In Spacefarers, Christopher Wanjek explores some pretty out-there ideas about space colonization (a future astronaut on Mars is illustrated above) with a down-to-Earth perspective.
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Orbits a red dwarf. Probably gravitationally locked too (always showing same side to parent star). So highly unlikely to be any complex life.
‘Intriguing’ world found in data from retired Kepler space telescope.
A team of transatlantic scientists, using reanalyzed data from National Aeronautics and Space Administration’s Kepler space telescope, has discovered an Earth-sized exoplanet orbiting in its star’s habitable zone, the area around a star where a rocky planet could support liquid water.
Scientists discovered this planet, called Kepler-1649c, when looking through old observations from Kepler, which the agency retired in 2018. While previous searches with a computer algorithm misidentified it, researchers reviewing Kepler data took a second look at the signature and recognized it as a planet. Out of all the exoplanets found by Kepler, this distant world – located 300 light-years from Earth – is most similar to Earth in size and estimated temperature.
This newly revealed world is only 1.06 times larger than our own planet. Also, the amount of starlight it receives from its host star is 75% of the amount of light Earth receives from our Sun – meaning the exoplanet’s temperature may be similar to our planet’s, as well. But unlike Earth, it orbits a red dwarf. Though none have been observed in this system, this type of star is known for stellar flare-ups that may make a planet’s environment challenging for any potential life.
“This intriguing, distant world gives us even greater hope that a second Earth lies among the stars, waiting to be found,” said Thomas Zurbuchen, associate administrator of NASA’s Science Mission Directorate in Washington. “The data gathered by missions like Kepler and our Transiting Exoplanet Survey Satellite (TESS) will continue to yield amazing discoveries as the science community refines its abilities to look for promising planets year after year.”
Continue reading “Earth-sized, habitable planet found hidden in early NASA Kepler data” »
No, it’s not a high budget Mission Impossible action movie, but it could have been. Tom Cruise wasn’t piloting a helicopter that grabbed a rocket falling back to the Earth. Instead, a crew wearing black Rocket Lab t-shirts with the words “recovery team” written on the back took the skies in helicopters to grab a falling rocket. Since it wasn’t Tom Cruise, the video of the team grabbing a rocket midflight ranked higher on the awesome scale.
A few weeks ago, Rocket Lab took a major step forward to recover boosters. In a recent release to media, Rocket Lab shared videos successfully grabbing a parachute & test booster out of the sky using a helicopter. On the first try, the helicopter grabbed the first stage test article with a grappling hook.
There are intrinsic risks with helicopters. Recently SpaceX lost a test article when it became necessary to prematurely drop a Crew Dragon test article. However, Rocket Lab did better in the Electron parachute tests. The success marks another step closer for the company in recovering the boosters it uses to launch small payloads into low earth orbit.
An asteroid the size of a house will pass the Earth Wednesday, eventually reaching a distance closer to Earth than the moon, according to AccuWeather.
The newly discovered Asteroid 2020 GH2 will pass within the orbit of the moon, about 223,000 miles away. It’s between 43 and 70 feet wide.
NASA’s asteroid watch regularly monitors the sky to watch out for astronomical objects that may pose a danger to hitting Earth.
A major finding in particle physics reminds us of the importance of robust preliminary results — and paves the way for more exciting discoveries.
When the American physicist Arthur Compton discovered that light waves behave like particles in 1922, and could knock electrons out of atoms during an impact experiment, it was a milestone for quantum mechanics. Five years later, Compton received the Nobel Prize for this discovery. Compton used very shortwave light with high energy for his experiment, which enabled him to neglect the binding energy of the electron to the atomic nucleus. Compton simply assumed for his calculations that the electron rested freely in space.
During the following 90 years up to the present, numerous experiments and calculations have been carried out with regard to Compton scattering that continually revealed asymmetries and posed riddles. For example, it was observed that in certain experiments, energy seemed to be lost when the motion energy of the electrons and light particles (photons) after the collision were compared with the energy of the photons before the collision. Since energy cannot simply disappear, it was assumed that in these cases, contrary to Compton’s simplified assumption, the influence of the nucleus on the photon-electron collision could not be neglected.
For the first time in an impact experiment with photons, a team of physicists led by Professor Reinhard Dörner and doctoral candidate Max Kircher at Goethe University Frankfurt has now simultaneously observed the ejected electrons and the motion of the nucleus. To do so, they irradiated helium atoms with X-rays from the X-ray source PETRA III at the Hamburg accelerator facility DESY. They detected the ejected electrons and the charged rest of the atom (ions) in a COLTRIMS reaction microscope, an apparatus that Dörner helped develop and which is able to make ultrafast reactive processes in atoms and molecules visible.
Simple rules generating complicated networks may be how to build the universe.
Contributing Correspondent
Materials scientists at Duke University have shown the first clear example that a material’s transition into a magnet can control instabilities in its crystalline structure that cause it to change from a conductor to an insulator.
If researchers can learn to control this unique connection between physical properties identified in hexagonal iron sulfide, it could enable new technologies such as spintronic computing. The results appear April 13 in the journal Nature Physics.
Commonly known as troilite, hexagonal iron sulfide can be found natively on Earth but is more abundant in meteorites, particularly those originating from the Moon and Mars. Rarely encountered in the Earth’s crust, most troilite on Earth is believed to have originated from space.
