It is a typical lament of the astronomers of today that there has been a dearth of bright comets in the 20th century and, particularly in its latter half. Many go on to point out the large number of very bright comets that were observed in the 18th and 19th century to reinforce the unfavourable comparison with modern times. Analysis of bright naked

During 1992-93 the infrared flux from the Wolf-Rayet star WR 125, which formed a dust shell in 1990-91, reached a maximum. This is attributed to the continuous formation of dust in its wind until early 1993. Spectroscopy of the dust cloud in the 10-μm region showed that the expected WR emission lines were completely veiled by featureless emission

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We obtain the form of the gravitational waves emitted by eccentric binary systems, including general relativistic periastron advance effects. Using the method of stationary phase, we find the Fourier transform of the amplitude. The Fourier analysis is based on an approximation of the waveform consisting of a linear superposition of five harmonics

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We present astrometric, photometric and spectroscopic observations of supernova 1993J in M8 1, obtained with the Isaac Newton Group telescopes and the Carlsberg Automatic Meridian Circle. The spectral data set includes the first spectrum ever taken of SN1993J. The early spectra also yield an estimate of the total visual extinction, Aν. This is