In 1995, scientists pointed the Hubble Telescope at an area of the sky near the Big Dipper. The location was apparently empty, and the whole endeavour was risky – what, if anything, was going to show up? But what came back was nothing short of spectacular: an image of over 1,500 galaxies glimmering in a tiny sliver of the universe. Alex Hofeldt (with animation by Bliink) helps us understand the scale of this image. Even after you have watched this extract from Hofeldt’s Ted-Ed lecture it is unlikely that your head will stop spinning with the enormity of the universe.
Ice caverns are short-term components that appear at the advantage of snow. They look incredibly wonderful from the within. This particular cave is on the freezing lagoon of the Svínafellsjökull glacier in Skaftafell, Iceland. The hundreds of years old ice arriving down the runs of Öræfajökull via Svínafellsjökull glacier has metamorphosed into extremely condensed glacier ice that contains almost no air pockets. The deficiency of air indicates that it takes up almost all noticeable mild, apart from the azure portion which is then noticeable to the undressed eye. However, this azure ice can be seen only under certain conditions. It can be seen during the freezing months months season after lengthy stretches of rainfall when the top area part of the glacier has been cleaned away. It can be seen in ice-caves like this one and on sailing icebergs that have lately combined over.
