1960’s USA NASA Mariner II VENUS MISSION CHEMISTRY Old Proof Silver MEDAL i96425

$1,177.00 $1,059.30

Availability: 1 in stock

SKU: i96425 Category:

Item: i96425

Authentic Medal of:

United States
Mariner II – Venus Exploration
USA NASA Commemorative Medal
1960’s Silver Medal 38mm (26.61 grams) 0.925 Sterling Silver
FIRST EXPLORATION OF VENUS ATMOSPHERE * MARINER II, Satellite orbiting Venus, moon behind.
AUGUST 27, 1962. Mariner space-craft, traveling 48 million miles reached Venus on December 14 and transmitted information on the planet’s temperature and chemical make-up back to the Earth., Venus and four stars above.

You are bidding on the exact item pictured, provided with a Certificate of Authenticity and Lifetime Guarantee of Authenticity.


Mariner 2.jpgMariner 2 (Mariner-Venus 1962), an American space probe to Venus, was the first robotic space probe to conduct a successful planetary encounter. The first successful spacecraft in the NASA Mariner program, it was a simplified version of the Block I spacecraft of the Ranger program and an exact copy of Mariner 1. The missions of the Mariner 1 and 2 spacecraft are sometimes known as the Mariner R missions. Original plans called for the probes to be launched on the Atlas-Centaur, but serious developmental problems with that vehicle forced a switch to the much smaller Agena B second stage. As such, the design of the Mariner R vehicles was greatly simplified. Far less instrumentation was carried than on the Soviet Venera probes of this period—for example, forgoing a TV camera—as the Atlas-Agena B had only half as much lift capacity as the Soviet 8K78 booster. The Mariner 2 spacecraft was launched from Cape Canaveral on August 27, 1962, and passed as close as 34,773 kilometers (21,607 mi) to Venus on December 14, 1962.

The Mariner probe consisted of a 100 cm (39.4 in) diameter hexagonal bus, to which solar panels, instrument booms, and antennas were attached. The scientific instruments on board the Mariner spacecraft were: two radiometers (one each for the microwave and infrared portions of the spectrum), a micrometeorite sensor, a solar plasma sensor, a charged particle sensor, and a magnetometer. These instruments were designed to measure the temperature distribution on the surface of Venus and to make basic measurements of Venus’ atmosphere.

The primary mission was to receive communications from the spacecraft in the vicinity of Venus and to perform radiometric temperature measurements of the planet. A second objective was to measure the interplanetary magnetic field and charged particle environment.

En route to Venus, Mariner 2 measured the solar wind, a constant stream of charged particles flowing outwards from the Sun, confirming the measurements by Luna 1 in 1959. It also measured interplanetary dust, which turned out to be scarcer than predicted. In addition, Mariner 2 detected high-energy charged particles coming from the Sun, including several brief solar flares, as well as cosmic rays from outside the Solar System. As it flew by Venus on December 14, 1962, Mariner 2 scanned the planet with its pair of radiometers, revealing that Venus has cool clouds and an extremely hot surface.


Frequently Asked Questions

Mr. Ilya Zlobin, world-renowned expert numismatist, enthusiast, author and dealer in authentic ancient Greek, ancient Roman, ancient Byzantine, world coins & more.
Mr. Ilya Zlobin, world-renowned expert numismatist, enthusiast, author and dealer in authentic ancient Greek, ancient Roman, ancient Byzantine, world coins & more.

Who am I dealing with?

You are dealing with Ilya Zlobin, ancient coin expert, enthusiast, author and dealer with an online store having a selection of over 15,000 items with great positive feedback from verified buyers and over 10 years experience dealing with over 57,000 ancient and world coins and artifacts. Ilya Zlobin is an independent individual who has a passion for coin collecting, research and understanding the importance of the historical context and significance all coins and objects represent. Most others are only concerned with selling you, Ilya Zlobin is most interested in educating you on the subject, and providing the largest selection, most professional presentation and service for the best long-term value for collectors worldwide creating returning patrons sharing in the passion of ancient and world coin collecting for a lifetime.

How long until my order is shipped?

Orders are shipped by the next business day (after receipt of payment) most of the time.

How will I know when the order was shipped?

After your order has shipped, you will be left positive feedback, and that date could be used as a basis of estimating an arrival date. Any tracking number would be found under your ‘Purchase history’ tab.

USPS First Class mail takes about 3-5 business days to arrive in the U.S. International shipping times cannot be estimated as they vary from country to country.

