Space Missions Current Affairs

Gaganyaan Mission: ISRO unveils plans for India’s manned space flight mission

Indian Space Research Organization (ISRO) unveiled details of its first indigenous human space mission dubbed as Gaganyaan to be launched in 2022. The mission was announced by Prime Minister Narendra Modi during his 72nd Independence Day speech. Under it, three Indian astronauts (Gaganyatris) will be taken to space on board Gaganyaan spacecraft by 2022.

This will be the first human space mission to be indigenously developed by ISRO. If successful, India will become fourth nation in the world to send astronaut into space after US, Russia and China. Former Indian Air Force (IAF) Rakesh Sharma was first Indian to travel to space. He was part of the Soviet Union’s Soyuz T-11 expedition, launched on April 2, 1984, of the Intercosmos programme.

Objectives of Gaganyaan Mission: Enhance of science and technology levels in the country, serve as national project involving several institutes, academia and industry, improve of industrial growth, inspire youth, develop technology for social benefits and improve international collaboration.

Key Features of Mission

The entire cost of Gaganyaan mission will be less than Rs 10,000 crore. It will be totally indigenous, very cost-effective mission by Indian standards which is not viable from international standards. Prior to actual launch of this manned mission by 2022, ISRO will launch  two unmanned Gaganyaan missions (first in 30 months’ time and then 36 months).

Launch Phase: GSLV Mk-III launch vehicle will be used to launch Gaganyaan as it has necessary payload capability for this mission. The spacecraft will comprise of crew module and service module that constitute orbital. It weighs approximately 7 tonnes and will be placed in low earth orbit (LEO) of 300-400 km. Crew module’s size will be 3.7 meters and of service module will be 7 meters.

Orbital Phase: The mission will send three-member crew to space for period of five to seven days. The launch vehicle will take off from spaceport of Sriharikota, Andhra Pradesh and it will reach desired orbit in 16 minutes. The crew will be selected by Indian Air Force (IAF) and ISRO jointly after which they will undergo training for two-three years. It will conduct microgravity experiment during the mission.

Re-entry phase: The velocity of whole module will be reduced and will be turned in opposite direction so that it can start to come down. When it will reach distance of 120 km from Earth’s surface, service module will be removed and separated out. The module carrying crew alone will come back to earth, this will take about 36 minutes to reach Earth. ISRO is planning to land crew module in Arabian Sea, closer to Gujarat coast or in Bay of Bengal or even on land from where the crew will be recovered

Execution time: The mission may be executed six months before India completes its 75th Independence Day in 2022. It is expected to be completed before 2022.

Support technology developed by ISRO for Gaganyaan Mission

So far, ISRO has developed some critical technologies required manned space mission like re-entry mission capability, crew escape system, crew module configuration, thermal protection system, deceleration and floatation system and sub-systems of life support system. Some of these technologies have been demonstrated successfully through Space Capsule Recovery Experiment (SRE-2007), Crew module Atmospheric Reentry Experiment (CARE-2014) and Pad Abort Test (2018). These technologies will enable ISRO in accomplishing programme objectives in short span of 4 years.

Month: Categories: Science and Technology Current Affairs - 2018

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Parker Solar Probe: NASA to launch Humanity’s first flight to Sun in July 2018

NASA’s will launch humanity’s first mission Parker Solar Probe (PSP) to the Sun in July 31, 2018. It is undergoing final preparations for its scheduled launch on board of NASA’s Delta IV Heavy launch vehicle from Kennedy Space Centre in Florida. After its launch, the probe will orbit directly through solar atmosphere — the corona — closer to surface than any human-made object has ever gone.

Parker Solar Probe mission

It is NASA’s first planned robotic spacecraft to study outer corona of Sun. It has been designed and built by Johns Hopkins University Applied Physics Laboratory. It is named after solar astrophysicist Eugene Parker, first spacecraft of NASA to be named after living person.

The spacecraft is designed to endure harsh environment near Sun, by approaching within 8.5 solar radii (5.9 million kilometers) to ‘surface’ (photosphere) of Sun where incident solar intensity is approximately 520 times intensity at Earth orbit.

The probe will be fitted with thermal protection system (TPS) or heat shield made of reinforced carbon-carbon composite that will allow it to survive temperatures in Sun’s corona. It main systems and scientific instruments are located in central portion of shield’s shadow, where direct radiation from Sun is fully blocked.

The primary power for mission is dual system of solar panels (photovoltaic array). Secondary source consists of much smaller secondary array power that uses pumped-fluid cooling to maintain operating temperature.

Scientific goals of PSP

  • Determine structure and dynamics of magnetic fields at sources of solar wind.
  • Trace flow of energy that heats corona and accelerates solar wind.
  • Determine what mechanisms accelerate and transport energetic particles.
  • Explore dusty plasma near Sun and its influence on solar wind and energetic particle formation.

In its seven-year mission, PSP will explore Sun’s outer atmosphere and make critical observations to answer questions about physics of stars. Its data will also be useful in improving forecasts of major eruptions on Sun and subsequent space weather events that impact technology on Earth, as well as satellites and astronauts in space.

Month: Categories: Science and Technology Current Affairs - 2018

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