# Mars 6

> space probe

**Wikidata**: [Q909664](https://www.wikidata.org/wiki/Q909664)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Mars_6)  
**Source**: https://4ort.xyz/entity/mars-6

## Summary  
Mars 6 was a Soviet‑built unmanned space probe that was launched on 5 August 1973 aboard a Proton‑K rocket from Baikonur Cosmodrome. It successfully reached Mars and transmitted data until its atmospheric entry, ultimately landing on the Martian surface on 12 March 1974.

## Key Facts  
- **Mission type:** Soviet space probe (also known as *Marsnik 6*).  
- **Launch date:** 5 August 1973.  
- **Launch vehicle:** Proton‑K carrier rocket.  
- **Launch site:** Baikonur Cosmodrome, Site 81/23.  
- **COSPAR ID / NSSDC ID:** 1973‑052A.  
- **Landing date on Mars:** 12 March 1974.  
- **Mission outcome:** Entered Mars atmosphere, transmitted data until loss of signal during descent.  
- **Primary objective:** Study Martian atmosphere and surface conditions.  
- **Image reference:** ![Mars 6](https://commons.wikimedia.org/wiki/Special:FilePath/Mars_6.jpg).  

## FAQs  

### Q: What was the purpose of the Mars 6 mission?  
A: Mars 6 was designed to fly through the Martian atmosphere, collect scientific measurements of pressure, temperature, and composition, and transmit the data back to Earth before its descent capsule was lost.

### Q: How was Mars 6 launched?  
A: The probe was launched on 5 August 1973 using a Soviet Proton‑K carrier rocket from Baikonur Cosmodrome’s Site 81/23.

### Q: Did Mars 6 successfully land on Mars?  
A: Mars 6 entered the Martian atmosphere on 12 March 1974 and transmitted data during descent, but contact was lost before a soft landing could be confirmed.

### Q: What other name is Mars 6 known by?  
A: It is also referred to as *Marsnik 6*.

### Q: Which organization built and operated Mars 6?  
A: The probe was built and operated by the Soviet space program.

## Why It Matters  
Mars 6 represents a pivotal step in the early era of interplanetary exploration, marking the Soviet Union’s continued ambition to study Mars despite the technical challenges of deep‑space communication and atmospheric entry. By transmitting data from within the Martian atmosphere, the mission provided rare, direct measurements of pressure, temperature, and composition that enriched scientific understanding of the Red Planet’s climate and surface conditions. Although the descent capsule was lost before a controlled landing, the partial success demonstrated the feasibility of atmospheric entry probes and informed the design of later missions, both Soviet and international. The data contributed to comparative planetology, helping researchers refine models of atmospheric evolution and assess the potential for past or present habitability on Mars. Consequently, Mars 6 helped lay the groundwork for more sophisticated landers and rovers that followed, cementing its legacy in the broader narrative of human curiosity about our planetary neighbor.

## Notable For  
- First Soviet probe to transmit data from within the Martian atmosphere.  
- Utilized the powerful Proton‑K launch vehicle, showcasing Soviet heavy‑lift capability.  
- Carried the COSPAR designation 1973‑052A, linking it to the global catalog of space missions.  
- Known by the alternate name *Marsnik 6*, reflecting its place in the “Marsnik” series of Soviet Mars attempts.  
- Contributed atmospheric measurements that informed subsequent Mars mission designs.

## Body  

### Mission Overview  
- **Objective:** Investigate Martian atmospheric structure, temperature gradients, and chemical composition.  
- **Program:** Part of the Soviet “Marsnik” series of Mars exploration attempts in the early 1970s.  

### Launch Details  
- **Date & Time:** 5 August 1973.  
- **Vehicle:** Proton‑K, a heavy‑lift carrier rocket developed by the Soviet Union.  
- **Site:** Baikonur Cosmodrome, Kazakhstan, Launch Pad 81/23.  

### Spacecraft Configuration  
- **Probe type:** Unmanned robotic spacecraft (space probe).  
- **Payload:** Atmospheric entry capsule equipped with pressure, temperature, and gas sensors.  
- **Identifiers:** COSPAR ID 1973‑052A; NSSDC ID 1973‑052A; also catalogued as *Marsnik 6*.  

### Journey to Mars  
- **Transit:** Cruise phase lasted several months, employing a heliocentric transfer orbit.  
- **Mars Approach:** Entered Martian sphere of influence in early March 1974.  

### Atmospheric Entry and Landing  
- **Entry Date:** 12 March 1974.  
- **Data Transmission:** Successfully sent telemetry during descent until signal loss, likely due to capsule failure or harsh entry conditions.  
- **Landing Site:** Unconfirmed; mission classified as “landed on Mars” because the entry capsule reached the surface.  

### Scientific Contributions  
- Provided the first Soviet‑recorded in‑situ atmospheric measurements of Mars.  
- Data helped refine models of Martian pressure and temperature profiles.  

### Legacy and Influence  
- Informed design improvements for later Soviet Mars landers (e.g., Mars 7, Mars 9).  
- Demonstrated the viability of using Proton‑K for deep‑space missions, influencing subsequent interplanetary launch strategies.  

### References & Media  
- **Image:** https://commons.wikimedia.org/wiki/Special:FilePath/Mars_6.jpg  
- **Wikidata entry:** “Mars 6” (Q‑identifier not provided).  
- **Related classes:** Space probe (unmanned robotic spacecraft), Proton‑K (carrier rocket).

## References

1. Jonathan's Space Report
2. Freebase Data Dumps. 2013