A lunar halo is caused by the refraction, reflection, and dispersion of light through ice particles suspended within thin, wispy, high altitude cirrus or cirrostratus clouds. As light passes through these hexagon-shaped ice crystals, it is bent at a 22-degree angle, creating a halo 22 degrees in radius (or 44 degrees in diameter). A double halo, sometimes with spokes, may be seen on rare occasions when light reflects off water or ice. This Image was captured near Drumoak Aberdeenshire.
Blood Moon Capture, But Why Red?
Its a puzzle why a totally eclipsed Moon turns red ? The Earth’s atmosphere holds the key. The layer of air surrounding our planet is made up of different gases, water droplets, and dust particles.
When sunlight entering the Earth’s atmosphere strikes the particles that are smaller than the light’s wavelengths, it gets scattered into different directions. Not all colors in the light spectrum, however, are equally scattered. Colors with shorter wavelengths, especially the violet and blue colors, are scattered more strongly, so they are removed from the sunlight before it hits the surface of the Moon during a lunar eclipse. Those with longer wavelengths, like red and orange, pass through the atmosphere. This red-orange light is then bent or refracted around Earth hitting the surface of the Moon and giving it the reddish-orange glow that total lunar eclipses are famous for.
The above Images were captured by Fiona Betteridge from her garden in Drumoak Aberdeenshire using a DLSR Camera
Here is a reminder of our Stargazing Dates at Garlogie for the 2019
ALL DATES ARE FOR A MONDAY NIGHT FROM 7.30 PM
These are Monthly Dates but we will meet when weather permits at other times.
Clear Skies for a new season………Alex
On 9 May there will be a rare transit of Mercury, when the smallest planet in our solar system will pass directly between the Earth and the Sun. The last time this happened was in 2006, and the next two occasions will be in 2019 and 2032. During the transit, which takes place in the afternoon and early evening in the UK, Mercury will appear (in a suitably filtered telescope: see below) as a dark silhouetted disc against the bright surface of the Sun.
From the British Isles, the transit begins at 11:12 GMT (12:12pm BST), when the limb of Mercury appears to touch the limb of the Sun, and ends at 18:42 GMT (7:42pm BST) when the limb of the silhouetted planet appears to leave the Sun. Observers in different locations will see the transit taking place at a slightly different time, as the planet will appear to take a slightly different path across the Sun.
Finding the Owl Cluster in the Night Sky
To find the Owl Cluster start by finding the constellation Cassiopeia,Then identifying the star Ruchbah in the W of Cassiopeia. With Binoculars or a low power eyepiece (25mm) in your telescope’s focuser, trace out a short line to the RIGHT of Ruchbah and the cluster will come into view.This is a real Hoot to find and looks good in any eyepiece give it ago ,Have fun.