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• Basis vector
  ...the vector space can be described as a linear combinination of the basis vectors. For instance any [[position vector]] in a three-dimensional coordinate sys There are 3 equivalent three-dimensional systems of basis vectors, popular for use in the physical sciences:
  2 KB (250 words) - 04:02, 21 January 2009
• Magnetic fields of Mars
  ...ces. But the fields were found to be very weak in two large and old impact basis, Hellas and Argyre. Each basin, carved out by a colossal space asteroid, is ...ertain areas of Mars might appear magnetically featureless if the magnetic vectors of their source rocks vary in direction over distances of a few kilometers
  2 KB (270 words) - 04:02, 21 January 2009
• Orbital Intersections
  Let the [[basis vectors]] b1 and b2 as defined above form the [[coordinate system]] of the plane s note the norm of (b-f) is the distance between the position vectors b and f is given by:
  2 KB (270 words) - 04:02, 21 January 2009
• Orbital plane
  One way to solve this equation is to note that the [[cross product]] of two vectors gives a vector that is [[perpendicular]] to both. ...tions into the new [[coordinate system]] it is desirable to make the basis vectors orthogonal and perpendicular. Thus choose:
  3 KB (431 words) - 04:02, 21 January 2009