What is Lunar Eclipse ?

A lunar eclipse occurs when the Moon passes directly behind the Earth into its umbra (shadow).

A lunar eclipse can occur only the night of a full moon. A total lunar eclipse has the direct sunlight completely blocked by the earth's shadow. The only light seen is refracted through the earth's shadow. This light looks red for the same reason that the sunset looks red, due to rayleigh scattering of the more blue light.

Because of its reddish color, a total lunar eclipse is sometimes called a Blood Moon.

Unlike a solar eclipse, which can be viewed only from a certain relatively small area of the world, a lunar eclipse may be viewed from anywhere on the night side of the Earth. A lunar eclipse lasts for a few hours, whereas a total solar eclipse lasts for only a few minutes at any given place, due to the smaller size of the Moon's shadow. Also unlike solar eclipses, lunar eclipses are safe to view without any eye protection or special precautions, as they are dimmer than the full moon.

YouTube Link - https://www.youtube.com/watch?v=49O2MsT1txU

Credits - https://en.wikipedia.org/wiki/Lunar_eclipse

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What is a Harvest Moon ?

The Harvest Moon is the full Moon nearest the start of fall or the autumnal equinox. This usually means it coincides with the September full Moon, though it can also fall nearer to the October full Moon, occurring anywhere from two weeks before to two weeks after the equinox. In 2017 , the Harvest Moon will rise on October 5 at 2:40 P.M. EDT. WHY IS IT CALLED THE HARVEST MOON? For several evenings, the moon rise comes soon after sunset. This results in an abundance of bright moonlight early in the evening , which was a traditional aide to farmers and crews harvesting their summer-grown crops. Hence, it’s called the “Harvest” Moon! CREDITS - 1) https://www.almanac.com/content/what-harvest-moon 2) http://news.nationalgeographic.com/2017/10/when-is-harvest-moon-october-space-science/ YOUTUBE LINK - https://www.youtube.com/watch?v=tJT...

What is Reflection of Light ?

Reflection is a very common word and is related to the fields of physics and mathematics. The basic meaning of a reflection is ‘Something Returned in Response’ . Even in our conversation we use this term at times, to mean a some one’s reaction. In optics, it relates to an image of an object. Light rays are basically wave motions and they are capable of being reflected by an interface in between two mediums. Such interfaces are called Light Reflectors . The most common Light reflector is the one we use many times a day, which is nothing but a plane mirror. But it is not only a plane mirror reflects light. Even a curved mirror does that though the nature of reflection of light by curved mirrors is different. YouTube Link - https://www.youtube.com/watch?v=9PRRUgoTSro Credits - http://physics.tutorvista.com/light/reflection.html

What is a Blue Moon ?

A "Blue Moon" is a fairly infrequent phenomenon involving the appearance of an additional full moon within a given period. But which period — there are two definitions of the term, and one was borne out of a misunderstanding of the other. The older meaning defines a Blue Moon as the third full moon in a season that has four full moons. Called a seasonal Blue Moon, this occurs about every 2.7 years. Why the third moon? Seasons normally have three full moons, and some of them, for traditional and religious reasons, must occur at specific times of the year. The other meaning is that a Blue Moon is the second full moon within a single calendar month. This definition — a monthly Blue Moon — has gained popularity in recent years because of a misinterpretation of an almanac's original definition. Blue Moons are not typically blue in color — that happens only, well, once in a Blue Moon , but there is the possibility for a hint of blue in any full moon. YouTube Li...

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