The Halo Vault

Opposite to the lamp I could see something that thus far has appeared for me only in simulations: diffuse arcs extending all the way from...

Here is a collection of images showing an arc that looks like a downwards curving Hastings or Wegener. It's nothing new: the arc was ...

Kimmo Laitinen captured a nice display with Wegener arcs and a really strong lower tangent arc on the 2nd September 2017. I'll let Kim...

The comments in a recent post brought very sharply into focus the problem of halo classification and nomenclature; what do we call a part...

Last mid-December, Rovaniemi was shrouded in fog for five days in a row. With temperatures hovering in -5 to -10 C range, the condition...

closeup of the photo below The year is gearing towards winter, the first glitter in northern Finland expected in less than two months. ...

Now don't get too excited, it's not the news of first exoplanet halo observation. Instead, a space craft has observed halos on E...