Standard international mail to many countries does not include a tracking number, and can also be slow sometimes. For a tracking number and signature confirmation, you may want to do Express Mail International Shipping, which costs more, however, is the fastest and most secure. Additionally you may be able to receive your order in as little as 3-5 business days using this method. For Express Mail International, it may be possible to place up to 10-15 items in one package (for the one shipping cost) as it is flat rate envelope, which may be the most cost-effective, secure and fastest way to receive items internationally. Send me a message about this and I can update your invoice should you want this method.

Getting your order to you, quickly and securely is a top priority and is taken seriously here. Great care is taken in packaging and mailing every item securely and quickly.

Please be aware, I cannot take responsibility for any postal service delivery delays, especially for international packages as it may happen in rare instances.

What is a certificate of authenticity and what guarantees do you give that the item is authentic?

Each of the items sold here, is provided with a Certificate of Authenticity, and a Lifetime Guarantee of Authenticity, issued by a world-renowned numismatic and antique expert that has identified over 57,000 ancient coins and has provided them with the same guarantee. You will be very happy with what you get with the COA; a professional presentation of the coin, with all of the relevant information and a picture of the coin you saw in the listing. Additionally, the coin is inside it’s own protective coin flip (holder), with a 2×2 inch description of the coin matching the individual number on the COA.

On the free-market such a presentation alone, can be considered a $25-$50 value all in itself, and it comes standard with your purchases from me, FREE. With every purchase, you are leveraging my man

Item: i96355

Authentic Medal of:

United States
Men In Space Series: Gemini XII
USA Moon Landing Commemorative Medal
1970’s Silver Medal 35mm (23.55 grams) 0.925 Sterling Silver
EXTENDED SPACE WALKS LOVELL – ALDRIN, Astronaut tethered to capsule, floating in space.
GEMINI XII MISSION: DETERMINE ABILITY OF ASTROAUTS TO WORK IN SPACE ROCKET: TITAN 2 REVOLUTIONS: 39 DISTANCE 1,628,510 MILES NOVEMBER 11, 1966, Logo above.

You are bidding on the exact item pictured, provided with a Certificate of Authenticity and Lifetime Guarantee of Authenticity.


S66-63536.jpgGemini 12 (officially Gemini XII) was a 1966 crewed spaceflight in NASA’s Project Gemini. It was the 10th and final crewed Gemini flight (Gemini 1 and Gemini 2 were uncrewed missions), the 18th crewed American spaceflight, and the 26th spaceflight of all time, including X-15 flights over 100 kilometers (54 nmi). Commanded by Gemini VII veteran James A. Lovell, the flight featured three periods of extravehicular activity (EVA) by rookie Edwin “Buzz” Aldrin, lasting a total of 5 hours and 30 minutes. It also achieved the fifth rendezvous and fourth docking with an Agena target vehicle.

Gemini XII marked a successful conclusion of the Gemini program, achieving the last of its goals by successfully demonstrating that astronauts can effectively work outside of spacecraft. This was instrumental in paving the way for the Apollo program to achieve its goal of landing a man on the Moon by the end of the 1960s.

Liftoff of the Atlas/Agena Target Vehicle occurred at 2:07:59 PM EST, and of the Gemini/Titan spacecraft at 3:46:33 PM EST, on November 11. All launch vehicle systems performed nominally during powered flight, but at staging there was a recurrence of the first stage oxidizer tank rupture first seen on Gemini 10’s launch. On Gemini 12, the fuel tank appeared to have also ruptured as a white cloud was seen emitting from the spent stage along with the orange nitrogen tetroxide. Another episode of “Green Man” also occurred at SECO, referring to pitch gyrations caused by pressure buildup in the second stage protective skirt.

At the completion of the previous Gemini flight, the program still had not demonstrated that an astronaut could work easily and efficiently outside the spacecraft. Prior to the Gemini XII mission, other astronauts from previous missions of the Gemini Program had attempted EVAs. However, their successes were limited due to a lack of proper restraints and insufficient techniques. In preparation for Gemini XII new, improved restraints were added to the outside of the capsule, and a new technique—underwater training—was introduced, which would become a staple of future space-walk simulation. The main purpose of the Gemini XII mission was to find and test new ways to work outside of a spacecraft safely and effectively. Aldrin’s two-hour, 20-minute tethered space-walk, during which he photographed star fields, retrieved a micrometeorite collector and did other chores, at last demonstrated the feasibility of extravehicular activity. Two more stand-up EVAs also went smoothly, as did the by-now routine rendezvous and docking with an Agena which was done “manually” using the onboard computer and charts when a rendezvous radar failed. The climb to a higher orbit, however, was canceled because of a problem with the Agena booster.

