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  • When the gas reaches about 10 million K (18 million °F), hydrogen nuclei begin to fuse into helium nuclei, and the star is born. Energy from nuclear fusion radiates outward from the center of the burgeoning star, and gradually halts the gas cloud’s collapse.
    When the gas reaches about 10 million K (18 million °F), hydrogen nuclei begin to fuse into helium nuclei, and the star is born. Energy from nuclear fusion radiates outward from the center of the burgeoning star, and gradually halts the gas cloud’s collapse.
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  • Where do stars come from?

    According to current star formation theory, stars are born as clumps within gigantic gas clouds that collapse in on themselves. The cloud’s material heats up as it falls inward under the force of its own gravity.
    Where do stars come from? According to current star formation theory, stars are born as clumps within gigantic gas clouds that collapse in on themselves. The cloud’s material heats up as it falls inward under the force of its own gravity.
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  • A star is a luminous ball of gas, mostly hydrogen and helium, held together by its own gravity. Nuclear fusion reactions in its core support the star against gravity and produce photons and heat, as well as small amounts of heavier elements. The Sun is the closest star to Earth.
    A star is a luminous ball of gas, mostly hydrogen and helium, held together by its own gravity. Nuclear fusion reactions in its core support the star against gravity and produce photons and heat, as well as small amounts of heavier elements. The Sun is the closest star to Earth.
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  • WHAT IS STAR ?

