Educational materials, articles, facts etc.

Frost Flower and Ice Ribbons

At middle latitudes or high altitudes in autumn conditions arise in which we can observe ribbons ice formations. In late October and early November 2011 immediately above the ground around the stems of some plants appeared icy ribbons.

Fig. 1. Ice ribbons

Iridescent Moon ring

Often we can see an iridescent crown (ring or halo) around the Moon. From time immemorial, this phenomenon is related to the culture of many nations, a harbinger of cold, rain or snow. But often the beauty of nature is short and portends bad weather.

Fig.1. Iridescent crown around the Moon (06 Nov 2011).

The Green Flash Phenomenon

"Ever gazed upon the green flash, Master Gibbs?"
"I reckon I've seen my fair share. Happens on rare occasion; the last glimpse of sunset, a green flash shoots up into the sky. Some go their whole lives without ever seeing it. Some claim to have seen it who ain't. And some say... "
"It signals when a soul comes back to this world, from the dead!

― Hector Barbossa, Joshamee Gibbs and Pintеl to Will Turner. Pirates of the CaribbeanAt Worlds End

Super Moon on March 19, 2011

Perhaps the most famous celestial body in the night sky is the Moon. The moon is our natural satellite of Earth and it plays an important role in the life of our planet. There would hardly have been conditions for the existence of complex forms of life on Earth if the moon had not existed.It is stabilizing the movement of Earth around its axis, which is due to well-known terrestrial seasons. If we were living without our Moon, the Earth would probably be reversed uncontrollably around its solar orbit. This will lead to spontaneous and rapid changes of climates and we would not exist today as a human civilization. Perhaps this is why Mars is not inhabited by humanoids - the moons of Mars cannot stabilize rotation of the planet around its axis. We cannot deny that the world is full of strange and random phenomena. Only very slight modifications of any of them would have turned our notions about the world beyond recognition. If the moon did not exist –   we may would not be on the Earth. If the moon is farther away from its current position, it would never have enjoyed a total solar eclipse. Probably we still would not know of the existence of the solar corona. Moon rotates at the same speed as the speed and rotation around the Earth; from Earth we only see one side of the moon. Figure 1 presents some basic data about the Moon and Earth graphically.


Basic solar parameters and information

The concept of an internationally standardized system of units (astronomical units or astronomical constants) is one of the most fundamental in experimental science. Here you can found some basic parameters and information of the Sun. This information is in accordance by XVIth General Assembly, Grenoble, France, 1976 (pdf) of International Astronomical Union.

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