During orbital injection, the GATV engine experienced a drop in turbopump speed lasting about 2.5 seconds. After this, pump performance returned to normal. Telemetry data indicated erratic pump speeds, but engine performance did not reflect this. The anomaly was later found as a brief 30 psi drop in the thrust chamber of the rocket. The mission had planned for an orbital maneuver into a higher orbit but the drop in pressure raised some concerns. Ground controllers decided not to risk the planned orbital boost maneuver since the exact reason for the pump slowdown was unclear. Following Gemini 12’s reentry and during the GATV’s 63rd orbit, they attempted to fire the propulsion system, but a stuck fuel valve prevented engine start from occurring.

It was suspected that a turbopump bearing failure caused the anomalous conditions during orbital injection, followed by heating and melting of pump components. The inability of ground controllers to start the engine during the 63rd orbit was possibly due to melted or loose debris blocking the fuel valve and preventing its operation. The telemetry data falsely reporting erratic pump speed was concluded to be debris being knocked around and affecting the data probes.

The 1994 book and documentary Moon Shot, as well as the 2008 documentary When We Left Earth: The NASA Missions, credits the spacewalk innovations, including the underwater training, to Aldrin himself.

Gemini 12 was designed to perform rendezvous and docking with the Agena target vehicle, to conduct three extra-vehicular activity (EVA) operations, to conduct a tethered stationkeeping exercise, to perform docked maneuvers using the Agena propulsion system to change orbit, and demonstrate an automatic reentry.

When Gemini 12 was being planned, one of the possibilities raised was the potential for the flight to be run in conjunction with the first Apollo mission, which had been tentatively scheduled for the last quarter of 1966. By May 1966, delays in making Apollo ready for flight just by itself, and the extra time needed to incorporate compatibility with the Gemini, made that impractical. This became moot when slippage in readiness of the Apollo spacecraft caused the last-quarter 1966 target date to be missed, and the Apollo mission was rescheduled for February 21, 1967.

The 14 scientific experiments were (1) frog egg growth under zero-g, (2) synoptic terrain photography, (3) synoptic weather photography, (4) nuclear emulsions, (5) airglow horizon photography, (6) UV astronomical photography, and (7) dim sky photography. Two micrometeorite collection experiments, as well as three space phenomena photography experiments, were not fully completed.

The capsule was controlled on reentry by computer and splashed down 4.8 kilometers from its target. The crew were taken aboard the aircraft carrier USS Wasp.

The Gemini 12 mission was supported by the following U.S. Department of Defense resources; 9,775 personnel, 65 aircraft and 12 ships.

Postflight medical examination disclosed no unusual conditions in either astronaut. Both were slightly exhausted and dehydrated due to problems with the spacecraft’s water supply system forcing them to reduce their fluid intake on the last day of the mission and Lovell had a mild case of pinkeye.


Frequently Asked Questions

Mr. Ilya Zlobin, world-renowned expert numismatist, enthusiast, author and dealer in authentic ancient Greek, ancient Roman, ancient Byzantine, world coins & more.
Mr. Ilya Zlobin, world-renowned expert numismatist, enthusiast, author and dealer in authentic ancient Greek, ancient Roman, ancient Byzantine, world coins & more.

Who am I dealing with?

You are dealing with Ilya Zlobin, ancient coin expert, enthusiast, author and dealer with an online store having a selection of over 15,000 items with great positive feedback from verified buyers and over 10 years experience dealing with over 57,000 ancient and world coins and artifacts. Ilya Zlobin is an independent individual who has a passion for coin collecting, research and understanding the importance of the historical context and significance all coins and objects represent. Most others are only concerned with selling you, Ilya Zlobin is most interested in educating you on the subject, and providing the largest selection, most professional presentation and service for the best long-term value for collectors worldwide creating returning patrons sharing in the passion of ancient and world coin collecting for a lifetime.

How long until my order is shipped?

Orders are shipped by the next business day (after receipt of payment) most of the time.

How will I know when the order was shipped?

After your order has shipped, you will be left positive feedback, and that date could be used as a basis of estimating an arrival date. Any tracking number would be found under your ‘Purchase history’ tab.