    We're all pretty familiar with stars. We see them on most clear nights as tiny, twinkling pinpricks of light in the sky. Stars are the topic of countless poems, stories, and nursery rhymes alike. But just what is a star, exactly?
    WHAT IS STAR ? We're all pretty familiar with stars. We see them on most clear nights as tiny, twinkling pinpricks of light in the sky. Stars are the topic of countless poems, stories, and nursery rhymes alike. But just what is a star, exactly?
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  • good evening e-sathi users
    good evening e-sathi users
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  • good evening friends
    good evening friends
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  • When windows won't open and salt clogs the shaker/Weather will favor the umbrella maker is another weather-predicting rhyme. When the air is humid, or full of water vapor, wood swells. It absorbs the water in the air. Salt also absorbs water in the surrounding air, forming large lumps. Wood-framed windows and salt in shakers become difficult to use. As the humid air reaches its saturation point, rain (and umbrellas) are likely to be seen.
    When windows won't open and salt clogs the shaker/Weather will favor the umbrella maker is another weather-predicting rhyme. When the air is humid, or full of water vapor, wood swells. It absorbs the water in the air. Salt also absorbs water in the surrounding air, forming large lumps. Wood-framed windows and salt in shakers become difficult to use. As the humid air reaches its saturation point, rain (and umbrellas) are likely to be seen.
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  • Red sky in morning, sailors take warning/Red sky at night, sailors delight is a popular rhyme that attempts to predict the weather. In fact, its pretty accurate. Weather patterns usually move from west to east. Red sky in the morning (in the east, where the sun rises) indicates that the sun is reflecting off rainclouds, meaning the day will likely have rain (difficult weather for sailing.) Red sky at night (in the west, where the sun sets) indicates clear, calm weather (perfect weather for sailing).
    Red sky in morning, sailors take warning/Red sky at night, sailors delight is a popular rhyme that attempts to predict the weather. In fact, its pretty accurate. Weather patterns usually move from west to east. Red sky in the morning (in the east, where the sun rises) indicates that the sun is reflecting off rainclouds, meaning the day will likely have rain (difficult weather for sailing.) Red sky at night (in the west, where the sun sets) indicates clear, calm weather (perfect weather for sailing).
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  • Red Sky in Morning . . .
    Before meteorologists were able to accurately predict weather, people noticed different characteristics associated with different weather patterns. They used these characteristics to predict the weather.
    Red Sky in Morning . . . Before meteorologists were able to accurately predict weather, people noticed different characteristics associated with different weather patterns. They used these characteristics to predict the weather.
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  • To make your own thunder, you will need a paper lunch bag. **** into the bag until it's filled with air. Quickly twist the top closed with one hand, and with the other hand, hit the bag. When you hit the bag, the air pressure increases very quickly. In fact, the air pressure breaks the bag. The air rushes outside the bag, creating a sound wave. When it reaches your ear, you hear a loud boom.
    To make your own thunder, you will need a paper lunch bag. Blow into the bag until it's filled with air. Quickly twist the top closed with one hand, and with the other hand, hit the bag. When you hit the bag, the air pressure increases very quickly. In fact, the air pressure breaks the bag. The air rushes outside the bag, creating a sound wave. When it reaches your ear, you hear a loud boom.
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  • Make Some Noise—Thunder
    Do you know what makes the noise you hear with thunder? Lightning. Lightning is very, very hot because it has so much energy. When lightning strikes, the molecules in the air expand very rapidly. The heated air creates a huge sound wave, which is thunder.
    Make Some Noise—Thunder Do you know what makes the noise you hear with thunder? Lightning. Lightning is very, very hot because it has so much energy. When lightning strikes, the molecules in the air expand very rapidly. The heated air creates a huge sound wave, which is thunder.
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  • Responding to such needs, meteorologists are working to develop new tools and new methods that will improve their ability to forecast the weather.
    Responding to such needs, meteorologists are working to develop new tools and new methods that will improve their ability to forecast the weather.
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  • Small businesses, too, would benefit from a better forecast. An ice cream store owner, for example, could save her advertising funds for some time in the future if she knew the coming weekend was going to be cool and rainy.
    Small businesses, too, would benefit from a better forecast. An ice cream store owner, for example, could save her advertising funds for some time in the future if she knew the coming weekend was going to be cool and rainy.
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  • Power companies would also benefit from accurate forecasts. They adjust their systems when they expect extreme temperatures, because people will use their furnaces and air conditioning more on these days. If the forecast predicts a hot, humid day and it turns out to be mild, the power company loses money. The extra electricity or gas it bought doesn’t get used.
    Power companies would also benefit from accurate forecasts. They adjust their systems when they expect extreme temperatures, because people will use their furnaces and air conditioning more on these days. If the forecast predicts a hot, humid day and it turns out to be mild, the power company loses money. The extra electricity or gas it bought doesn’t get used.
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  • Outdoor activities, such as concerts or sporting events, could be planned with greater accuracy. Sports teams and musicians would not have to reschedule, and fans would not be inconvenienced.
    Outdoor activities, such as concerts or sporting events, could be planned with greater accuracy. Sports teams and musicians would not have to reschedule, and fans would not be inconvenienced.
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  • Imperfect weather forecasts cause construction companies to lose both time and money. A construction foreman might call his crew in to work only to have it rain, when the crew can’t work. An unexpected cold spell could ruin a freshly poured concrete foundation.
    Imperfect weather forecasts cause construction companies to lose both time and money. A construction foreman might call his crew in to work only to have it rain, when the crew can’t work. An unexpected cold spell could ruin a freshly poured concrete foundation.
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  • Better frost predictions, for example, could save U.S. citrus growers millions of dollars each year. Citrus fruits such as oranges are very vulnerable to frost—they die in cold, wet weather. With more accurate frost forecasts, citrus farmers could plant when they know the new, tender seedlings wouldn’t be killed by frost. More accurate rain forecasts would enable farmers to plan timely irrigation schedules and avoid floods.
    Better frost predictions, for example, could save U.S. citrus growers millions of dollars each year. Citrus fruits such as oranges are very vulnerable to frost—they die in cold, wet weather. With more accurate frost forecasts, citrus farmers could plant when they know the new, tender seedlings wouldn’t be killed by frost. More accurate rain forecasts would enable farmers to plan timely irrigation schedules and avoid floods.
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  • More Accurate Forecasts

    Although weather forecasts have become more reliable, there is still a need for greater accuracy. Better forecasts could save industries across the world many billions of dollars each year. Farmers and engineers, in particular, would benefit.
    More Accurate Forecasts Although weather forecasts have become more reliable, there is still a need for greater accuracy. Better forecasts could save industries across the world many billions of dollars each year. Farmers and engineers, in particular, would benefit.
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  • In addition, you will probably see weather maps showing high- and low-pressure systems and fronts. In addition to bars representing different fronts, weather maps usually show isotherms and isobars. Isotherms are lines connecting areas of the same temperature, and isobars connect regions of the same atmospheric pressure. Weather maps also include information about cloudiness, precipitation, and wind speed and direction.
    In addition, you will probably see weather maps showing high- and low-pressure systems and fronts. In addition to bars representing different fronts, weather maps usually show isotherms and isobars. Isotherms are lines connecting areas of the same temperature, and isobars connect regions of the same atmospheric pressure. Weather maps also include information about cloudiness, precipitation, and wind speed and direction.
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