MIT OpenCourseWare (OCW), established in 2001, is a free, web-based publication of virtually all MIT course content, is open and available to the world and is a permanent MIT activity. It hosts 1 million visits each month; translations receive 500,000 more. The audience is 9% educators, 42% students and 43% self learners. 50 new courses are added and 100 courses are revised each year. OCW is supported by donations. ocw.mit.edu/... #Education #MIT_OCW
R136: "The largest stellar nursery in our local galactic neighborhood."
Methuselah Nebula MWP1: Beautiful Methuseleh, in the constellation Cygnus, is a mere 150 thousand years old, a cosmic blink of the eye but far older than the average nebula which lasts 10 - 20 thousand years. (Planetary nebulae are the brief final phase of stellar evolution as the central star shrugs off its outer layers to become a hot white dwarf.)
Interacting Galaxies Arp 273 taken by the Hubble Space Telescope: The larger of the spiral galaxies, known as UGC 1810, has a disk that is distorted into a rose-like shape by the gravitational tidal pull of the companion galaxy below it, known as UGC 1813. #Arp_273 #Hubble_Space_Telescope
Antarctica Icebergs: Stripes are formed by layers of snow that react to different conditions. Blue stripes are often created when a crevice in the ice sheet fills up with melt water and freezes so quickly that no bubbles form. via finetuneyou.com #Iceberg #Antarctica #finetuneyou
Supercell Thunderstorm by Sean Heavey, nationalgeographic: A supercell thunderstorm rolls across the Montana prairie at sunset. This was a winning shot in the 2010 National Geographic Nature Gallery Photo Contest. #Thunderstorm #Photography #Sean_Heavey #nationalgeographic
The Hall of Names at Yad Vashem designed by Moshe Safdie and Dorit Harel is a memorial to each and every Jew who perished in the Holocaust. This 10' cone displays 600 photos and fragments of Pages of Testimony, containing the names and biographical details of victims submitted by survivors, friends or family. Over two million Pages are stored around the outer edge of the Hall. via tinyurl.com/42dxudy Photo by ourlifeisaroadtrip. #Hall_of_Names #Yad_Vashem #Moshe_Safdie #Dorit_Harel #...
The deep blue Crystal Cave of Svmnafellsjvkull (CORR) in Iceland was created by the glacier from Vrffajvkull Volcano's icecap meeting the coastline. The deep blue color is due to centuries of compression removing air from the ice. via dailymail.co.uk Photo by Orvar Thorgeirsson #Vatnajvkull #Iceland #Crystal _Cave_of_Svmnafellsjvkull #Orvar_Thorgeirsson