[Distance from the Sun] The semi-major axis of Mars' orbit about the sun is 1.52 Astronomical Units (A.U.) or 142 million miles (228 million km). [Distance from Earth] At the 2001 Mars opposition, the planet was approximately 43 million miles (68 million km) from Earth.
Principal Astronomers: J. Bell (Cornell U.), P. James (U. Toledo), M. Wolff (Space Science Institute), A. Lubenow (STScI), J. Neubert (MIT/Cornell)
K. Noll, H. Bond, C. Christian, S. Crawshaw, L. Frattare, F. Hamilton, J. Lee, Z. Levay, T. Royle (Hubble Heritage Team/STScI)
