El otoño astronómico, ¿cuándo empieza? 
El equinoccio de otoño es cuando comenzará el otoño según el calendario astronómico. Es en este día que las partes clara y oscura del día se igualarán, y a partir de esta fecha las horas de luz comenzarán a disminuirse.
Entonces, ¿cuándo?

El equinoccio de otoño toca a 22 de septiembre.
El período entre el equinoccio de otoño y el de primavera, en septiembre y marzo, se denomina como año tropical. Es a este período al que se refiere la ciencia para medir el tiempo y tiene aproximadamente 365,2422 días solares.


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Otoño astronómico

Did you know that apart from the usual rainbow, there is also a lunar one?

Lunar (or night) rainbows are really rare. The reason is an exact combination of obligatory factors that must coincide in order for a lunar rainbow to appear in the night sky.

So, what are these factors?

- Moon phase, close to full moon
- Dark cloudless sky
- Low height of the Moon above the Earth
- High humidity
- Rain opposite the Moon

It is when all these moments coincide at the same time, there is a chance to see one of the rarest atmospheric phenomena: the lunar rainbow.


Most often lunar rainbows happen next to large waterfalls. Lunar rainbows were recorded, for example, near waterfalls in the USA and Canada, on the border of Zambia and Zimbabwe, in the Caucasus, Yamal and in the foothills of Kazakhstan.


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Lunar Rainbow

What is a mirage and where does it come from?

Mirage is undoubtedly one of the most mysterious atmospheric phenomena that has always been associated with secrets and legends. But in reality, the mirage is easily explained from a scientific point of view.

Mirage appears when the air near a highly heated surface (about 60-70 °C) also heats up and becomes inhomogeneous. The optical density of the air changes drastically, and the light rays become curved. This is how fantastic images appear at the horizon.


There are several types of mirages,he most unusual of them is Fata Morgana (from the Italian fata Morgana - the fairy Morgana who lived on the seabed and lured travelers with the help of mirages). 


Fata Morgana happens when the rays of light are refracted in both the upper and lower layers of the air, and a double mirage appears with fantastic pictures.


Have you ever seen mirages?
Want to learn more? 
Here is a link for you https://weather-aware.com/posts/what-is-mirage/


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What is Mirage?

This year the heat is breaking records in both temperature and duration. Thus we decided to find out where the hottest point of our planet is.

It turned out to be the Deshte-Lut desert in the Middle East. This

sandy-saline desert is located in Iran ( https://en.wikipedia.org/wiki/Dasht-e_Lut ), its length is about 550 km, and its width is from 100 to 200 km.

Deshte Lut is officially recognized as the hottest place on Earth. It was here that a record temperature of +159,8 °F (70.5 °C) was recorded several years ago!

Despite such indicators, the Shur river flows through the desert and does not dry up even in the hottest years.


This desert also owns another natural world attraction: one of the tallest dunes in the world, its height is 407 meters.


Hottest Place on Earth

Do you feel that this forecast was right? 