04 novembro 2017

A Year of Full Moons


Do all full moons look the same? No. To see the slight differences, consider this grid of twelve full moons. From upper left to lower right, the images represent every lunation from 2016 November through 2017 October, as imaged from Pakistan. The consecutive full moons are all shown at the same scale, so unlike the famous Moon Illusion, the change in apparent size seen here is real. The change is caused by the variation in lunar distance due to the Moon's significantly non-circular orbit. The dark notch at the bottom of the full moon of 2017 August is the shadow of the Earth -- making this a partial lunar eclipse. Besides the sometimes exaggerated coloring, a subtler change in appearance can also be noticed on close examination, as the Moon seems to wobble slightly from one full moon to the next. This effect, known as libration, is more dramatic and easier to see in this lunation video highlighting all of the ways that the Moon appears to change over a month (moon-th).

from NASA http://ift.tt/2lPBaHp
via IFTTT
Read More

Although Ryōan-ji, in Japan, has temples built as far back as...



Although Ryōan-ji, in Japan, has temples built as far back as the 1000s CE, the garden at Ryōan-ji was thought to have been built between 1450 and 1473. Which makes this rectangle of land one of the oldest gardens in the world. A World Heritage site, the garden at Ryōan-ji is considered to be one of the defining surviving examples of a form of Japanese Zen temple garden design called kare-sansui or ‘dry landscape’.

Read More

The bow and arrow, scientists believe, were invented in the...



The bow and arrow, scientists believe, were invented in the middle of the Stone Age – so about 60,000 years ago. The first arrows were probably fire-dipped sharpened sticks. Later they became more sophisticated to inflict more damage, with animal bone heads and flint-tipped points. Prehistoric flint points, like these, have been found dating as far back as 16,000 years ago!

Read More

VISIT –> http://ift.tt/1eWNk1f for quality...



VISIT –> http://ift.tt/1eWNk1f for quality psychology information and resources.

Read More