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In other words, the farther from the tropics one lies, the lower the sun angle is, which causes those locations to be cooler due the spread of the sunlight over a greater surface.[6] The strong temperature contrast between polar and tropical air gives rise to the large scale atmospheric circulation cells and the jet stream.[7] Weather systems in the mid-latitudes, such as extratropical cyclones, are caused by instabilities of the jet stream flow (see baroclinity).  Weather refers to day-to-day temperature and precipitation activity, whereas climate is the term for the averaging of atmospheric conditions over longer periods of time.[4] When used without qualification, "weather" is generally understood to mean the weather of Earth.  The Earth's weather system is a chaotic system; as a result, small changes to one part of the system can grow to have large effects on the system as a whole.  On Earth, the common weather phenomena include wind, cloud, rain, snow, fog and dust storms.  Weather does occur in the stratosphere and can affect weather lower down in the troposphere, but the exact mechanisms are poorly understood.  Weather is driven by air pressure, temperature and moisture differences between one place and another.  Weather occurs primarily due to air pressure, temperature and moisture differences between one place to another.  Almost all familiar weather phenomena occur in the troposphere (the lower part of the atmosphere).  Studying how the weather works on other planets has been helpful in understanding how weather works on Earth.  Most weather phenomena occur in the lowest level of the atmosphere, the troposphere, just below the stratosphere.  Weather systems in the mid-latitudes, such as extratropical cyclones, are caused by instabilities of the jet stream flow.  The strong temperature contrast between polar and tropical air gives rise to the largest scale atmospheric circulations: the Hadley Cell, the Ferrel Cell, the Polar Cell, and the jet stream.  Higher altitudes are cooler than lower altitudes, as most atmospheric heating is due to contact with the Earth's surface while radiative losses to space are mostly constant.  Weather forecasting is the application of science and technology to predict the state of the atmosphere for a future time and a given location.  Over thousands of years, changes in Earth's orbit can affect the amount and distribution of solar energy received by the Earth, thus influencing long-term climate and global climate change.  Human attempts to control the weather have occurred throughout history, and there is evidence that human activities such as agriculture and industry have modified weather patterns.  These differences can occur due to the sun angle at any particular spot, which varies by latitude from the tropics.  A famous landmark in the Solar System, Jupiter's Great Red Spot, is an anticyclonic storm known to have existed for at least 300 years.  These differences can occur due to the sun's angle at any particular spot, which varies with latitude.  However, weather is not limited to planetary bodies.  Surface temperature differences in turn cause pressure differences.  A star's corona is constantly being lost to space, creating what is essentially a very thin atmosphere throughout the Solar System.  Because the Earth's axis is tilted relative to its orbital plane, sunlight is incident at different angles at different times of the year.  On Earth's surface, temperatures usually range ±40 °C (−40 °F to 100 °F) annually.  Less common events include natural disasters such as tornadoes, hurricanes, typhoons and ice storms.  The movement of mass ejected from the Sun is known as the solar wind.