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LOFAR, the Low Frequency Array, is a large radio telescope consisting about100 soccer field sized antenna stations spread over a region of 400 km indiameter. It will operate in the frequency range from ~10 to 240 MHz, with aresolution at 240 MHz of better than an arcsecond. Its superb sensitivity willallow for a broad range of astrophysical studies. In this contribution we firstdiscuss four major areas of astrophysical research in which LOFAR willundoubtedly make important contributions: reionisation, distant galaxies andAGNs, transient radio sources and cosmic rays. Subsequently, we will discussthe technical concept of the instrument and the status of the LOFAR projectComment: 8 pages, 2 figures, to appear in the proceedings of the XXI Texas  Symposium on Relativistic Astrophysics held on December 9--13 2002, in  Florence, Ital

LOFAR: A NEW RADIO TELESCOPE FOR LOW FREQUENCY RADIO OBSERVATIONS: SCIENCE AND PROJECT STATUS