The state of space in the Solar System (the solar wind, Earth's magnetosphereâ€¦etc) at a given time and place, with respect to variables such as plasma density and temperature, and magnetic field strength and direction.
Space weather is a new field of science that studies the interactions between the Sun and the Earth. It attempts to predict solar flares, coronal mass ejections, geomagnetic storms and other space phenomena.
The conditions and processes occuring in space which have the potential to affect the near Earth environment. Space Weather processes can include changes in the interplanetary magnetic field, coronal mass ejections from the sun, and disturbances in the Earth's magnetic field. The effects can range from damage to satellites to disruption of power grids on Earth. See also: Space Weather.
Space Weather refers to conditions on the Sun and in the solar wind, and the Earth's magnetosphere, ionosphere, and thermosphere that can influence space and ground-based technological systems and can endanger human life or health. Adverse conditions in the space environment can cause disruption of satellite operations, communications, navigation, and electric power distribution grids, leading to a variety of socioeconomic losses. This composite image presents the three most visible elements of space weather: a storm from the Sun, aurora as seen from space, and aurora as seen from the Earth. The solar storm is a corona mass ejection (composite from SOHO). The middle image from Polar's VIS imager. Lastly, Jan Curtis took this image of an aurora display in Alaska.
(Modern designation for cosmical meteorology.) Designation for the study of those phenomena that lie wholly or in part outside the earth's atmosphere. The term is analogous to terrestrial meteorology in that it includes the study of planetary atmospheres and solarâ€“weather relationships.
Space weather is the concept of changing environmental conditions in outer space. It is distinct from the concept of weather within an atmosphere, and generally deals with the interactions of ambient radiation and matter within interplanetary, and occasionally interstellar space. From the definition of the National Academy of Science: "Space weather describes the conditions in space that affect Earth and its technological systems.