# Pioneer 9

> NASA space probe

**Wikidata**: [Q11699469](https://www.wikidata.org/wiki/Q11699469)  
**Source**: https://4ort.xyz/entity/pioneer-9

## Summary
Pioneer 9 was a NASA space probe launched in 1968 to study interplanetary space, particularly solar wind and cosmic rays. It was part of the Pioneer 6-9 series, designed as unmanned robotic spacecraft to explore beyond Earth's orbit.

## Key Facts
- Launched on **November 8, 1968**, at **09:46:29 UTC** from **Cape Canaveral Space Launch Complex 17B**.
- Operated by **NASA** and manufactured by **TRW Inc.**.
- Mass at launch: **147 kg**, with dimensions of **0.94 m diameter** and **0.81 m height**.
- Powered by a **79-watt** nominal power output system.
- Launched using a **Delta E** expendable rocket (flight number **479 / D-060**).
- Lost signal in **1983** after years of operation.
- Part of the **Pioneer 6, 7, 8, and 9** series of space probes.
- Also known by the alias **Pioneer D**.

## FAQs
### Q: What was the purpose of Pioneer 9?
A: Pioneer 9 was designed to study interplanetary space, including solar wind, cosmic rays, and magnetic fields, as part of NASA's early space exploration efforts.

### Q: When was Pioneer 9 launched?
A: It was launched on **November 8, 1968**, from Cape Canaveral, Florida.

### Q: How long did Pioneer 9 operate?
A: The probe remained operational until **1983**, when contact was lost.

### Q: What rocket launched Pioneer 9?
A: It was launched using a **Delta E** rocket, a U.S. expendable launch vehicle.

### Q: What were Pioneer 9's dimensions?
A: The probe had a **diameter of 0.94 meters** and a **height of 0.81 meters**, with a launch mass of **147 kg**.

## Why It Matters
Pioneer 9 was a critical part of NASA's early efforts to explore interplanetary space, providing valuable data on solar wind, cosmic radiation, and magnetic fields. As one of the first successful deep-space probes, it helped lay the foundation for future missions, including later Pioneer probes and Voyager spacecraft. Its long operational life (until 1983) demonstrated the feasibility of extended space missions, contributing to our understanding of space weather and its effects on Earth. The Pioneer 6-9 series also pioneered techniques for monitoring solar activity, which remains essential for satellite communications and power grid protection today.

## Notable For
- Being part of the **first series of NASA space probes** dedicated to studying interplanetary space.
- Operating for **over 14 years**, far exceeding initial expectations.
- Providing **early data on solar wind and cosmic rays**, advancing space weather research.
- Using a **Delta E rocket**, an important launch vehicle in early U.S. space exploration.
- Serving as a precursor to later deep-space missions like **Pioneer 10 and 11**.

## Body
### Overview
Pioneer 9 was an unmanned robotic spacecraft classified as a **space probe**, meaning it did not orbit Earth but instead explored deeper into space. It was the fourth in the **Pioneer 6-9 series**, following **Pioneer 8** and preceding **Pioneer 10**.

### Launch and Mission Details
- **Launch Date:** November 8, 1968, at **09:46:29 UTC**.
- **Launch Site:** **Cape Canaveral Space Launch Complex 17B**.
- **Launch Vehicle:** **Delta E** (flight number **479 / D-060**).
- **Operator:** **National Aeronautics and Space Administration (NASA)**.
- **Manufacturer:** **TRW Inc.**

### Technical Specifications
- **Mass:** **147 kg** (launch weight).
- **Dimensions:**
  - **Diameter:** 0.94 meters.
  - **Height:** 0.81 meters.
- **Power Output:** **79 watts** (nominal).
- **Identifiers:**
  - **COSPAR ID:** 1968-100A.
  - **NSSDCA ID:** 1968-100A.

### Mission Timeline
- **1968:** Successfully launched and began transmitting data.
- **1983:** Lost signal, ending its operational life.

### Scientific Contributions
Pioneer 9, along with its sister probes (Pioneer 6, 7, and 8), was designed to monitor **solar wind, cosmic rays, and magnetic fields** in interplanetary space. These missions provided foundational data for understanding space weather and its impact on Earth's magnetosphere.

### Legacy
The Pioneer 6-9 series demonstrated the viability of long-duration space missions, paving the way for more ambitious projects like the **Voyager program**. Pioneer 9's data contributed to early models of solar activity, which remain relevant for modern satellite operations and space exploration.

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  "description": "NASA space probe launched in 1968 to study interplanetary space, including solar wind and cosmic rays.",
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## References

1. Jonathan's Space Report
2. [Pioneer  9](https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1968-100A)