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A star is a massive, luminous ball of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth. Other stars are visible from Earth during the night when they are not outshone by the Sun or blocked by atmospheric phenomena. Historically, the most prominent stars on the celestial sphere were grouped together into constellations and asterisms, and the brightest stars gained proper names. Extensive catalogues of stars have been assembled by astronomers, which provide standardized star designations.
For at least a portion of its life, a star shines due to thermonuclear fusion of hydrogen in its core releasing energy that traverses the star's interior and then radiates into outer space. Almost all naturally occurring elements heavier than helium were created by stars, either via stellar nucleosynthesis during their lifetimes or by supernova nucleosynthesis when stars explode. Astronomers can determine the mass, age, chemical composition and many other properties of a star by
کوچک باش و عاشق ! معشوق خودت را بزرگ انتخاب کن... بزرگ...!
که عشق می داند آئین بزرگ کردنت را ...
منبع:گروه موفقیت
Drinking vitamin D-fortified beverages like milk helps increase calcium absorption. That's especially important for those at risk of osteoporosis or thinning bones. Vitamin D may also help reduce the risk of colon, breast, and prostate cancers. Eat yogurt with live cultures to aid digestion.
Keeping off extra weight puts less pressure on your joints, less strain on your heart, and can reduce your risk of certain cancers. It gets tougher to do as metabolism slows and as you lose muscle with age. Select proteins like lean meats, tuna, or beans. Include vegetables, whole grains, and fruits. It takes more energy for your body to break down complex carbs, and the added fiber will help you feel fuller.
http://www.webmd.com/healthy-aging/nutrition-world-2/slideshow-nutrition-longevity
Heart of Darkness tells the story of Marlow, a sailor, who describes to his shipmates the unusual experience he had traveling upriver in the Congo and the effect it had upon him. Hired by a Continental trading company as a steamboat captain between the outer stations and the interior, Marlow's primary mission was to visit and, if necessary, retrieve the mysterious Kurtz, an extraordinarily successful agent who had lost contact and reportedly fallen ill. Marlow tells the men that the entire journey was a sort of dream--lacking any real-world logic, deeply affecting, and difficult to describe in its details. The trip took several months, occurring in stages--a trip along the coast, an overland trek to the Central Station, and finally the riverboat journey to Kurtz's outpost.
During the entire expedition Marlow was struck by the mistreatment of natives by the Company and its agents, the preponderance of disease, the intimidating presence of the jungle, and the absurdness of the colonial operation carrying on for a relatively small amount of ivory. He began hearing of Kurtz as soon as he
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