Primary and Secondary Rainbow @Letterkenny

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Noctilucent Clouds (NLC) over Letterkenny - 2017 July 18

Around 12:00 am, few faint filaments of the night shining clouds (Noctilucent clouds / NLC) appeared in the sky towards the direction of setting sun on 2017 July 18. The sun had already an inclination of approximately -12 degrees marking the nautical dusk and astronomical dawn. As the clouds slowly swept towards the darker direction and disappeared in the next 1 and half hours, another band of brilliant white NLCs appeared from the horizon in the direction of the brightest sky (the second half of the video). By this time, the sun was beyond -13 degree inclination clearly marking the astronomical twilight. The time-lapse is created from 1479 individual snaps; the shutter speed is adjusted by a couple of seconds more a few times during this capture sequence to compensate the darkening sky. In the last few 100 clicks, I had to turn the camera a little bit towards the North East to frame the NLCs that appeared in the distant horizon. The big dipper can be seen sweeping towards the right from the top left corner.

Reflections of a Full Moon Rise from Downings Beach

Noctilucent clouds spotted from Letterkenny on 2017 July 01 at 02:15 am

For the first time in my life, I identified the NLC (Noctilucent clounds) at around 02:15 am local time in Letterkenny on 1st July 2017. I drove towards the outskirts of the town to get a better view free from any obstruction from the city lights and got these beautiful pictures. Night clouds or noctilucent clouds are tenuous cloud-like phenomena in the upper atmosphere. They are the highest clouds in Earth's atmosphere, located in the mesosphere at altitudes of around 76 to 85 kilometres. These clouds can be observed only during local summer months and when the Sun is below the horizon for the observer, but while the clouds are still in sunlight. Noctilucent roughly means night shining in Latin.

Noctilucent clouds are not fully understood and are a recently discovered meteorological phenomenon. For example, during my school days these clouds were not even mentioned among the cloud's classifications in the science text books, and I don't think that they made into the curriculum even now. It may be because of the fact that this recent discovery is not well understood and is only visible in the summer months at latitudes between 50° and 70° north and south of the equator. These are becoming increasingly visible, and at times, man made rockets also causes these clouds to appear, and at times due to meteor breaking up in the atmosphere and from it's debris.

You can read more about these clouds in Wikipedia here https://en.wikipedia.org/wiki/Noctilucent_cloud

Good Morning Letterkenny

Good Morning Letterkenny

Dunlewey Lough

Dunlewey Lough

Sunset on a Foggy Winter Day in HDR

Sunset on a Foggy Winter Day in HDR

On a Foggy Morning in Letterkenny

On a foggy morning in Letterkenny, during the winter; when the sky was clear and the temperature stayed near zero degree throughout the day; the shadows  shed by the trees on the low lying foggy layer and the distant fog layers hid the town of Letterkenny and made me feel as if I am looking down into a deep a valley of thick forest covered in clouds and fog

Sunset Tree

Sunset Tree

Small Is Beautiful

Small Is Beautiful

Moon Rays (Crepuscular) Over Letterkenny on a Full Moon Day

Moon can also cast rays (crepuscular rays) and is easily visible when it is on a full moon day. On 10th May 2017 (Full Moon), the low lying clouds created beautiful Moon Rays over Letterkenny

A Pleasant Sunrise in Letterkenny

A Pleasant Sunrise in Letterkenny

Sunset over Derryveagh mountain range between Mt. Errigal and Muckish

Today's (2017 May 03) sunset was fantastic, the entire day had a clear sky and towards the evening a thin layer of cloud appeared here and there and it made the sunset beautiful which happened at 09:10 pm local time. These two clicks are captured from Mountaintop, Letterkenny, the Mountian peak on the far left side is Mt. Errigal and the flat Mountain on the right is Muckish. The mountain range that includes these two favorite and easy trekking destinations - Derryveagh Mountain range is seen across the frame bottom

This second shot was particularly interesting to me as the contrail of the flight seen emerging from the top right corner has got it's own shadow on it. The bright parts of the contrail appeared to be reddish in the setting sun's light where the majority of shorter wavelengths are already scattered. The contrail appeared brighter in the top part but then towards the bottom, it appeared to be dark on behalf of it's own shadow as if it was smoke coming out of the jets.

Good Morning Letterkenny

Sunrise on 2017 May 02 @ Letterkenny