Sunday, December 25, 2011
Friday, December 9, 2011
Last Lunar Eclipse of the year
The final lunar eclipse of the year will occur on December 10.
It will be visible from all of Asia and Australia, seen as rising over eastern Europe, and setting over northwest North America. In the Philippines & Malaysia, the lunar eclipse is visible just after sunset.
Dr. Chandana Jayaratne, Senior Lecturer in Physics, University of Colombo said a bright red, soft turquoise, total lunar eclipse is visible to Sri Lanka on Saturday, December 10, full Moon day midnight. This is not only the last eclipse of this year but also the last total lunar eclipse visible to the world until 2014.
The eclipse begins at 5.04 p.m. on 10th evening with the Moon entering into the penumbra of the Earth's shadow (less dark shadow) and ends up at 11.00 p.m. Sri Lanka standard time on Saturday (10) night. The visible part of the eclipse for the observers begins around 6.16 p.m. with the moonrise from the eastern skies when Moon enters into the Umbra - the dark part of the Earth’s shadow and the eclipse will appear till the Moon leaves the Umbra at 9.48 p.m. The total eclipse (i.e. the Moon is fully covered by the dark shadow of the earth) is visible for a period of 51 minutes from 7.36 p.m. till 8.27 p.m. with the greatest eclipse occurring at 8.02 p.m. The entire event is visible from Asia and Australia.
It will be visible from all of Asia and Australia, seen as rising over eastern Europe, and setting over northwest North America. In the Philippines & Malaysia, the lunar eclipse is visible just after sunset.
The eclipse begins at 5.04 p.m. on 10th evening with the Moon entering into the penumbra of the Earth's shadow (less dark shadow) and ends up at 11.00 p.m. Sri Lanka standard time on Saturday (10) night. The visible part of the eclipse for the observers begins around 6.16 p.m. with the moonrise from the eastern skies when Moon enters into the Umbra - the dark part of the Earth’s shadow and the eclipse will appear till the Moon leaves the Umbra at 9.48 p.m. The total eclipse (i.e. the Moon is fully covered by the dark shadow of the earth) is visible for a period of 51 minutes from 7.36 p.m. till 8.27 p.m. with the greatest eclipse occurring at 8.02 p.m. The entire event is visible from Asia and Australia.
Thursday, December 1, 2011
World AIDS Day 2011
WHAT IS AIDS & HIV?
AIDS (Acquired Immune Deficiency Syndrome) is a condition caused by a virus called HIV(Human Immunodeficiency Virus). This virus attacks the immune system, the body's "security force" that fights off infections.
HIV/AIDS... Symptoms.
The time elapsed between exposure to HIV virus and appearance of symptoms is called window period.
Some HIV infected patients remain without symptoms for years together during the window period.
Common symptoms appearing in an AIDS patient are-
• Lengthy inexplicable fatigue, headache, loss of weight.
• Swelling in joints, joint pain.
• Intermittent fever and chills, Cough
• Frequent diarrhoea and occasional constipation
• Excessive sweating especially during night
• Swelling gums and sore throat.
• Generalized itching
• Skin rashes, genital sores
• Anxiety, stress and tension.
• Blurred vision, decreased vision.
• Chest pain, back pain, muscle pain, abdominal pain.
HIV/AIDS... Causes of Infection.
Epidemiological studies have shown that there are only three modes of transmission of HIV infection:-
1) Through sexual intercourse:
2) Through Blood and Blood products : This includes-
• Transfusion of contaminated blood.
• Using contaminated needles and syringes.
• Through contaminated instruments like razors.
3) Vertical transmission: From infected mother to baby.
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