To Use Rotate the date ring until the current date is aligned with the current standard time where you are - if you are using daylight savings time, you will need to subtract an hour to return to standard time. The window in the planisphere will show the radio sky that is currently above your horizon, along with some well-known constellations and bright stars. The radio sky at 408 MHz is shown by the colors. Dark colors (green, blue and black) indicate areas where the radio emission is weaker, while brighter colors (yellow and red) show where it is stronger. Visible stars are shown by filled circles, with larger circles showing brighter stars. Open circles indicate ‘fuzzy’ objects such as star clusters and galaxies. Holding the planisphere in front of you, the northern horizon is up, the southern horizon is down, the eastern horizon is left and the western horizon is right. Note that east and west are reversed from maps of the ground – this is because maps of the ground are drawn looking down, while maps of the sky are drawn looking up! Designed by Robert Minchin [email protected]

Cut out desired latitude

No r t hp o l ep r o j e c t i o nf o ru s ewi t hn o r t h e r nh e mi s p h e r ep l a n i s p h e r e Ba s e do n408MHzd a t af r o mHa s l a m,S a l t e r ,S t o f f e la n dWi l s o n , 1982,A&AS ,47,1