Showing posts with label science. Show all posts
Showing posts with label science. Show all posts

Thursday, November 3, 2016

The O'Neill Cylinder


The O'Neill cylinder (also called an O'Neill colony) is a space settlement design proposed by American physicist Gerard K. O'Neill in his 1976 book The High Frontier: Human Colonies in Space. O'Neill proposed the colonization of space for the 21st century, using materials extracted from the Moon and later from asteroids.

An O'Neill cylinder would consist of two counter-rotating cylinders. The cylinders would rotate in opposite directions in order to cancel out any gyroscopic effects that would otherwise make it difficult to keep them aimed toward the Sun. Each would be 5 miles (8.0 km) in diameter and 20 miles (32 km) long, connected at each end by a rod via a bearing system. They would rotate so as to provide artificial gravity via centrifugal force on their inner surfaces.

While teaching undergraduate physics at Princeton University, O'Neill set his students the task of designing large structures in outer space, with the intent of showing that living in space could be desirable. Several of the designs were able to provide volumes large enough to be suitable for human habitation. This cooperative result inspired the idea of the cylinder, and was first published by O'Neill in a September 1974 article of Physics Today.

O'Neill's project was not completely without precedent. In 1954, the German scientist Hermann Oberth described the use of gigantic habitable cylinders for space travel in his book Menschen im Weltraum – Neue Projekte für Raketen- und Raumfahrt ("People in space – New projects for rockets and space travel"). (read more)


Sunday, August 7, 2016

it is wrong


"It is wrong always, 

everywhere, and for anyone, 

to believe anything upon insufficient evidence."


Wednesday, July 20, 2016

Friday, May 20, 2016

Tuesday, April 19, 2016

Aliens? Science goes in search of them.


Russian tycoon Yuri Milner is putting $100 million into a 10-year quest to find alien life by listening in on the universe with the most sensitive technology available. Stephen Hawking is an adviser & the inspiration behind it, Yuri tells us. The project is only about listening for alien signals not sending out messages as caution dictates. Finding out if we are alone in the universe is a big question for humanity. If life has no back up then the responsibility to cherish our world is even more enormous than we thought and questions of colonisation of the Moon or Mars arise. If we are not alone, then that would be our biggest challenge yet. All the raw data from the quest will be made available to academics and the public alike, and as no govts are involved, if they find alien life, we will know.