afro-dominicano:


theweekmagazine:

NASA’s new rover could explore frozen water in space


The prototype for a new NASA rover is being tested for underwater space exploration



Yaaaaaas send that to Europa asap!

afro-dominicano:

theweekmagazine:

The prototype for a new NASA rover is being tested for underwater space exploration

Yaaaaaas send that to Europa asap!

itsfullofstars:

a flyby of all known exoplanets around single stars

christinetheastrophysicist:


Creating Electricity with Caged Atoms

A lot of energy is wasted when machines turn hot, unnecessarily heating up their environment. Some of this thermal energy could be harvested using thermoelectric materials; they create electric current when they are used to bridge hot and cold objects. At the Vienna University of Technology (TU Vienna), a new and considerably more efficient class of thermoelectric materials can now be produced. It is the material’s very special crystal structure that does the trick, in connection with an astonishing new physical effect; in countless tiny cages within the crystal, cerium atoms are enclosed. These trapped magnetic atoms are constantly rattling the bars of their cage, and this rattling seems to be responsible for the material’s exceptionally favourable properties.
Read More.

christinetheastrophysicist:

Creating Electricity with Caged Atoms

A lot of energy is wasted when machines turn hot, unnecessarily heating up their environment. Some of this thermal energy could be harvested using thermoelectric materials; they create electric current when they are used to bridge hot and cold objects. At the Vienna University of Technology (TU Vienna), a new and considerably more efficient class of thermoelectric materials can now be produced. It is the material’s very special crystal structure that does the trick, in connection with an astonishing new physical effect; in countless tiny cages within the crystal, cerium atoms are enclosed. These trapped magnetic atoms are constantly rattling the bars of their cage, and this rattling seems to be responsible for the material’s exceptionally favourable properties.

Read More.

kenobi-wan-obi:


Hale-Bopp (1997)
by Bruno Cirillo

kenobi-wan-obi:

Hale-Bopp (1997)

by Bruno Cirillo

kenobi-wan-obi:


Sun’s Super-fast Plasma ‘Conveyor Belt’ Surprises Scientists

The sun's insides churn much more quickly than previously thought, a new study shows, a finding expected to improve predictions of solar storms that hurl charged particles at Earth.
Image: The sun's meridional circulation is shown in this artist's conception based on research at Stanford's Hansen Experimental Physics Laboratory. Credit: NASA SDO/HMI
The flow of plasma — superheated, electrically charged gas — within the sun is more complex than scientists had believed, the study found. Further, this flow extends only half as deep as predicted, to roughly 62,000 miles (100,000 kilometres) beneath the solar surface.
"Our previously held beliefs about the solar cycle are not totally accurate, and ... we may need to make accommodations," lead author Junwei Zhao, a senior research scientist at the Hansen Experimental Physics Laboratory at Stanford University, said in a statement.

Continue..

kenobi-wan-obi:

Sun’s Super-fast Plasma ‘Conveyor Belt’ Surprises Scientists

The sun's insides churn much more quickly than previously thought, a new study shows, a finding expected to improve predictions of solar storms that hurl charged particles at Earth.

Image: The sun's meridional circulation is shown in this artist's conception based on research at Stanford's Hansen Experimental Physics Laboratory. Credit: NASA SDO/HMI

The flow of plasma — superheated, electrically charged gas — within the sun is more complex than scientists had believed, the study found. Further, this flow extends only half as deep as predicted, to roughly 62,000 miles (100,000 kilometres) beneath the solar surface.

"Our previously held beliefs about the solar cycle are not totally accurate, and ... we may need to make accommodations," lead author Junwei Zhao, a senior research scientist at the Hansen Experimental Physics Laboratory at Stanford University, said in a statement.

Continue..

spaceplasma:

NASA Probe Gets Close Views of Large Saturn Hurricane

NASA’s Cassini spacecraft has provided scientists the first close-up, visible-light views of a behemoth hurricane swirling around Saturn’s north pole.

In high-resolution pictures and video, scientists see the hurricane’s eye is about 1,250 miles (2,000 kilometers) wide, 20 times larger than the average hurricane eye on Earth. Thin, bright clouds at the outer edge of the hurricane are traveling 330 mph(150 meters per second). The hurricane swirls inside a large, mysterious, six-sided weather pattern known as the hexagon.

“We did a double take when we saw this vortex because it looks so much like a hurricane on Earth,” said Andrew Ingersoll, a Cassini imaging team member at the California Institute of Technology in Pasadena. “But there it is at Saturn, on a much larger scale, and it is somehow getting by on the small amounts of water vapor in Saturn’s hydrogen atmosphere.”

Scientists will be studying the hurricane to gain insight into hurricanes on Earth, which feed off warm ocean water. Although there is no body of water close to these clouds high in Saturn’s atmosphere, learning how these Saturnian storms use water vapor could tell scientists more about how terrestrial hurricanes are generated and sustained.

Both a terrestrial hurricane and Saturn’s north polar vortex have a central eye with no clouds or very low clouds. Other similar features include high clouds forming an eye wall, other high clouds spiraling around the eye, and a counter-clockwise spin in the northern hemisphere.

