A film to be made on ISRO scientists

A film is going to be made on ISRO scientists and actor tuned director ISRO scientists is going to helm this film. He is going to portray “unforgettable human stories” through his films and his new venture will see him document the “shocking and moving” tale of ISRO scientist Nambi Narayanan. Versatile actor and Malayalam superstar Mohanlal will act in lead role in the film.

NASA's Mars Curiosity Rover

NASA's Mars Curiosity Rover, expected to land on the Red planet in three weeks, is NASA's most advanced robotic mission yet.

The Curiosity rover, also called the Mars Science Laboratory, was launched in November 2011. The rover is expected to land on Mars on the night of Aug. 5 PDT. The $2.5 billion rover will touch down at Gale Crater, and is designed to search for clues that Mars could be now, or in the ancient past, a habitable planet for microbial life.

Space Junk-The Waste in space

Don Kessler, the creator of the said-to-be-famous “Kessler Syndrome” theory? In the late 70s, Kessler, a now retired NASA scientist, penned a seminal paper called: “Collision Frequency of Artificial Satellites: The Creation of a Debris Belt”. In it he wrote: “As the number of artificial satellites in earth orbit increases, the probability of collisions between satellites also increases. Satellite collisions would produce orbiting fragments, each of which would increase the probability of further collisions, leading to the growth of a belt of debris around the earth. This process parallels certain theories concerning the growth of the asteroid belt. The debris flux in such an earth-orbiting belt could exceed the natural meteoroid flux, affecting future spacecraft designs.”

Kessler used a mathematical model to project the rate at which the asteroid belt he described in his paper would form, and came to the conclusion that, given the right conditions, the debris-filled belt could form as early as this century.

Now, in earth terms you’d hardly call something that passed by you with kilometres to spare a miss, but in space a couple of kilometres is what one calls a close shave. Then there’s the fact that a NASA satellite fell to earth last year, and a Russian probe dropped out of the sky this year.

Photo: The Father of Space Junk, Donald Kessler. (Photo courtesy of Space Junk 3D, LLC.) 

But the problem isn’t so much space debris falling to earth because about 70% of the planet is water and smaller pieces of space junk invariably burn up on entry into earth’s atmosphere. The bigger pieces that do land from time to time are a bit of an issue. The real nightmare that’s keeping NASA awake at night, however, is the growing amount of space debris, and the potential for it colliding with the space station or an intergalactic private craft taking tourists into outer space.

A US non-profit science policy outfit, the National Research Council called on NASA to develop a formal strategy for tracking space junk, and to look at removing debris.

Read more here

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ISRO developing reusable launch vehicle

A model of Re entry launch vehicle (RLV)

ISRO‘s design of the Reusable Launch Vehicle-Technology Demonstrator (RLV-TD) has been approved by the National Review Committee. An ISRO official said design-related issues have been addressed and presented to the National Review Committee and clearance obtained to go ahead to build the RLV-TD.

The space agency, as a first step towards realizing a Two-Stage To Orbit (TSTO) re-usable launch vehicle, has developed a winged RLV-TD. ISRO, in its recently released annual report, stated that design options have been finalized. Besides, the mission design has been completed with a revised vehicle mass. The RLV-TD will act as a flying test-bed to evaluate various technologies — hypersonic flight, autonomous landing, powered cruise flight and hypersonic flight using air breathing propulsion.

The first in the series of trials is the Hypersonic Flight Experiment (HEX) followed by the landing experiment (LEX), Return Flight Experiment (REX) and Scramjet Propulsion Experiment (SPEX).

During HEX, the vehicle will take lift off in the form of a rocket with a booster. Later, it can be recovered from sea. Though the trials for the first experiment are slated to take place this year, an Isro official said the launch date for carrying out HEX from the Satish Dhawan Space Centre in Sriharikota has not been fixed. The development and flight testing of the Reusable Launch Vehicles-Technology demonstrator missions leading to Two-Stage To Orbit (TSTO) is part of India’s Space Vision 2025 and is expected to bring down cost significantly.

ISRO, in January 2007, conducted the Space capsule Recovery Experiment (SRE-1). Launched by the Polar Satellite Launch Vehicle (PSLV-C7) from Satish Dhawan Space Centre on January 10, 2007, the capsule was successfully recovered on January 22, 2007, from the Bay of Bengal.