experiment

• An intriguing onboard experiment named "Avatar" involves astronauts placing their own bone marrow cells into a chip.

• Bone marrow is crucial as it is the most radiation-sensitive organ in the human body, producing red and white blood cells as well as platelets.

Understanding Radiation Effects

• There is limited knowledge about how deep space radiation affects humans since no one has been beyond Earth's magnetic field since the Apollo missions.

• Past studies on radiation effects were not prioritized during earlier missions due to lack of resources and focus.

Mission Control and Return Trajectory

Communication with Astronauts

• As the spacecraft passes behind the Moon on its return journey, mission control in Houston will interview astronauts while their memories are fresh.

Return Trajectory Adjustments

• NASA plans several trajectory correction burns during the return phase to ensure precise re-entry into Earth's atmosphere.

Thermal Shield Concerns

Issues with Orion's Thermal Shield

• The thermal shield from Artemis 1 showed significant damage with over 100 points where material had detached.

• Investigations concluded that if there had been a crew aboard during Artemis 1, they likely would have survived despite concerns about safety.

Manufacturing Changes Impacting Safety

• The thermal shield material (AF Code), used since Apollo missions, underwent manufacturing changes that led to unexpected vulnerabilities during re-entry.

Re-entry Strategy Adjustments

Skip Reentry Technique

• Orion employs a skip reentry method to avoid extreme temperatures by bouncing through the atmosphere rather than entering directly.

New Trajectory for Artemis 2

• For Artemis 2, adjustments include a steeper descent angle to minimize gas accumulation within the shield during re-entry.

Final Descent and Recovery Operations

Speed and Temperature Challenges

• The capsule will enter at approximately 40,000 km/h—marking it as the fastest re-entry for a crewed spacecraft—while enduring exterior temperatures near 2,800º C.

Recovery Process Post-Landing

• After splashdown in the Pacific Ocean near San Diego, U.S. Navy ships and helicopters will be ready for astronaut recovery and medical evaluations before returning them to Houston.

Crew Selection Insights

Overview of Crew Members

• Four astronauts were selected by Raid Wiseman for this mission; he humorously appointed himself as commander before resigning from his position.

This structured summary captures key insights from each segment of the transcript while providing timestamps for easy reference.

Astronauts of the Artemis Mission

Key Members of the Artemis Crew

• Crew Composition: The mission features a highly experienced team, including Raid Wiseman, who previously visited the International Space Station (ISS) in 2014.

• Victor Glover's Historic Role: Victor Glover will be the first non-white astronaut to travel beyond low Earth orbit, marking a significant milestone in over 60 years of human space exploration.

• Cristina Koch's Record: Cristina Koch holds the record for the longest continuous spaceflight by a woman at 328 days and will become the first woman to travel to lunar orbit.

• Jeremy Hansen's Contribution: Jeremy Hansen from the Canadian Space Agency is notable as the first non-American astronaut to venture beyond low Earth orbit.

Risks Associated with Artemis Missions

• Crew Loss Probability: NASA has set a maximum crew loss probability of 1 in 40 for outbound journeys and 1 in 30 for lunar surface operations during Artemis missions.

• Statistical Implications: Statistically, launching multiple missions under these probabilities could result in potential crew losses.

• Historical Context on Risk Assessment: Historical data shows that early estimates often underestimate risks; for instance, initial assessments for shuttle flights suggested a loss probability of 1 in 100 but later revealed it was closer to 1 in 10.

Current Limitations and Future Aspirations

• Lack of Rescue Capability: Currently, NASA lacks an immediate rescue capability during emergencies on Artemis missions, highlighting inherent risks in human space exploration.

• Heroism of Astronauts: Astronauts are recognized as heroes for accepting these risks to push human boundaries and explore new frontiers.

Vision for Lunar Exploration

• Permanent Lunar Bases: The mission aims not only to return humans to the Moon but also establish permanent bases at lunar poles, fostering competition and collaboration between nations like China and the U.S.

• Future Mars Missions: This mission is seen as a stepping stone towards future manned missions to Mars, with expectations that humans will live and work on other celestial bodies within years.