quarta-feira, 25 de setembro de 2013

Why a Water Bridge Doesn't Collapse


 If you apply an electric voltage across two water-filled beakers and separate them, something strange happens: The water stretches from beaker to beaker, creating a bridge that defies gravity. Water bridges were discovered 120 years ago, but no one has ever been sure why they do not collapse. Read more.


domingo, 22 de setembro de 2013

Astronomy for the Public


                     

Uma pausa com: Cosmic Love


Fall


sábado, 21 de setembro de 2013

CERN Open Days


Leaf Colour Chart

A sure sign of the onset of autumn can be seen in the leaves of trees. During the spring and summer the leaves have served as factories where most of the foods necessary for the tree's growth are manufactured.
The process, known as photosynthesis, takes place in the leaf in numerous cells containing chlorophyll a and b. Chlorophyll a molecules absorb light at a wavelength of 400-500nm, while chlorophyll b absorbs light in the 550-700nm as a result, the green spectrum is reflected and this is what we see. Along with the green pigment are yellow to orange pigments; carotenes and xanthophyll, however most of the year these colours are masked by great amounts of chlorophyll. 

sexta-feira, 20 de setembro de 2013

Royal Observatory Greenwich Announces Astronomy Photographers of the Year

Guiding Light to the Stars by Mark Gee (Australia)
 
Rho Ophiuchi and Antares Nebulae by Tom O’Donoghue (Ireland)



quarta-feira, 18 de setembro de 2013

Origins 2013 - a European Researchers’ Night event

 Origins 2013 - a European Researchers’ Night event

Friday September 27 2013, in Paris, Geneva and Bologna

NASA Invites Public To Q&A Session With Women Working On Webb Telescope



Announcing a Q&A on Reddit with women working on the James Webb Space Telescope! Ask your questions Thurs, Sept. 26, 2pm ET. Read more.

ESA Kids


Noite Europeia dos Investigadores 2013


What Direction Does Earth's Center Spin? New Insights Solve 300-Year-Old Problem

Researchers have solved a 300-year-old problem by demonstrating that the Earth's inner core, which is made up of solid iron, spins in an eastward direction, rotating faster than the rest of the planet due to the behaviour of the outer core, which is comprised mainly of molten iron and spins westward at a slower pace. This is a response to the Earth's geomagnetic field. Read more.

quarta-feira, 11 de setembro de 2013

NASA Maps Out Goals for Europa Landing



The top priority of a robotic lander mission to Jupiter’s potentially life-supporting moon Europa should be investigating the composition and chemistry of its subsurface ocean, scientists say.
Such a mission should also aim to determine the thickness and dynamics of the moon’s ice shell and characterize the surface geology of Europa in detail, a NASA-appointed “science definition team” reports in a new study in the journal Astrobiology. Read more.

Spiders on drugs

During this experiment, spiders were exposed to a variety of drugs to help determine their effect on the brain.  Spiders who had been given marijuana started out well enough, but were unable to maintain focus.
Benzedrine (speed) produced spiders who spun enthusiastically, though no great thought or care was put into the web design.
Caffeine, one of the most common stimulants taken by humans, produced an erratic web.
Chloral hydrate, an ingredient in sleeping pills, made the spiders doze off after barely getting started on the web.
Though this 1995 experiment sought to determine toxicity of drugs, it was a continuation of experimentation of spiders on drugs that had started in 1948 by P. N. Witt.

Mars One



Mars 2023 - Inhabitants wanted 

Já são mais de 200 mil as pessoas que prestaram as provas que ditam a seleção para o projeto "Mars One", um "reality show"que marcará a primeira expedição do homem a Marte. Além disso, o objetivo desta iniciativa, de uma organização sem fins lucrativos holandesa, é o de estabelecer uma colónia humana em 2023, com o envio de quatro astronautas que viverão num piso assente em energia solar e com os elementos necessários de habitabilidade. Ler mais.

segunda-feira, 2 de setembro de 2013

Science news