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M51, of 8th magnitude, can be glimpsed under good conditions in binoculars as a misty patch. Small telescopes should show the starlike central nuclei of the Whirlpool and its satellite, but large telescopes are needed to trace its spiral arms. The Whirlpool Galaxy lies about 26 million light years from us. several ‘firsts’ for Mizar. Mizar was also the first double star to be photographed, by George P. Bond at Harvard in 1867; it was the first star discovered to be a spectroscopic binary, by Edward C.

At conjunction (behind the Sun) on April 6 and too close to the Sun for observation throughout the month. April meteors One of the year’s lesser meteor showers, the Lyrids, makes its appearance this month. At best about a dozen meteors are visible each hour, radiating from a point on the border between Lyra and Hercules, near the bright star Vega. Although not numerous, the Lyrids are impressive. A typical Lyrid is bright, fast and leaves a luminous train. Maximum occurs on April 21 or 22 – the exact date varies from year to year – with activity declining rapidly a day or so either side of maximum.

In the north, the Big Dipper (or Plough) stands on its handle. In the south are Antares and the stars of Scorpius, brushing the horizon for observers in high northern latitudes but well displayed for those farther south. Above Antares is the sparse region occupied by the large constellations Ophiuchus and Serpens. Becoming prominent in the eastern sky are Vega, Deneb and Altair, the stars of the Summer Triangle. Eclipses Sun 2011 June 1. Partial solar eclipse, maximum 60%, visible from northern Alaska, northern Canada and north-east Asia.

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