Astronomical Notes for May. Venus is an evening star, but too near the sun for convenient observation. Mars and Jupiter are approaching each other in Leo, but do not reach conjunction until June 4. Mars is 47′ north of Neptune at 8 p.m. on May 16; this may aid observers without circles in identifying Neptune. Saturn, in the eastern part of Capricornus, may be seen after midnight; it is still too far south for con venient observation in England.