Lunar Lander
Website: https://cislunarspace.cn
Definition
A lunar lander is a spacecraft specifically designed to perform soft landing on the lunar surface, transporting crew, robots, or cargo to the Moon. The lunar lander is the core equipment for lunar exploration missions, and its technical capability directly determines a nation's level of lunar exploration.
Classification
By Purpose
| Type | Description | Representative Examples |
|---|---|---|
| Crewed Lander | Transports astronauts to the lunar surface | Artemis HLS Starship |
| Robotic Lander | Autonomously performs surface missions | Chang'e series, Chandrayaan series |
| Cargo Lander | Transports supplies and equipment | Future commercial lunar cargo |
By Propulsion Type
- Liquid Propulsion Lander: Uses liquid fuel and oxidizer, suitable for precision control
- Solid Propulsion Lander: Uses solid fuel, suitable for simple missions
- Hybrid Propulsion Lander: Combines multiple propulsion methods
By Landing Method
- Direct Landing: Landing directly from lunar orbit
- Hover Landing: Selecting a landing site through hovering
- Airbag Landing: Using airbags to cushion the landing
- Legged Landing: Using landing legs for support
Technical Challenges
Soft Landing Technology
Lunar landing faces several technical challenges:
- Lunar Surface Hazard Avoidance: Real-time hazard detection and avoidance is required
- Fine Descent Control: Precise control is needed during the descent phase from 15 km to 2 km altitude
- Retro-Propulsion Deceleration: In the absence of an atmosphere, deceleration relies entirely on the propulsion system
- Landing Impact Buffering: Absorbing landing impact energy
Navigation, Guidance, and Control
- Terrain-Relative Navigation: Using lunar surface features for navigation
- Microwave Radar Altimeter: Precisely measuring altitude above the lunar surface
- Visual Navigation: Using camera imagery for position estimation
Propulsion System
- Throttleable Engine: Adapting thrust output to the requirements of different descent phases
- Propellant Management: Ensuring reliable propellant delivery in microgravity environments
Development History
Apollo Program (1969-1972)
The Apollo Lunar Module is humanity's most successful crewed lunar lander:
- A total of 6 crewed lunar landings were completed, with 12 astronauts walking on the Moon
- Established the complete body of crewed lunar landing technology
21st Century Lunar Exploration
| Year | Country/Mission | Mission | Result |
|---|---|---|---|
| 2013 | China | Chang'e 3 | Successful soft landing |
| 2019 | Israel | Beresheet | Landing failure |
| 2019 | India | Chandrayaan-2 | Landing failure |
| 2022 | China | Chang'e 5 | Successful sample return |
| 2025 | United States | Artemis III | Planned crewed landing |
Korean Lunar Lander Program
KASA is executing the second phase of its lunar exploration program (2024-2033), with goals including:
- Achieving lunar soft landing before 2032
- Conducting lunar surface scientific exploration and technology demonstrations
- Establishing independent lunar exploration capability
Modern Lunar Landers
Artemis Human Landing System (HLS)
NASA selected SpaceX Starship as the crewed lander for the Artemis program:
- Fully reusable design
- Supports large-scale crew and cargo transportation
- On-orbit refueling enables missions to more distant destinations
China's Chang'e Series
The Chinese Chang'e probe series:
- Chang'e 4: Humanity's first soft landing on the far side of the Moon
- Chang'e 5: Completed lunar sample return
India's Chandrayaan Series
The Indian Chandrayaan series:
- Chandrayaan 3: Successful soft landing in 2023
- Became the fourth country to achieve lunar soft landing
Related Concepts
References
- KASA, "Space Science Exploration Strategic Plan", 2024.
- NASA, "Artemis Plan", 2024.
- China National Space Administration, "Chang'e Lunar Exploration Program", 2024.