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Archive for 2020

August 12, 2020

Starship SN5

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Wikipedia dicit:

The SpaceX Starship is a fully reusable super heavy-lift launch vehicle under development by SpaceX since 2012, as a self-funded private spaceflight project.

The second stage of the Starship — is designed as a long-duration cargo and passenger-carrying spacecraft. It is expected to be initially used without any booster stage at all, as part of an extensive development program to prove out launch-and-landing and iterate on a variety of design details, particularly with respect to the vehicle’s atmospheric reentry.

While the spacecraft will be tested on its own at suborbital altitudes, it will be used on orbital launches with an additional booster stage, the Super Heavy, where the spacecraft will serve as the second stage on a two-stage-to-orbit launch vehicle.

Integrated system testing of a proof of concept for Starship began in March 2019, with the addition of a single Raptor rocket engine to a reduced-height prototype, nicknamed Starhopper — similar to Grasshopper, an equivalent prototype of the Falcon 9 reusable booster. Starhopper was used from April through August 2019 for static testing and low-altitude, low-velocity flight testing of vertical launches and landings in July and August 2019. More prototype Starships are under construction and are expected to go through several iterations. All test articles have a 9 metres (30 ft) of diameter stainless steel hull.

SpaceX is planning to launch commercial payloads using Starship no earlier than 2021. In April 2020, NASA selected a modified human rated Starship system as one of three lunar landing systems to receive funding for a 10-month long initial design phase for the Artemis program.

Video credit: SpaceX

 

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August 11, 2020

Crew Dragon Demo-2 Splashdown

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Wikipedia dicit:

Crew Dragon Demo-2 (officially Crew Demo-2, SpaceX Demo-2, or Dragon Crew Demo-2) was the first crewed test flight of the Crew Dragon spacecraft. The spacecraft, named Endeavour, launched on 30 May 2020 at 19:22:45 UTC and carried NASA astronauts Douglas Hurley and Robert Behnken to the International Space Station in the first crewed orbital spaceflight launched from the United States since the final Space Shuttle mission, STS-135, in 2011, and the first ever operated by a commercial provider. Demo-2 was also the first two-person orbital spaceflight launched from the United States since STS-4 in 1982.

Demo-2 was intended to complete the validation of crewed spaceflight operations using SpaceX hardware and to receive human-rating certification for the spacecraft, including astronaut testing of Crew Dragon capabilities on orbit. During their time aboard, Behnken conducted four spacewalks with fellow American astronaut Chris Cassidy to replace batteries brought up by a Japanese cargo vehicle.

Docking and undocking operations were autonomously controlled by the Crew Dragon, but monitored by the flight crew in case manual intervention becomes necessary. The spacecraft soft docked with the International Space Station at 14:16 UTC on 31 May 2020. Following soft capture, 12 hooks were closed to complete a hard capture 11 minutes later. Hurley and Behnken worked alongside the crew of Expedition 63 for 62 days. Endeavour autonomously undocked from the station at 23:35 UTC on 1 August 2020 and returned the astronauts to Earth on 2 August 2020 in the first water landing by astronauts since 1975.

Endeavour will be refurbished and reused for the SpaceX Crew-2 mission, expected to launch in February 2021. Crew Dragon’s next mission, SpaceX Crew-1 — SpaceX’s first operational astronaut flight — is slated to fly with four Expedition 64 astronauts in late September 2020.

Video credit: NASA/SpaceX

 

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August 10, 2020

Atlas V Mars 2020 Launch

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Wikipedia dicit:

Atlas V is the fifth major version in the Atlas rocket family. It is an expendable launch system originally designed by Lockheed Martin, now being operated by United Launch Alliance (ULA), a joint venture between Lockheed and Boeing.

Each Atlas V rocket consists of two main stages. The first stage is powered by a Russian RD-180 engine manufactured by RD Amross and burning kerosene and liquid oxygen. The Centaur upper stage is powered by one or two US RL10 engine(s) manufactured by Aerojet Rocketdyne and burning liquid hydrogen and liquid oxygen. AJ-60A strap-on solid rocket boosters (SRBs) are used in some configurations and will be replaced by GEM-63 SRBs in the near future. The standard payload fairings are 4 or 5 meters in diameter with various lengths.

Video credit: ULA

 

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July 29, 2020

Landsat Legacy

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NASA dicit:

Landsat 9 is the latest satellite to continue the legacy of global observations of Earth’s land surface. With unmatched longevity, accuracy, and coverage, the Landsat program has been the cornerstone of global land imaging since 1972. Landsat 9 continues this tradition, and will carry us into the next 50 years of Earth observations. The two instruments aboard will make the most advanced measurements of any Landsat satellite.

Design and construction of the spacecraft and its instruments is managed by NASA’s Goddard Space Flight Center in Greenbelt, Maryland, and operation and archiving of the data is managed by the U.S. Geological Survey. Goddard and Ball Aerospace each built one of the instruments, and the spacecraft was built by Northrop Grumman.

The Landsat Program is a series of Earth-observing satellite missions jointly managed by NASA and the U.S. Geological Survey (USGS). Landsat satellites have been consistently gathering data about our planet since 1972. They continue to improve and expand this unparalleled record of Earth’s changing landscapes for the benefit of all.

Video credit: NASA’s Goddard Space Flight Center/Matthew R. Radcliff (USRA): Lead Producer/Aaron E. Lepsch (ADNET): Technical Support/Matthew R. Radcliff (USRA): Editor/Matthew R. Radcliff (USRA): Narrator/Kate Ramsayer: Writer/Jeffrey Masek (NASA/GSFC): Scientist/Music Marble Place by Matias Suescun [SACEM], published by KTSA Publishing [SACEM], available from Universal Production Music

 

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July 28, 2020

Atlas V Mars 2020 Mission Profile

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ULA dicit:

A United Launch Alliance Atlas V 541 rocket will launch NASA’s Perseverance rover to Mars. The spacecraft will explore the Jezero Crater to study the planet’s habitability, seek signs of past microbial life, collect and store samples of selected rock and soil and prepare for future human missions. The rover also carries the Ingenuity helicopter, a technology demonstration to prove that powered flight can be achieved at Mars.

Video credit: United Launch Alliance

 

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July 27, 2020

Getting Perseverance Ready for Travel

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NASA dicit:

In February 2020, NASA’s Perseverance Rover began its long journey to Mars by first traveling across the United States. The rover was built at NASA’s Jet Propulsion Laboratory in Southern California and then carefully packed and flown to NASA’s Kennedy Space Center in Cape Canaveral, Florida. There, engineers integrated the rover with the spacecraft that carries it to Mars, and the Atlas V rocket chosen to send it on its way.

Video credit: NASA Jet Propulsion Laboratory

 

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