An astronaut aboard the International Space Station captured this photograph of part of Lake Van in Turkey, the largest soda or alkaline lake on Earth. [ 4928 x 3280 ]
“Everything, even something as mundane as getting out of the car can be fun if you find a right game.” - James Veitch
SpaceTime 20190503 Series 22 Episode 34 is now out
SpaceTime covers the latest news in astronomy & space sciences.
The show is available as a free twice weekly podcast through Apple Podcasts (itunes), Stitcher, Google Podcast, Pocketcasts, SoundCloud, Bitez.com, YouTube, Audio Boom, your favourite podcast download provider, and from www.spacetimewithstuartgary.com
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Today’s stories…
First results from ExoMars Trace Gas Orbiter During its first year in orbit the ExoMars Trace Gas Orbiter has made some surprizing discoveries about the impact of the recent global Martian dust storm and an apparent lack of methane in the red planet’s atmosphere.
Dragon spacecraft destroyed in dramatic explosion The first crew Dragon two capsule which successfully flew to the International Space Station in March has been destroyed in a major explosion at the Cape Canaveral air force station in Florida.
Stratolaunch test flight Stratolaunch has successfully undertaken the first test flight of the company’s behemoth twin fuselage six engine jetliner designed to launch satellites into space.
May Skywatch We tour the night skies of May which play host to the annual Eta-Aquarids meteor shower generated by Halley’s Comet.
Last Wednesday’s show…
New model for Nova explosions Scientists will need to go back to the drawing board to come up with new ways in which powerful explosions – known as novae – can occur on the surfaces of white dwarf stars.
Explaining super-luminous novae Astronomers have discovered that shockwaves generated during nova explosions can dramatically amplify their power and brightness.
NASA’s InSight Detects First Likely ‘Quake’ on Mars NASA’s Mars InSight lander has measured and recorded for the first time ever a likely “marsquake.”
New physics needed to explain differences in the Hubble Constant New observations are showing that differences in how fast the universe is expanding now compared to how fast it was expanding billions of years ago are no statistical accident.
The Science Report Climate change is now threatening the world’s doomsday vault. The world’s second largest colony of emperor penguins almost wiped out. Extreme ocean winds and wave heights are increasing around the globe. A small bone behind the knee, which was once rare in humans is becoming more common. Palaeontologists have unearthed a new species of hadrosaur dinosaur in Mongolia. History revisionists spewing lies and cherry-picked half-truths for racist and political propaganda
SpaceTime Background SpaceTime is Australia’s most respected astronomy and space science news program. The show reports on the latest stories and discoveries making news in astronomy, astrophysics, cosmology, planetary science, galactic and stellar evolution, physics, spaceflight, and general science. SpaceTime features interviews with leading Australian scientists about their latest research. The show is broadcast coast to coast across the United States by the National Science Foundation on Science360 Radio and around the world on Tune in Radio. SpaceTime is available in Australia as a twice weekly podcast which averages around three million downloads annually. It’s hosted on line through Bitez.com on all major podcast platforms. SpaceTime began life in 1995 as ‘StarStuff’ on ABC NewsRadio. Stuart Gary created the show while he was NewsRadio’s Science Editor, evening presenter, and news anchor (a position he held for more than 17 years). Gary wrote, produced and hosted StarStuff, consistently achieving 9 percent of the Australian radio audience share - according to Neilsen ratings survey figures for the five major Australian metro markets (Sydney, Melbourne, Brisbane, Adelaide, & Perth). The StarStuff podcast was hosted by ABC Science on line achieving over 1.3 million downloads annually. Sadly, the popular program was axed in 2015 during ABC budget cuts. Rather than remain with the ABC, Gary resigned to continue producing the show independently and rebranding it as SpaceTime. The first episode of SpaceTime was broadcast on February 8th 2016 and the show has been in continuous production ever since. SpaceTime now reaches an audience almost three times greater that it achieved as StarStuff and continues to grow.
“This is not some fringe idea, where a few contrarian scientists are overemphasizing a small difference in the data. If both groups are correct — and no one can find a flaw in what either one has done — it might be the first clue we have in taking our next great leap in understanding the Universe. Nobel Laureate Adam Riess, perhaps the most prominent figure presently researching the cosmic distance ladder, was kind enough to record a podcast with me, discussing exactly what all of this might mean for the future of cosmology.
It’s possible that somewhere along the way, we have made a mistake somewhere. It’s possible that when we identify it, everything will fall into place just as it should, and there won’t be a controversy or a conundrum any longer. But it’s also possible that the mistake lies in our assumptions about the simplicity of the Universe, and that this discrepancy will pave the way to a deeper understanding of our fundamental cosmic truths.”
In science, if you want to know some property of the Universe, you need to devise a measurement or set of measurements you can make to reveal the quantitative answer. When it comes to the expanding Universe, we have many different methods of measuring light that fall into two independent classes: using the imprint of an early relic and using the cosmic distance ladder. These two techniques each give solid results that are mutually inconsistent: the distance ladder teams find results that are higher than the early relic teams by about 9%. Since the errors are only about 1-2% on each measurements, this has been dubbed cosmology’s biggest controversy.
But perhaps it’s not about “who is right,” but rather about “what is the Universe doing?” Perhaps it’s a clue, not a controversy. Come learn about the cutting-edge science behind this fascinating and unexpected result.
“Nikola Tesla On Top Of Pike’s Peak.” Denver Rocky Mountain News, May 17, 1899.
Researchers have taught an artificial intelligence program used to recognize faces on Facebook to identify galaxies in deep space.
The result is an AI bot named ClaRAN that scans images taken by radio telescopes.
Its job is to spot radio galaxies – galaxies that emit powerful radio jets from supermassive black holes at their centers.
Keep reading
Chemical Gardens, a new investigation aboard the International Space Station takes a classic science experiment to space with the hope of improving our understanding of gravity’s impact on their structural formation.
Here on Earth, chemical gardens are most often used to teach students about things like chemical reactions.
Chemical gardens form when dissolvable metal salts are placed in an aqueous solution containing anions such as silicate, borate, phosphate, or carbonate.
Delivered to the space station aboard SpaceX’S CRS-15 cargo mission, the samples for this experiment will be processed by crew members and grown throughout Expedition 56 before returning to Earth.
Results from this investigation could provide a better understanding of cement science and improvements to biomaterial devices used for scaffolding, for use both in space and on Earth.
Follow the growth of the chemical garden and the hundreds of other investigations constantly orbiting above you by following @ISS_Research on Twitter.
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