A major difference between the hurricanes is that the one on Saturn is much bigger than its counterparts on Earth and spins surprisingly fast. At Saturn, the wind in the eye wall blows more than four times faster than hurricane-force winds on Earth. Unlike terrestrial hurricanes, which tend to move, the Saturnian hurricane is locked onto the planet’s north pole. On Earth, hurricanes tend to drift northward because of the forces acting on the fast swirls of wind as the planet rotates. The one on Saturn does not drift and is already as far north as it can be.

“The polar hurricane has nowhere else to go, and that’s likely why it’s stuck at the pole,” said Kunio Sayanagi, a Cassini imaging team associate at Hampton University in Hampton, Va.

Scientists believe the massive storm has been churning for years. When Cassini arrived in the Saturn system in 2004, Saturn’s north pole was dark because the planet was in the middle of its north polar winter. During that time, the Cassini spacecraft’s composite infrared spectrometer and visual and infrared mapping spectrometer detected a great vortex, but a visible-light view had to wait for the passing of the equinox in August 2009. Only then did sunlight begin flooding Saturn’s northern hemisphere. The view required a change in the angle of Cassini’s orbits around Saturn so the spacecraft could see the poles.

“Such a stunning and mesmerizing view of the hurricane-like storm at the north pole is only possible because Cassini is on a sportier course, with orbits tilted to loop the spacecraft above and below Saturn’s equatorial plane,” said Scott Edgington, Cassini deputy project scientist at NASA’s Jet Propulsion Laboratory in Pasadena, Calif. “You cannot see the polar regions very well from an equatorial orbit. Observing the planet from different vantage points reveals more about the cloud layers that cover the entirety of the planet.”

Cassini changes its orbital inclination for such an observing campaign only once every few years. Because the spacecraft uses flybys of Saturn’s moon Titan to change the angle of its orbit, the inclined trajectories require attentive oversight from navigators. The path requires careful planning years in advance and sticking very precisely to the planned itinerary to ensure enough propellant is available for the spacecraft to reach future planned orbits and encounters.

Image credit: NASA/JPL-Caltech/SSI

dollyfarton:

ineedmasculism:

lundsdotter:

The strongest ‘pound for pound’ muscle is the uterus: it weighs around 2 pounds but during childbirth can exert a downward force of 400 Newtons, which is one hundred times as strong as gravity and equivalent to the power in a fully extended modern longbow. 

I need masculism because I am afraid.

you should be

scinerds:


Scientists map protein that creates antibiotic resistance

Japanese researchers have determined the detailed molecular structure of a protein that rids cells of toxins, but can also reduce the effectiveness of some antibiotics and cancer drugs by kicking them out of the cells they are targeting.
The scientists have also identified a molecule that can thwart the activity of the protein, one of a class known as multidrug and toxic compound extrusion transporters (MATEs) that are found in cell membranes. The discovery suggests new approaches to combat antibiotic resistance and boost the power of cancer therapies, the team reports today in Nature.
Previous efforts to identify compounds that block MATE transporters have been unsuccessful, partly because researchers had a poor understanding of how these proteins work. But in the past three years scientists have made some progress mapping the transporters’ detailed architecture. Two different labs have already revealed the structures of two bacterial MATE proteins, suggesting a mechanism by which the proteins extrude toxins from cells.
“I think this is a major step forward,” says Hendrik Van Veen, a pharmacologist at the University of Cambridge, UK. “They have a direct mechanism of how the protons change the shape of the cavity.”

Full Article

scinerds:

Scientists map protein that creates antibiotic resistance

Japanese researchers have determined the detailed molecular structure of a protein that rids cells of toxins, but can also reduce the effectiveness of some antibiotics and cancer drugs by kicking them out of the cells they are targeting.

The scientists have also identified a molecule that can thwart the activity of the protein, one of a class known as multidrug and toxic compound extrusion transporters (MATEs) that are found in cell membranes. The discovery suggests new approaches to combat antibiotic resistance and boost the power of cancer therapies, the team reports today in Nature.

Previous efforts to identify compounds that block MATE transporters have been unsuccessful, partly because researchers had a poor understanding of how these proteins work. But in the past three years scientists have made some progress mapping the transporters’ detailed architecture. Two different labs have already revealed the structures of two bacterial MATE proteins, suggesting a mechanism by which the proteins extrude toxins from cells.

“I think this is a major step forward,” says Hendrik Van Veen, a pharmacologist at the University of Cambridge, UK. “They have a direct mechanism of how the protons change the shape of the cavity.”

Full Article

the-science-llama:

Closest Star System Found in a Century

Say hello to our new neighbors.

The star system is named “WISE J104915.57-531906″ because it was discovered in a map of the entire sky obtained by the NASA-funded Wide-field Infrared Survey Explorer (WISE) satellite. It is only slightly farther away than the second-closest star, Barnard’s star, which was discovered 6.0 light years from the Sun in 1916. The closest star system consists of Alpha Centauri, found to be a neighbor of the Sun in 1839 at 4.4 light years, and the fainter Proxima Centauri, discovered in 1917 at 4.2 light years.

First question, how did we miss this?

The new system is a binary system of brown dwarfs which are stars that are too small in mass to ever become hot enough to ignite hydrogen fusion. As a result, they are very cool and dim, resembling a giant planet like Jupiter more than a bright star like the sun. Oh that’s how we missed it.

Via NASA, Earthsky