Archive for the ‘Science & Technology’ Category

The History of Hubble

March 20, 2011 Leave a comment

The Hubble Space Telescope was launched by the Space Shuttle Discovery on April 24, 1990. The launch of a space based telescope was one the greatest advances in astronomy in human history, and it would lead to many other space based observatories. Hubble’s mission was to allow humanity to see more, see farther, and see deeper into the past of the universe. Discovery placed the Hubble Space Telescope in an orbit around the Earth at the farthest reaches of the upper atmosphere. The telescope was placed in such a high orbit because it gives astronomers a view of the universe that typically far surpasses that of any ground-based telescopes, due to the fact that the atmosphere distorts and blocks the some of the light that reaches our planet. Hubble is also one of NASA’s most successful and longest-lasting science missions. It has beamed hundreds of thousands of images back to Earth, shedding light on many of the great mysteries of astronomy. Its gaze has helped determine the age of the universe, the identity of quasars, and the existence of black holes.


Do you know where the Hubble Space Telescope is? It could be overhead or located somewhere else in the sky. When displayed in Sky, you can see where Hubble is projected on the background of stars, and it updates as Hubble moves! Is Hubble visible tonight? Have a look. You will need to switch to Sky in Google Earth 4.2 to view this content.

Currently it is now above California…

image –> Click on the link below to track where is Hubble now??


Categories: Science & Technology

Live flight tracking system.

January 11, 2010 Leave a comment


Wow, this is really a cool new technology. The live flight tracking system.

Currently, this is open to public for only 1 city, soon this will be global.     This is not as dynamic as the above one…


Cure Blood Cancer – Imitinef Mercilet

December 13, 2009 Leave a comment


Imitinef Mercilet is the medicine, that cures Blood cancer. And also this is available free of cost @ the below locations

Cancer Institutes at Chennai (Adyar), Trivandrum, Kovai (Ramakrishna Hospital) and Bangalore.

No more deaths due to Blood cancer !!! 🙂


Free Heart Treatment for Kids, at Sri Sathya Sai Institute ,Bangalore.
Treatment for Kidney ailments ,at The Bangalore Kidney Foundation, No.489.39th.Cross,8th.Block, Jayanagar,Bangalore 560 082-India


Artificial rain – (Save drought)

October 11, 2009 Leave a comment


The need to develop and improve rain-making techniques in terms of design, operation, monitoring and evaluation by giving them a more scientific character is today’s need.

This includes using computers to study cloud formations and help the rain-making operations achieve the goals of the project. The role of weather modification, or rain-making, is an important component in water resource management.

The process involved in artificial rain-making involves three easy-to-understand stages. The first stage is agitation. That is using chemicals to stimulate the air mass upwind of the target area to rise and form rain clouds.

The chemicals used during this stage are calcium chloride calcium carbide, calcium oxide, a compound of salt and urea, or a compound of urea and ammonium nitrate. These compounds are capable of absorbing water vapour from the air mass, thus stimulating the condensation process.

The second stage is called building-up stage. Here the cloud mass is built up using chemicals such as kitchen salt, the T.1 formula, urea, ammonium nitrate, dry ice, and occasionally also calcium chloride to increase nuclei which also increase the density of the clouds. In the third stage of bombardment chemicals such as super-cool agents: silver iodide and dry ice are used to reach the most unbalanced status which builds up large beads of water (Nuclei) and makes them fall down as raindrops.

In planning every stage a high degree of expertise and experience is required, in selecting the types and amounts of chemicals to be used, while taking into consideration weather conditions, topographical conditions, wind direction and velocity as well as the location or delimitation of the area for chemical seeding. Several other ideas are also involved in rain making. Rockets containing rain-making chemicals can be fired into the clouds either from the ground or from aircraft.

A jet of rain-making chemicals is shot from a highly pressurised cannister directly into the cloud base, so as to coerce clouds which normally hang above mountain tops to cluster up and rain on the mountain or their slopes.

Rain-making chemicals are added to super-cooled clouds, i.e., those at altitudes above 18,000 metres, to stimulate the formation of ice crystals in the cloud or cloud cluster.

Artificial rain is produced by spraying clouds with substances like Silver Iodide (costly) or cheaper ones like solid carbon dioxide (dry ice) or even finely powdered Sodium Chloride. The process is called seeding.

Often there are clouds, but no rain. This is because of a phenomenon called supercooling. The temperature of the cloud might be close to zero and there might even be crystals of ice in it.

The water vapour in the cloud does not condense to liquid water. The super cooling gets disturbed by spraying the cloud with the chemicals mentioned above, using a small airplane for the purpose.

The `super’ phenomena (cooling, heating, saturation etc.) are perverse in a sense. Very pure water when heated in a clean vessel, often does not start boiling when expected. Crystals of the photographer’s hypo (Sodium thiosulphate) easily dissolve in a little water when heated. But on cooling, crystals do not separate out.

If the vessel is shaken vigorously, or if a small crystal of hypo is freshly added, then crystallization starts immediately.

Making artificial rain is a similar way of intervening in the super cooling phenomenon.

This is the only option, that can save India in the future.


Categories: Science & Technology