Black Hole

geometrymatters:

Harmonograph, H. Irwine Whitty, 1893

“The facts that musical notes are due to regular air-pulses, and that the pitch of the note depends on the frequency with which these pulses succeed each other, are too well known to require any extended notice. But although these phenomena and their laws have been known for a very long time, Chladni, late in the last century, was the first who discovered that there was a connection between sound and form.”

source here

(via mathrecpics)

sci-universe:

Astrophotography from 1908 – 1919  (about one hundred years ago!)
Image courtesy: Yerkes Observatory, Royal Observatory of Greenwich, Mount Wilson Observatory. Please don’t remove the credit.

(via sci-universe)

nevver:

Growing subway bacteria, Craig Ward

(via portlandcoffee)

skunkbear:

This is one slice of an incredible high resolution, enhanced color image of Pluto, recently released by NASA. You can see the full, larger version here. 

Credit: NASA/JHUAPL/SwRI

(via dreambuttt)

infinity-imagined:

Saturn’s Moon Hyperion, imaged by the Cassini Spacecraft on May 31st, 2015.

in-dubitable:

Photographs by Christian Pondella

Last year, Will Gadd ascended to the highest point in Africa, taking matters one step further by climbing the famous glaciers found at the peak of Mount Kilamanjaro in Tanzania.
At 19,341 ft (5,895 meters) above sea level, Kilimanjaro is the highest mountain in Africa and the highest free-standing mountain in the world. But according to NASA: “Between 1912 and 2011, the mass of ice on the summit decreased by more than 85 percent. Researchers say it’s no longer a question of whether the ice will disappear but when. Estimates vary, but several scientists predict it will be gone by 2060.”

(via chromauk)

nubbsgalore:

photos by john spies of the the sơn doòng cave in vietnam. at 200 metres high, 150 metres wide and five kilometres long, it is the biggest cave in the world — so large, it has its own river, jungle and even climate. it also contains the world’s tallest stalagmite, which stands over 80 metres tall (third photo). (stalagmites are formed one drop of water at a time, with minerals in the water building up over time) 

despite its immense underground size, the cave is practically invisible from the outside, seen only from the mist wafting from surface cracks. with a huge temperature difference between the cooler air inside the cave and warmer outside air, son doong is home to moving clouds of mist which, when illuminated by natural light as far as four kilometres away, create the surreal atmosphere seen in the photos.

(via spacetimewithstuartgary)