Description: Flights to the Planets USSR Venus IV Venera 4 Space Block of 4 Stamps MNH Venera 4 (Russian: Венера-4 meaning Venus 4), also designated 1V (V-67) s/n 310 was a probe in the Soviet Venera program for the exploration of Venus. The probe comprised an entry probe, designed to enter the Venus atmosphere and parachute to the surface, and a carrier/flyby spacecraft, which carried the entry probe to Venus and served as a communications relay for the entry probe. In 1967 it was the first successful probe to perform in-place analysis of the environment of another planet. Venera 4 provided the first chemical analysis of the Venusian atmosphere, showing it to be primarily carbon dioxide with a few percent of nitrogen and below one percent of oxygen and water vapors. While entering the atmosphere it became the first spacecraft to survive entry into another planet's atmosphere. The station detected a weak magnetic field and no radiation field. The outer atmospheric layer contained very little hydrogen and no atomic oxygen.[citation needed] The probe sent the first direct measurements proving that Venus was extremely hot, that its atmosphere was far denser than expected, and that it had lost most of its water long ago. Fast & Free Shipping within U.S.A. We Care for your order, Pack it carefully and ship it within 24 hours. Satisfaction Guaranteed! Please explore our store for more stamps, souvenir sheets, post-office collectibles and philately books and pre-philatelic items: montecinos.philately
Price: 16.45 USD
Location: Round Top, New York
End Time: 2024-12-30T19:01:43.000Z
Shipping Cost: 0 USD
Product Images
Item Specifics
Restocking Fee: No
Return shipping will be paid by: Seller
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
Certification: Uncertified
Grade: Ungraded
Quality: Mint Never Hinged/MNH
Type: Souvenir Sheet
Color: Multi-Color
