In 2015 Russian Ministry of Communications issued the postal stationery devoted to the Cosmonautic Day. The cover is cancelled with the "Cosmonautic Day” official post mark with the date setting mechanism in Moscow on April 12, 2015. Total edition is 2 000 000 envelops.
Academician Mikhail Reshetnev is scientists, designers, one of the founders of the Soviet (Russian) Cosmonautics. Reschetnjow arbeitete zudem an Steuersystemen, die die korrekte Ausrichtung eines Satelliten gewährleisten sollen. Des Weiteren forschte er im Gebiet der Raumfahrtphysik.
The Russian postal stationery (a post card) devoted to Reshetnev’s 90th birthday anniversary.
The official special post cancellations took place in the city of Krasnojarsk and in the town of Zheleznogorsk.
On April 28, 2015 at 10:09 UTC the “Progress M-27M” unmanned supply spacecraft was launched from Baykonur Cosmodrome to the International Space Station. The spacecraft was orbited by the “Soyuz-2.1A” rocket-carrier. Due to a number of malfunctions occurred after orbitting, the docking of the spacecraft with the International Space Station was cancelled.
On April 27, 2015 at 23:03 UTC the “Falcon-9” rocket-carrier was launched from Cape Canaveral launch site of US Air Force. The launch was performed by the "SpaceX” private company supported by the 45th Space Wing of US Air Force. The rocket orbited TurkmenAlem52E / MonacoSat telecommunication satellite. Made by Thales Alenia Space the satellite is designed for a lifetime of at least 16 years. Ground controllers will park the spacecraft in geostationary orbit at 52 degrees east longitude, where the satellite will hover over the equator as it circles Earth at the same speed of the planet’s rotation. The 52 degrees east slot is registered to Monaco by the International Telecommunications Union. The operating location and Monaco’s role in the mission help give the TurkmenAlem52E/MonacoSat satellite its unusual name.
On April 26, 2015 at 20:00 UTC the “Ariane-5ECA” rocket-carrier was launched from Kourou Cosmodrome in French Guiana. The rocket orbited the Norwegian “Thor-7” and the Italian “Sircal-2” (Syracuse-3C) telecommunications satellites.
On April 17, 2015 at 13:29 UTC the private U.S. unmanned supply spacecraft, the Dragon (SpX CRS-6 flight), was successfully docked to the International Space Station. The linkup operation was carried out with the help of the giant 17-meter Canadarm. The capture with Canadarm-2 was performed by Italian astronaut Samantha Cristoforetti at 10:55 UTC. The Dragon spacecraft was maneuvered into position and attached to a berthing port on the space station's Harmony module. The unmanned spacecraft delivered about 2 tons of supplies for the space station crew and for experiments being conducted aboard the ISS. An animal habitat with 20 mice, 600,000 tomato speeds, plant and worm specimens and spare parts for the space station’s air revitalization system were also delivered by the Dragon.
On April 14, 2015 at 20:10 UTC the "Falcon 9” rocket-carrier was launched from the Cape Canaveral US Air Force Station in Florida. The launch was performed by the "SpaceX” private company supported by the 45th Space Wing of US Air Force. US private company SpaceX launched its "Dragon” (CRS-6 flight) unmanned spacecraft on a sixth cargo resupply mission to the International Space Station. CRS means Commercial Resupply Services. The Dragon spacecraft is carrying about 2,015 kilograms of supplies for the space station crew and for experiments being conducted aboard the ISS. It is the 8th flight of a “Dragon” spacecraft and the 7th flight of a “Dragon” to the ISS.