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The International Space Station (ISS) is a multi-nation construction project that is the largest single structure humans ever put into space. Its main construction was completed between 1998 and 2011, although the station continually evolves to include new missions and experiments. It has been continuously occupied since Nov. 2, 2000.

The ISS is not owned by one single nation and is a “co-operative programme” between Europe, the United States, Russia, Canada and Japan, according to the European Space Agency (ESA). 

As of April 2021, 244 individuals from 19 countries have visited the International Space Station. Top participating countries include the United States (153 people) and Russia (50 people). Astronaut time and research time on the space station is allocated to space agencies according to how much money or resources (such as modules or robotics) that they contribute. The ISS includes contributions from 15 nations. NASA (United States), Roscosmos (Russia) and the European Space Agency are the major partners of the space station who contribute most of the funding; the other partners are the Japanese Aerospace Exploration Agency and the Canadian Space Agency.

Current plans call for the space station to be operated through at least 2024, with the partners discussing a possible extension until 2028. Afterwards, plans for the space station are not clearly laid out. It could be deorbited, or recycled for future space stations in orbit.

Crews aboard the ISS are assisted by mission control centers in Houston and Moscow and a payload control center in Huntsville, Ala. Other international mission control centers support the space station from Japan, Canada and Europe. The ISS can also be controlled from mission control centers in Houston or Moscow. 

Credit : Space.com

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European Space Agency (ESA), French Agence Spatiale Européenne (ASE), European space and space-technology research organization founded in 1975 from the merger of the European Launcher Development Organisation (ELDO) and the European Space Research Organisation (ESRO), both established in 1964. ESA has 22 Member States. Members include Austria, Belgium, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Luxembourg, the Netherlands, Norway, Poland, Portugal, Romania, Spain, Sweden, Switzerland, and the United Kingdom. Slovenia is an associate member. Cooperative agreements have been signed by various countries, including Canada (1981), which participate in some ESA projects. Headquarters of the agency are in Paris.

Representatives of ESA’s member nations form the agency’s policy-making council. A science program committee established by convention deals with matters related to the mandatory science program; other such bodies may be formed by the council to assist in decision making. The chief executive and legal representative of ESA is the director general, assisted by an inspector general and the directors of various departments.

The principal components of the organization are (1) the European Space Research and Technology Centre (ESTEC), located in Noordwijk, Netherlands, which houses the satellite project teams and testing facilities and is the agency’s main space science and technological research centre, (2) the European Space Operations Centre (ESOC), located in Darmstadt, Germany, which is concerned with satellite control, monitoring, and data retrieval, (3) the European Space Research Institute (ESRIN), located in Frascati, Italy, which supports the ESA Information Retrieval Service and the Earthnet program, the system by which remote sensing images are retrieved and distributed, (4) the European Astronaut Centre (EAC), located in Cologne, Germany, which is a training centre, and (5) the European Space Astronomy Centre (ESAC), located in Villafranca del Castillo, Madrid, Spain, which holds scientific operations centres as well as archives. ESA also operates the Guiana Space Centre (CSG), a launch base in French Guiana.

Credit : Britannica 

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SpaceX was formed by entrepreneur Elon Musk in the hopes of revolutionizing the aerospace industry and making affordable spaceflight a reality. The company entered the arena with the Falcon 1 rocket, a two-stage liquid-fueled craft designed to send small satellites into orbit. The Falcon 1 was vastly cheaper to build and operate than its competitors, a field largely populated by spacecraft built by publicly owned and government-funded companies such as Lockheed Martin and Boeing. Part of the rocket’s cost-effectiveness was made possible by the SpaceX-developed Merlin engine, a cheaper alternative to those used by other companies. SpaceX also focused on making reusable rockets (other launch vehicles are generally made for one-time use).

In March 2006 SpaceX made its first Falcon 1 launch, which began successfully but ended prematurely because of a fuel leak and fire. By this time, however, the company had already earned millions of dollars in launching orders, many of them from the U.S. government. In August of that year SpaceX was a winner of a NASA competition for funds to build and demonstrate spacecraft that could potentially service the ISS after the decommissioning of the space shuttle. Falcon 1 launches that failed to attain Earth orbit followed in March 2007 and August 2008, but in September 2008 SpaceX became the first privately owned company to send a liquid-fueled rocket into orbit. Three months later it won a NASA contract for servicing the ISS that was worth more than $1 billion.

