Comet Hale-Bopp (1995 O1) has been intensely monitored with the 82cm IAC-80 Telescope at Teide Observatory, Tenerife, Spain. Multicolour photometry taken on various nights in mid-August 1995 shows that the inner coma was redder than solar colours, with a power law spectrum of index ~ -3.5, consistent with dust scattering. A large change in the

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We propose a combination of two dynamos for solar and stellar magnetic activity. A strong-field dynamo operating in the overshoot layer at the base of the convection zone generating superequipartition fields concentrated in isolated flux tubes is responsible for cyclic activity (e.g., sunspots), while a turbulent weak-field dynamo in the convection

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