segunda-feira, 29 de outubro de 2012

Menschen zum Mars? | Projekt Zukunft


The Reality

 Sad, but true.

domingo, 28 de outubro de 2012

Ten Best Pictures From NASA's Cassini Probe—Saturn, More

 

Just Hanging Out - Saturn's heavily cratered moon Mimas seems to hover over its home planet in a 2007 Cassini image.  

Image courtesy SSI/NASA

terça-feira, 23 de outubro de 2012

The Science Behind Felix Baumgartner’s 128,000 Foot Skydive

When Felix Baumgartner dove out of a capsule head first at the edge of space over 24 miles above Earth, he didn’t just have technology helping him break the world record, he had science on his side.
Those simulations can look like these from SolidWorks, using sophisticated software that not only takes into account all the mathematical probabilities of a jump that high, but also show, in vivid detail, the physics and the physical forces that are working on his body as he plummets earthward. Using these simulations before his jump proves why Felix had to stay in a head down position in order to break the sound barrier.
The full article by Dr. Stephen Endersby from SolidWorks gives all the math and equations involved, but the basic problem was which would come first, the sound barrier or terminal velocity? Taking the opposing forces on Felix’s body — the accelerating force vs. the retarding drag — Dr. Endersby found that at 25 seconds of free fall from a height of 120,000 feet, Felix would still be accelerating. Read more.

sábado, 20 de outubro de 2012

quinta-feira, 18 de outubro de 2012

At Last, Earth-Sized Alien Worlds

The Kepler space telescope has spied evidence of two Earth-sized worlds in a star system 950 light-years away. Read more. CREDIT: Karl Tate, SPACE.com Contributor/ NASA/JPL-Caltech/T. Pyle

quarta-feira, 17 de outubro de 2012

Supernova SN1006


segunda-feira, 15 de outubro de 2012

PH1 : A planet in a four-star system


Labelled ‘Planet Hunters 1′ (or PH1) in a paper released today and submitted to the Astrophysical Journal, it is the first planet in a four-star system. It is a circumbinary planet – one which orbits a double star – and our follow-up observations indicate that there is a second pair of stars approximately 90 billion miles (1000 Astronomical Units) away which are gravitationally bound to the system.Read more.

domingo, 14 de outubro de 2012

Mission to the Edge of Space: Felix Baumgartner

"I love a challenge, and trying to become the first person to break the speed of sound in freefall is a challenge like no other."     

 Felix Baumgartner

sábado, 13 de outubro de 2012

Like Father, Like Son


Chemist Sven Hovmöller of Stockholm University had been trying for nearly a decade to determine the structures of materials known as quasicrystals and their nearly identical approximants.  Since their discovery in the lab, physicists had been working tirelessly to better understand the structure of quasicrystals. But because the existence of such materials was doubted for so long, computer programs currently used to interpret imaging data aren’t equipped to analyze the aperiodic structures.

Then, last summer, he had a seemingly off-the-wall idea. He’d enlist the aid of his 10-year-old son, Linus. “I thought, He’s a smart guy; maybe he could help me,” Hovmöller says.
The father-and-son team sat at the kitchen table for 2 days, poring over the dozens of electron microscopy images Döblinger had generated, as well as some X-ray diffraction data, which provides more precise information on the materials’ atomic positions.
 Hovmöller would explain to Linus what he was thinking about how the images all fit together, and when Linus didn’t understand something, he’d interrupt his father to ask. This made Hovmöller realize that he was rushing to conclusions. When he slowed down to clear up Linus’s confusion, he’d get new ideas. “In 2 days, we solved four new structures.”  Read more.

Soyuz success boosts Europe's GPS


To think about: Carl Sagan


Cientistas portugueses criam 'substituto' dos óculos

Um modelo que permite determinar a correção individualizada e adequada de cada olho humano está a ser desenvolvido por três cientistas portugueses, que viram o resultado do seu estudo publicado numa revista especializada norte-americana.
O objetivo é conseguir um modelo que permita encontrar uma "solução personalizada para cada doente, indo ao encontro das suas necessidades", disse à agência Lusa a médica oftalmologista Filomena Ribeiro, um dos elementos da equipa. São também autores do trabalho, publicado na revista online PLoS ONE, o oftalmologista António Castanheira-Dinis, da Faculdade de Medicina da Universidade de Lisboa, e o físico de Instituto Superior Técnico e especialista em ótica João Dias. Ler mais.

55 Cancri E: Diamond Planet 40 Light Years Away

 Yale researchers have discovered that a rocky super-Earth orbiting a nearby star is a diamond planet. “This is our first glimpse of a rocky world with a fundamentally different chemistry from Earth,” said Dr Nikku Madhusudhan, a Yale researcher in physics and astronomy and lead author of a paper to be published in the Astrophysical Journal Letters (arXiv.org version).
“The surface of this planet is likely covered in graphite and diamond rather than water and granite.”
The planet, called 55 Cancri e, has a radius twice Earth’s, and a mass eight times greater, making it a so-called super-Earth. It is one of five planets orbiting a sun-like star, 55 Cancri, that is located 40 light years from Earth yet visible to the naked eye in the constellation of Cancer. The planet orbits at hyper speed – its year lasts just 18 hours, in contrast to Earth’s 365 days. It is also blazingly hot, with a temperature of about 3,900 degrees Fahrenheit, researchers said, a far cry from a habitable world. Read more.

quinta-feira, 11 de outubro de 2012

Orbit problems?


John Gurdon: the beginning of a scientist

High School report card of John Gurdon,
 this years recipient of the Nobel Prize in Physiology or Medicine.

The Nobel Prize in Chemistry 2012



 

 

 

 

Robert J. Lefkowitz                                                                         

                                                                                                               Brian K. Kobilka

The Nobel Prize in Chemistry 2012 was awarded jointly to Robert J. Lefkowitz and Brian K. Kobilka "for studies of G-protein-coupled receptors".

The Nobel Prize in Physics 2012


 

 

 

 

 

   Serge Haroche                                                                                                     David J. Wineland

The Nobel Prize in Physics 2012 was awarded jointly to Serge Haroche and David J. Wineland "for ground-breaking experimental methods that enable measuring and manipulation of individual quantum systems"

 

segunda-feira, 8 de outubro de 2012

Minute Physics: Real World Telekinesis

How do magnets affect things at a distance? How does the Sun heat our planet from 93 million miles away? How can we send messages across the world with our cell phones? We take these seemingly simple things for granted, but in fact there was a time not too long ago when the processes behind them were poorly understood, if at all… and, to the uninformed, there could seem to be a certain sense of “magic” about them. Read more.






terça-feira, 2 de outubro de 2012

Name an Asteroid!

Do you want a chance to name an piece of the Solar System? In 2016 the OSIRIS-REx spacecraft will fly out to an asteroid and bring us back some samples. At the moment the asteroid has the code name 1999 RQ36, but the Planetary Society is offering students under the age of 18 the chance to come up with a cooler name.
To take part a parent or teacher must fill in an online form by 2 December 2012, including the name and a brief explanation as to why it was chosen. Read more.