Tag: research finding
What is exploration, and what distinguishes it from travel, discovery, or adventure? Stewart Weaver’s survey of the history of exploration, published by Oxford University Press, offers a compelling set of answers. Along the way, Weaver identifies what defines exploration during each era and places these historic achievements in the largest possible global context: that of the natural history of the earth itself.
The red dwarf star, which has a mass about 8% that of the Sun and is orbited by a ‘brown dwarf’ companion, was discovered in 2013 in images recorded by NASA’s Wide-field Infrared Survey Explorer (WISE) mission. It is relatively nearby, at about 6 parsecs (19.6 light years) away.
In the paper, astronomers led by Eric Mamajek at the University of Rochester, New York, say they are 98% certain that Scholz’s star travelled through what is known as the “outer Oort Cloud” – a region at the edge of the Solar System filled with trillions of comets a mile or more across.
Astronomers say a red dwarf star and its brown dwarf companion passed within a light-year of our own sun 70,000 years ago, moving through the comets in the outer reaches of the Oort Cloud that surrounds our solar system.
Close encounters of the starry kind: Red dwarf passed within just 0.8 light years of our solar system
Dr Eric Mamajek, an astronomer at the University of Rochester who led the study, said that it is unlikely the star would have caused much disturbance to the scattered icy comets that orbit the outermost reaches of our solar system.
Although most materials slightly expand when heated, there is a new class of rubber-like material that not only self-stretches upon cooling; it reverts back to its original shape when heated, all without physical manipulation.
It used to be thought that the brain was hardwired and that, unlike other organs, it could not repair itself or restore lost functions once damaged or diseased. Now we know that, in fact, the brain is neuroplastic – that activity and mental experience can be used to change the structure of the connections within it
In a new study, Simon School professor used data science methodologies to take a closer look at what actually motivates candidates to “go negative.”