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After completing your 12th, you will be eligible for doing a diploma course in air hostess training.
After joining, you have to learn the following things under the training academy.
1.First Aid Training,
2.Grooming,
3.Spoken English,
4.Business English,
5.Airport and In-flight Practical Orientation,
6.Practical Training on Fidelio and Galelio,
7.Swimming.
Some other criteria to become an air hostess:
Age: Age should below 25 years of age
Height: at least 154.5-157.5 cms tall.
(Weight and height should be proportionate with good eyesight of 6/6 uncorrected vision in both eyes.)
So if you fulfil the above criteria, then you are eligible to become an air hostess.
A fresher may earn anywhere between 16,000 and 30,000 Rupees.

The Science of the origin and development of the universe. Modern cosmology is dominated by the Big Bang theory, which brings together observational astronomy and particle physics is known as cosmology.
There is a great scope for the qualified cosmologist in various public and private organizations like ISRO the Vikram Sarabhai Space Centre (VSSC), Space Physics Laboratories, Space Applications Centres, etc. One can also join non-profit organisations like the Association of Bangalore Amateur Astronomers (ABAA) etc.
A beginner in the field of cosmology may be inducted as a researcher into an existing team which would be already working on a project. There they can sharpen their skills under the close supervision of senior scientists. The Ph.D. holders may teach at the college or university level.
Professionals in this field may work for commercial/non-commercial research, development and testing laboratories, observatories, planetarium, Science Park etc. Degree/Diploma/Doctorate holders in these disciplines can have opportunities in major establishments like the Indian Space Research Organisation (ISRO), the Vikram Sarabhai Space Centre (VSSC), Space Physics Laboratories, Space Applications Centres, etc. One can also join non-profit organizations like the Association of Bangalore Amateur Astronomers (ABAA) which is involved in telescope making, organizing observation sessions for the public and popularization of Astronomy.