USPS First Class mail takes about 3-5 business days to arrive in the U.S. International shipping times cannot be estimated as they vary from country to country.

Standard international mail to many countries does not include a tracking number, and can also be slow sometimes. For a tracking number and signature confirmation, you may want to do Express Mail International Shipping, which costs more, however, is the fastest and most secure. Additionally you may be able to receive your order in as little as 3-5 business days using this method. For Express Mail International, it may be possible to place up to 10-15 items in one package (for the one shipping cost) as it is flat rate envelope, which may be the most cost-effective, secure and fastest way to receive items internationally. Send me a message about this and I can update your invoice should you want this method.

Getting your order to you, quickly and securely is a top priority and is taken seriously here. Great care is taken in packaging and mailing every item securely and quickly.

Please be aware, I cannot take responsibility for any postal service delivery delays, especially for international packages as it may happen in rare instances.

What is a certificate of authenticity and what guarantees do you give that the item is authentic?

Each of the items sold here, is provided with a Certificate of Authenticity, and a Lifetime Guarantee of Authenticity, issued by a world-renowned numismatic and antique expert that has identified over 57,000 ancient coins and has provided them with the same guarantee. You will be very happy with what you get with the COA; a professional presentation of the coin, with all of the relevant information and a picture of the coin you saw in the listing. Additionally, the coin is inside it’s own protective coin flip (holder), with a 2×2 inch description of the coin matching the individual number on the COA.

On the free-market such a presentation alone, can be considered a $25-$50 value all in itself, and it comes standard with your purchases from me, FREE. With every purchase, you are leveraging my many years of experience to get a more complete context and understanding of the piece of history you are getting. Whether your goal is to collect or give the item as a gift, coins presented like this could be more prized and valued higher than items that were not given such care and attention to.

Buy a coin today and own a piece of history, guaranteed.

Is there a money back guarantee?

I offer a 30 day unconditional money back guarantee. I stand behind my coins and would be willing to exchange your order for either store credit towards other coins, or refund, minus shipping expenses, within 30 days from the receipt of your order. My goal is to have the returning customers for a lifetime, and I am so sure in my coins, their authenticity, numismatic value and beauty, I can offer such a guarantee.

When should I leave feedback?

Once you receive your order, please leave a positive feedback. Please don’t leave any negative feedbacks, as it happens sometimes that people rush to leave feedback before letting sufficient time for their order to arrive. Also, if you sent an email, make sure to check for my reply in your messages before claiming that you didn’t receive a response. The matter of fact is that any issues can be resolved, as reputation is most important to me. My goal is to provide superior products and quality of service.

How and where do I learn more about collecting ancient coins?

Visit the “Guide on How to Use My Store” for on an overview about using my store, with additional information and links to all other parts of my store which may include educational information on topics you are looking for.

y years of experience to get a more complete context and understanding of the piece of history you are getting. Whether your goal is to collect or give the item as a gift, coins presented like this could be more prized and valued higher than items that were not given such care and attention to.

Buy a coin today and own a piece of history, guaranteed.

Is there a money back guarantee?

I offer a 30 day unconditional money back guarantee. I stand behind my coins and would be willing to exchange your order for either store credit towards other coins, or refund, minus shipping expenses, within 30 days from the receipt of your order. My goal is to have the returning customers for a lifetime, and I am so sure in my coins, their authenticity, numismatic value and beauty, I can offer such a guarantee.

When should I leave feedback?

Once you receive your order, please leave a positive feedback. Please don’t leave any negative feedbacks, as it happens sometimes that people rush to leave feedback before letting sufficient time for their order to arrive. Also, if you sent an email, make sure to check for my reply in your messages before claiming that you didn’t receive a response. The matter of fact is that any issues can be resolved, as reputation is most important to me. My goal is to provide superior products and quality of service.

How and where do I learn more about collecting ancient coins?

Visit the “Guide on How to Use My Store” for on an overview about using my store, with additional information and links to all other parts of my store which may include educational information on topics you are looking for.

  • Selection Required: Select product options above before making new offer.
  • Offer Sent! Your offer has been received and will be processed as soon as possible.
  • Error: There was an error sending your offer, please try again. If this problem persists, please contact us.

Make Offer

To make an offer please complete the form below:
$
Please wait...
YEAR

1970's

TYPE

Medal

COUNTRY/REGION OF MANUFACTURE

United States

CIRCULATED/UNCIRCULATED

Unknown

COMPOSITION

Silver

MPN

1970's United States a88c07db-34c

Shopping Cart