Natural world

Professor David Wilkinson speaks on scoence and religion at Lichfield Cathedral 24/9/2019

Professor David wilkimson from Durham University is worth listening to. A talented scientist and a committed Christian, his talk tonight was enjoyable and inciteful. Whether you believe in God or not, this talk was worth attending and if you ever get the chance to hear him speak then I would recommend you take it!

It was quite funny too!

Andy

Alexander’s dark band

Now here is a name for an effect that I have observed and been puzzled about!

Alexander’s dark band – – Alexander of Aphrodisias first described the effect with double rainbows in 200 AD and it now carries his name.
Light rays undergoing a single reflection in raindrops form the primary rainbow or brighten the sky inside it. Rays reflected twice are deviated to form the secondary bow or brighten the sky outside.

Raindrops along lines of sight between the two bows cannot send light to your eye and so the sky is darker there.

You can see the effect in this image I posted a year or so ago.

 

Read more at https://www.atoptics.co.uk/rainbows/adband.htm or https://en.wikipedia.org/wiki/Alexander%27s_band

Solargraphs – Summer>Winter Solstice 2018

All from Baked Bean cans within a 10 mile radius, using Ilford Multigrade B&W paper. Scanned and played with in Photoshop.

Andy’s first one, slightly different angle to his usual version.

And his second – massive amounts of water damage (was still a few mm of rain in the bottom of the can), but love the effect it’s created. This is his usual angle (so can be compared to previous attempts). Can just make out the house bottom right of centre and the tree to the left.

Mine, screwed to the house, SSE facing.

Sister’s from her new home. Was surprised at the very upper sun trace, but it can be matched to my own above. Thought at first it must have moved or have been a reflection from the inside top of the can. The cans are painted black inside and any movement would have created a double image of the houses – there isn’t anything to suggest that.

One I made up for a lady at my new workplace.

Damian

(Another!), Moon and Venus from Tuesday 4th Dec

My works Nikon D7000DX (APS-C) and my own (full frame) Nikon AF-S 24-70mm f/2.8G ED, hand-held out the bedroom window.

 

Jpegs straight off the camera.

 

7.09am ISO125 1/20 f/2.8 84mm (Focal length in 35mm)

 

7.34am ISO100 1/50 f/3.2 82mm (Focal length in 35mm)

 

7.35am ISO100 1/60 f/3.5 70mm (Focal length in 35mm)

 

7.35am ISO100 1/60 f/3.5 82mm (Focal length in 35mm)

Damian

Scottish atmospherics

Nothing much astronomical on our recent trip around around the North Coast 500 in Scotland.  (https://www.visitscotland.com/see-do/tours/driving-road-trips/north-coast-500/) Fantastic, by the way. Totally lives up to its billing as “Scotland’s stunning answer to Route 66 – – – named one of the top coastal road trips in the world”)

However, lots of nice atmospherics – rainbows and crepescular rays. Here are a few of them.

The last one I couldn’t resist posting – Salmon leaping to get a better view of the sky at the Falls of Shin!

Lightning!

Just had a hefty thunder storm over the hills from Westendorf, Austria.

I quickly downloaded the iLightningCam app that Ed mentioned (well the free version to trial)!

This was the result from having a play with the settings sitting on the balcony from our room (hand held no less)…

Damian