A white dwarf star that has morphed into a massive pulsing crystal.
A white dwarf star that has morphed into a massive pulsing crystal.
Tag: science
Mercury, world of fire.
Mercury, world of fire.
A science poster released at an American Geophysical Union conference this week finds again that the global warming climate models used by policy makers have all failed to predict what has actually happened.
The uncertainty of science: A science poster released at an American Geophysical Union conference this week finds again that the global warming climate models used by policy makers have all failed to predict what has actually happened.
Some devastating quotes from the poster:
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The Dutch social psychologist Diederik Stapel — who made up fake data for at least 30 published papers — has reached an out-of-court settlement with prosecutors.
The Dutch social psychologist Diederik Stapel — who made up fake data for at least 30 published papers — has reached an out-of-court settlement with prosecutors.
After ten years of operation, NASA has turned off its Galaxy Evolution Explorer (GALEX) space telescope.
After ten years of operation, NASA has turned off its Galaxy Evolution Explorer (GALEX) space telescope.
In a first-of-a-kind move for NASA, the agency in May 2012 loaned GALEX to the California Institute of Technology in Pasadena, which used private funds to continue operating the satellite while NASA retained ownership. Since then, investigators from around the world have used GALEX to study everything from stars in our own Milky Way galaxy to hundreds of thousands of galaxies 5 billion light-years away.
It appears this loan arrangement has now ended because of a lack of funds. Either way, it always baffles me when NASA shuts down a working science telescope merely because it has been operating for a long time. Eventually the space agency will call for a replacement, the building of which will be far more expensive than it would have been to keep the original in operation.
Voyager 1 has found the edge of the solar system to be far more complex than predicted by scientists.
The uncertainty of science: Voyager 1 has found the edge of the solar system to be far more complex than predicted by scientists.
Scientists had assumed that Voyager 1, launched in 1977, would have exited the solar system by now. That would mean crossing the heliopause and leaving behind the vast bubble known as the heliosphere, which is characterized by particles flung by the sun and by a powerful magnetic field.
The scientists’ assumption turned out to be half-right. On Aug. 25, Voyager 1 saw a sharp drop-off in the solar particles, also known as the solar wind. At the same time, there was a spike in galactic particles coming from all points of the compass. But the sun’s magnetic field still registers, somewhat diminished, on the spacecraft’s magnetometer. So it’s still in the sun’s magnetic embrace, in a sense.
Orbital Sciences’ Pegasus rocket this evening successfully launched NASA’s newest solar research satellite, the Interface Region Imaging Spectrograph (IRIS).
Orbital Sciences’ Pegasus rocket this evening successfully launched NASA’s newest solar research satellite, the Interface Region Imaging Spectrograph (IRIS).
Kepler’s planet-hunting predecessor, COROT, has been shut down.
Kepler’s planet-hunting predecessor, CoRoT, has been shut down.
CoRoT suffered a computer failure on November, 2, 2012 and although the spacecraft is capable of receiving navigational commands, the French Space Agency CNES reports it can no longer retrieve data from its 30-centimeter telescope. After a valiant effort to try and restore the computer, CNES announced this week that the spacecraft has been retired. CoRoT’s journey will come to a fiery end as it will be deorbited and it will burn up on re-entry in Earth’s atmosphere.
CoRoT found 32 exoplanets with at least a hundred more candidates still to be confirmed.
Astronomers have found a solar system with six exoplanets, three in the habitable zone.
Worlds without end: Astronomers have found a solar system with six exoplanets, three in the habitable zone.
These planets orbit the third fainter star of a triple star system. Viewed from one of these newly found planets the two other suns would look like a pair of very bright stars visible in the daytime and at night they would provide as much illumination as the full Moon. The new planets completely fill up the habitable zone of Gliese 667C, as there are no more stable orbits in which a planet could exist at the right distance to it.
The planets in the habitable zone are all super-Earths.
Update: you can download and read the science paper here.
As a scientist, I find sloppiness at this level not only stupid, not only time-wasting, but downright offensive.
Scientists have finally discovered the forgotten formula for the concrete the Romans used.
Scientists have finally discovered the forgotten formula for the concrete the Romans used.
The secret to Roman concrete lies in its unique mineral formulation and production technique. As the researchers explain in a press release outlining their findings, “The Romans made concrete by mixing lime and volcanic rock. For underwater structures, lime and volcanic ash were mixed to form mortar, and this mortar and volcanic tuff were packed into wooden forms. The seawater instantly triggered a hot chemical reaction. The lime was hydrated—incorporating water molecules into its structure—and reacted with the ash to cement the whole mixture together.”
The Portland cement formula crucially lacks the lyme and volcanic ash mixture. As a result, it doesn’t bind quite as well when compared with the Roman concrete, researchers found. It is this inferior binding property that explains why structures made of Portland cement tend to weaken and crack after a few decades of use, Jackson says.
6 places we like to go to right now
Six places we like to go to right now.