[DOC] [TLE] The Magnetosphere - NASA History Homepage [PAR] In order for any solar particle to reach the Earth, it must first pass through the 
Earth's ... the Earth's magnetosphere is blown out by the solar wind into a 
teardrop shape. ... It once was thought that the Earth was surrounded by near-
empty space, ... of magnetic field structures and streams of trapped radiation 
particles around... [DOC] [TLE] Earth's Magnetic Field - Windows to the Universe [PAR] Jun 23, 2010 ... The basic dipole shape of Earth's magnetic field (bottom) and the ... The pressure 
of the solar wind, the stream of charged particles flowing outward from the Sun, 
also distorts the shape of the magnetic field surrounding Earth. [DOC] [TLE] Solar wind - Wikipedia [PAR] The solar wind is a stream of charged particles released from the upper 
atmosphere of the Sun. ... per hour to great distances, filling a region known as 
the heliosphere, an enormous bubble-like volume surrounded by the interstellar 
medium. .... The solar wind is responsible for the overall shape of Earth's 
magnetosphere. [DOC] [TLE] Van Allen radiation belt - Wikipedia [PAR] A radiation belt is a layer of energetic charged particles that is held in place 
around a magnetized planet, such as the Earth, by the planet's magnetic field. [DOC] [TLE] Earth's magnetic field - Wikipedia [PAR] Earth's magnetic field, also known as the geomagnetic field, is the magnetic field 
that extends from the Earth's interior out into space, where it meets the solar wind, 
a stream of charged particles emanating from the Sun. .... There are also two 
concentric tire-shaped regions, called the Van Allen radiation belts, with high-
energy... [DOC] [TLE] Earth's magnetosphere | NOAA / NWS Space Weather Prediction ... [PAR] The magnetosphere is the region of space surrounding Earth where the 
dominant ... This figure illustrates the shape and size of Earth's magnetic field that 
is ... has been compared to the appearance of water flowing around a rock in a 
stream. ... of satellites, and particles and currents from the magnetosphere can 
heat the... [DOC] [TLE] The Solar Wind - HyperPhysics [PAR] It can be thought of as a kind of "evaporation" of particles from the corona. ... the 
earth's magnetic field is dominant over the effects of the solar wind. ... are trapped 
in two large doughnut-shaped rings called the Van Allen radiation belts. ... a 
Geiger counter which detected bands of radiating particles surrounding the earth. [DOC] [TLE] Radiation Belts Shield Earth From High-Energy Particles - Space.com [PAR] Dec 11, 2014 ... Charged particles streaming from the sun cause the belts to grow and ... and the 
shape of Earth's magnetic field, determining that the most likely... [DOC] [TLE] A Magnetic Surprise from Venus - Astrobiology Magazine [PAR] Apr 10, 2012 ... Unlike Venus, Earth has an internal magnetic field which makes its ... interiors, 
such as Earth, Mercury, Jupiter and Saturn, are surrounded by invisible 
magnetospheres. ... particles of the solar wind (electrons and protons) as they 
stream ... of particles around the planet, creating a magnetosphere, shaped... [DOC] [TLE] New Twists in Earth's Radiation Belts  American Scientist [PAR] ... bubble surrounding the planet; the size and shape of the magnetosphere 
change in ... the solar wind, the constant stream of charged particles flowing from 
the Sun. The magnetosphere is crucial to life on Earth; it shields the atmosphere, 
as well ... Those zones of trapped, agitated particles make up the Van Allen belts 
that... [DOC] [TLE] Magnetosphere - New World Encyclopedia [PAR] Sep 5, 2014 ... An artistic rendition of the earth, earth's magnetosphere, and the sun ... The tear 
drop shape of a magnetosphere arises as the magnetized astronomical object 
with its surrounding magnetic field and charged particles passes through ambient 
plasma. ... shields the earth from the solar wind's powerful effects. [DOC] [TLE] The Magnetosphere [PAR] Earth's magnetic field does not stop at the surface but extends far into space. ... of 
space surrounding Earth, called the magnetosphere, is controlled by Earth's 
magnetism. ...

Question: The Earth is surrounded by the magnetosphere, which is shaped by this particle stream
Answer: solar wind