Saturday, 28 March 2009

Lowitz arcs

Lowitz arcs were first observed by Tobias Lowitz in 1790. Ever since, these arcs have been observed by numerous observers ( 1 ). These particular arcs were photographed on February 19 in Finland.

Friday, 13 March 2009

Halo Meeting 2009

There is less than half a year left until Halo Meeting 2009. The "official" registration form ( 1 ) has been added to our website, and also important information about the costs and the method of payment. Please, read these pages carefully, fill in the form, and keep it in mind that the deadline for both registering and paying the fee is 31 May 2009. You will notice that our homepage has moved to a new address – this is due to regular problems with the previous server ( 2 ).

We are looking forward to hosting this event very much.

Sunday, 1 March 2009

More light on spatial halos

Streetlamp halos with their spatial form can be memorable experiences for the viewer. Yet, we know rather little of them. But now this is changing as Walt Tape has taken a look at several spatial halos in four articles ( 1 ). There are numerous revolutionary insights and a whole new nomenclature is created. And best of all, articles can be read also by mathematically less gifted as there are hardly no equations.