In 2010 SpaceX first launched its Falcon 9, a bigger craft so named for its use of nine engines, and the following year it broke ground on a launch site for the Falcon Heavy, a craft the company hoped would be the first to break the $1,000-per-pound-to-orbit cost barrier and that might one day be used to transport astronauts into deep space. In December 2010 the company reached another milestone, becoming the first commercial company to release a spacecraft—the Dragon capsule—into orbit and successfully return it to Earth. Dragon again made history on May 25, 2012, when it became the first commercial spacecraft to dock with the ISS, to which it successfully delivered cargo. In August that year, SpaceX announced that it had won a contract from NASA to develop a successor to the space shuttle that would transport astronauts into space.

Credit : Britannica 

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The Indian Space Research Organization (ISRO) is the pioneer space exploration agency of the Government of India, headquartered at Bengaluru. ISRO was formed in 1969 with a vision to develop and harness space technology in national development, while pursuing planetary exploration and space science research. ISRO replaced its predecessor, INCOSPAR (Indian National Committee for Space Research), established in 1962 by India’s first Prime Minister Pt. Jawaharlal Nehru and scientist Vikram Sarabhai, considered amongst the founding fathers of Indian space program.

ISRO, by successfully demonstrating its unique and cost-effective technologies, has gained place among the elite space agencies in the world over the years. The first Indian satellite, Aryabhata, was built by the ISRO and launched with the help of the Soviet Union on April 19, 1975. The year 1980 marked the launch of Rohini, which was the first satellite to be successfully placed in the orbit by SLV-3, an Indian made launch vehicle. Subsequently with more efforts, two other rockets were developed by ISRO: the PSLV (Polar Satellite Launch Vehicle) for placing satellites into polar orbits and the GSLV (Geosynchronous Satellite Launch Vehicle) for placing satellites into geostationary orbits. Both the rockets have successfully launched several earth observation and communication satellites for India as well as other countries.

Indigenous satellite navigation systems like IRNSS and GAGAN have also been deployed. In January 2014, ISRO used an indigenously built cryogenic engine for a GSLV-D5 launch of the GSAT-14 satellite making it one of the only six countries in the world to develop a cryogenic technology. Most recent and remarkable space probes of ISRO include Chandrayaan-1 lunar orbiter, Mars Orbiter Mission (Mangalyaan-1) and ASTROSAT space observatory. The success of the Mars Orbiter Mission made India only the fourth country in the world to reach the Martian orbit.

Credit : The Economic Times

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Jeff Bezos is an internet entrepreneur and the founder of Blue Origin, a private spaceflight company. The company is known for its work on New Shepard — a reusable suborbital space rocket that includes a crew capsule for future paying passengers. 

Blue Origin's New Shepard rocket is counting down for its first crewed flight on July 20, when it will launch Bezos and three others into space. 

In 2000, shortly after Bezos was named Time's Person of the Year for his work with Amazon, he turned his attention to space. He founded Blue Origin, which would develop a vertical-takeoff, vertical-landing rocket ship that could pop passengers into suborbital space.

Bezos kept his plans under wraps for years, Space.com previously reported. Most of the company's information came out through mandatory disclosures to the Federal Aviation Administration and NASA as Bezos sought regulatory approvals and funding.

It wasn't until the late 2000s when Blue Origin had a detailed website and promotional materials available on it, in stark contrast to other billionaire-run spaceflight companies, such as SpaceX and Virgin Galactic.

In 2011, Blue Origin faced a major setback, when a vehicle was destroyed during a test. Bezos revealed the failure a week after the fact in a short blog post on Blue Origin's website, explaining that a flight instability affected the angle of attack and ultimately caused the vehicle to crash.

In October 2012, Blue Origin revealed it had conducted a successful rocket escape test, which is a key milestone in rating the spacecraft safe for humans to ride. Although the system is supposed to work on the suborbital spacecraft, the company also plans to use the technology for its orbital flights.

Credit : Space.com

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