OrbitalHub

Wikipedia dixit:

“The Aerojet Rocketdyne RS-25, otherwise known as the Space Shuttle main engine (SSME), is a liquid-fuel cryogenic rocket engine that was used on NASA’s Space Shuttle and is planned to be used on its successor, the Space Launch System.

Designed and manufactured in the United States by Rocketdyne (later known as Pratt & Whitney Rocketdyne and Aerojet Rocketdyne), the RS-25 burns cryogenic liquid hydrogen and liquid oxygen propellants, with each engine producing 1,859 kN (418,000 lbf) of thrust at liftoff. Although the RS-25 can trace its heritage back to the 1960s, concerted development of the engine began in the 1970s, with the first flight, STS-1, occurring on April 12, 1981. The RS-25 has undergone several upgrades over its operational history to improve the engine’s reliability, safety, and maintenance load. Subsequently, the RS-25D is the most efficient liquid fuel rocket engine currently in use.

The engine produces a specific impulse (Isp) of 452 seconds (4.43 km/s) in a vacuum, or 366 seconds (3.59 km/s) at sea level, has a mass of approximately 3.5 tonnes (7,700 pounds), and is capable of throttling between 67% and 109% of its rated power level in one-percent increments. The RS-25 operates at temperatures ranging from −253 °C (−423 °F) to 3300 °C (6000 °F).

The Space Shuttle used a cluster of three RS-25 engines mounted in the stern structure of the orbiter, with fuel being drawn from the external tank. The engines were used for propulsion during the entirety of the spacecraft’s ascent, with additional thrust being provided by two solid rocket boosters and the orbiter’s two AJ-10 orbital maneuvering system engines. Following each flight, the RS-25 engines were removed from the orbiter, inspected, and refurbished before being reused on another mission.”

Video credit: NASA

NASA dixit:

“The Transiting Exoplanet Survey Satellite (TESS) is the next step in the search for planets outside of our solar system, including those that could support life. The mission will find exoplanets that periodically block part of the light from their host stars, events called transits. TESS will survey 200,000 of the brightest stars near the sun to search for transiting exoplanets. The mission is scheduled to launch in 2018.”

Music credit: “Prototype” and “Trial” both from Killer Tracks

Video credit: NASA’s Goddard Space Flight Center

ESA dixit:

“From building to liftoff and installation, these images show the making of European space lab Columbus and its daily use for out-of-this-world research.

Like the transatlantic voyages that Christopher Columbus made half a millennium ago, the Columbus module was meticulously planned, budgeted, scrapped and redesigned before getting the official blessing to build, ship and launch.

The laboratory ascended to orbit aboard Space Shuttle Atlantis from the Kennedy Space Center in Florida, USA on 7 February 2008. Nestling in the spaceplane’s cargo bay, Columbus was accompanied by a seven-man crew.

On 11 February, the crew on the International Space Station captured the new arrival. At that moment, Columbus became Europe’s first permanent human outpost in orbit and Europe became a full partner of the International Space Station.

Columbus houses as many disciplines as possible in a small volume, from astrobiology to solar science through metallurgy and psychology – more than 225 experiments have been carried out during this remarkable decade. Countless papers have been published drawing conclusions from experiments performed in Columbus.”

Video credit: ESA

ESA dixit:

“On 7 February 2008, Space Shuttle Atlantis launched to the International Space Station. In its cargo bay, ESA’s laboratory module Columbus. Now for a decade Columbus has been a part of the ISS. It is the place where ESA astronauts have done countless experiments in microgravity and the scientific importance of the module can hardly be overstated. “

Video credit: ESA

NASA dixit:

“Behind every weather forecast—from your local, five-day prediction to a late-breaking hurricane track update—are the satellites that make them possible. Government agencies depend on observations from weather satellites to inform forecast models that help us prepare for approaching storms and identify areas that need evacuating or emergency first responders.”

Elizabeth Willaman (Willaman Creative): Lead Producer

Andrea S. Martin (SGT): Producer

Kerri Cahoy (MIT): Scientist

Video credit: NASA’s Goddard Space Flight Center

NASA dixit:

“In a test targeted for April 2019 known as Ascent Abort-2, NASA will verify the Orion spacecraft’s launch abort system, a tower on top of the crew module, can steer the capsule and astronauts inside it to safety in the event of an issue with the Space Launch System rocket when the spacecraft is under the highest aerodynamic loads it will experience during ascent for deep-space missions. The test is quick, fast and high, lasting less than three minutes with the test crew module reaching an average speed of Mach 1.5, roughly 1020 miles per hour, at approximately 32,000 feet in altitude.”

Video credit: NASA Johnson