Today is the birthday of Edouard Roche, born October 17, 1848 in Montpellier, France (one of my favorite cities), for whom the Roche limit or Roche Radius is named.  

The Roche limit is the distance within which a celestial body, held together only by its own gravity, will disintegrate due to the tidal forces exhibited by a second  body, the second body’s forces exceeding the first body’s gravitational self-attraction.  Inside the Roche radius, orbiting material is spread around and forms rings whereas outside the limit material tends to coalesce and reform.  Roche was the first astronomer to note that just as the moon attracts the Earth’s water, the gravitational pulls of multiple objects in space could be large enough to pull a body apart.  The rings of Saturn are a great example.

Image of Edouard Roche in the Public Domain.  Image of Saturn courtesy NASA.

Do you have any weapons on you?

He sprinted, half believing he could outdistance death itself, ignoring the jets of light flying in the darkness all around him, and the sound of the lake crashing like the sea, and the creaking of the Forest though the night was windless; through grounds that seemed, themselves, to have risen in rebellion, he ran faster than he had ever moved in his life…

Greta Garbo, The Mysterious Lady (1928)

Greta Garbo, The Mysterious Lady (1928)

teacher: the sun is the hottest thing in the universe
me: i don't wanna sound rude but have u seen chris evans

Some guy just called me a Yankee. I wasn’t aware people still did that down here.

Some guy just called me a Yankee. I wasn’t aware people still did that down here.

url graphic for stargazingsam

url graphic for stargazingsam



This does a good job at showing how ridiculously free-for-all and confusing WWI was.

Russia wakes up with a complete personality change lmfao

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cute date idea: five year mission in space exploring strange new worlds, seeking out new life and new civilizations, boldly going where no man has gone before