# Planetary Explorer-A

> The Planetary Explorer series, which is in the definition phase and has not yet been authorized (as of July 1971), is intended to advance the exploration of Venus through the use of both orbiter and atmospheric probe missions

**Wikidata**: [Q113129872](https://www.wikidata.org/wiki/Q113129872)  
**Source**: https://4ort.xyz/entity/planetary-explorer-a

## Summary
The Planetary Explorer-A is a planned space probe intended to advance Venus exploration through both orbiter and atmospheric probe missions, though it was still in the definition phase and not yet authorized as of July 1971.

## Key Facts
- The Planetary Explorer-A is a space probe designed for Venus exploration
- It was part of the Planetary Explorer series
- The mission would involve both orbiter and atmospheric probe components
- It was intended to use a Delta launch vehicle
- As of July 1971, the mission was in the definition phase and not yet authorized
- Its NSSDC identification code is PLEX-A
- The probe would explore Venus through multiple mission components

### Q: What was the Planetary Explorer-A?
A: It was a planned space probe intended to explore Venus through orbiter and atmospheric probe missions, though it was still in the definition phase and not yet authorized as of July 1971.

### Q: What was the purpose of the Planetary Explorer-A?
A: The mission was intended to advance Venus exploration through both orbiter and atmospheric probe missions.

### Q: What launch vehicle was planned for the Planetary Explorer-A?
A: The Delta launch vehicle was planned for the Planetary Explorer-A mission.

## Why It Matters
The Planetary Explorer-A represented an ambitious approach to Venus exploration during the early 1970s, reflecting the growing interest in studying Earth's closest planetary neighbor. At a time when Venus remained largely mysterious, this mission would have provided comprehensive data through both orbital observations and direct atmospheric sampling. The planned combination of orbiter and atmospheric probe capabilities would have offered unprecedented insights into Venus's surface conditions, atmospheric composition, and overall planetary characteristics. This approach represented a significant step forward in planetary exploration technology and scientific understanding, though the mission never progressed beyond the planning phase.

## Notable For
- The mission would have combined both orbital and atmospheric probe capabilities for Venus exploration
- It was part of a broader Planetary Explorer series of missions
- The Delta launch vehicle was selected for the mission
- The probe was designed to study Venus through multiple scientific instruments
- The mission was still in the definition phase as of July 1971 and not yet authorized

### Mission Concept
The Planetary Explorer-A mission would have utilized a dual approach to Venus exploration, combining an orbiter to conduct wide-area observations with an atmospheric probe to gather direct measurements from within the planet's dense atmosphere. This approach would have provided comprehensive data about Venus's surface features, atmospheric composition, and temperature profiles. The mission represented an advanced scientific strategy for studying Venus, though it never progressed beyond the planning stage.

### Technical Specifications
- The probe would have been launched using a Delta expendable launch system
- It would have included both orbital and atmospheric components
- The mission was classified as a space probe (unmanned robotic spacecraft)
- The NSSDC identification code was PLEX-A
- The mission was intended to advance scientific understanding of Venus's characteristics

### Timeline
- As of July 1971, the mission was in the definition phase
- The mission had not yet been authorized for implementation
- The Delta launch vehicle was selected as the launch platform
- The overall Planetary Explorer series was still in development stages

### Scientific Objectives
The planned mission would have focused on multiple scientific objectives including:
- Mapping Venus's surface features from orbit
- Analyzing atmospheric composition and temperature profiles
- Studying the planet's magnetic field and radiation environment
- Investigating Venus's geological history and surface processes
- Comparing Venus's characteristics with Earth's to understand planetary evolution

### Mission Architecture
The Planetary Explorer-A would have consisted of two primary components:
1. **Orbiter**: To conduct wide-area imaging and atmospheric monitoring from orbit
2. **Atmospheric Probe**: To descend through Venus's atmosphere and return data from within the planet's environment

This dual-component approach would have provided complementary data sets that could be cross-referenced to create a more complete understanding of Venus's characteristics.