『Travelers In The Night』のカバーアート

Travelers In The Night

Travelers In The Night

著者： Albert D. Grauer
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 A real "Science Snack" for anyone who is interested in the extraterrestrial.
Dr. Al Grauer is a member of the Catalina Sky Survey which has led the world in near Earth asteroid discoveries for 17 of the past 19 years.
The music is "Eternity" by John Lyell.
Astronomy Asteroids Space NASA Comets Earth Impact AliensAlbert D. Grauer 天文学 天文学・宇宙科学 科学
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  • 363E-395-House Sized Space Rocks

    363E-395-House Sized Space Rocks
    2025/11/18
    Throughout history small close approaching space rocks have been a part of our environment. Now, thanks to improved telescopes and cameras, asteroid hunters are routinely discovering these small asteroids as they pass closer than the Moon is to us. Since these tiny asteroids are only bright enough to detect for a few days out of their long, many month duration paths about the Sun, astronomers have had difficulty in determining how many of these small space rocks may exist in near Earth space. This effort received more emphasis when a house sized space rock exploded over Chelyabinsk, Russia in 2013 releasing about 10 times the energy of the Hiroshima atomic bomb. Although this asteroid was tiny compared to the one that ended the dinosaurs rule of the planet, the air blast the Chelyabinsk bolide produced caused nearly 1,500 human injuries and damaged more than 7,000 buildings. In a 2017 paper in the Astronomical Journal, Dr. David Trilling of Northern Arizona University and his group of researchers present data from the Blanco 4 meter telescope at the Cerro Tololo Inter-American Observatory in Chile which they use to estimate that there are approximately 3.2 million Earth approaching asteroids similar in size to the Chelyabinsk impactor. My team the Catalina Sky Survey uses 4 telescopes, 24 nights per month, in the mountains north of Tucson, Arizona with the goal to provide warnings for people to stay away from doors and windows should a Chelyabinsk sized space rock be on an impact trajectory with planet Earth.
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    2 分
  • 875-Newly Discovered Crater - 9:28:25, 6.13 PM

    875-Newly Discovered Crater - 9:28:25, 6.13 PM
    2025/11/14
    Dr Uisdean Nicholson from Heriot-Watt University and his team of 9 co-authors analyze 3D seismic imaging and drill cuttings from a 1980s oil well to make a convincing case that the Silverpit crater was produced by a the impact of a 1.5 football field diameter asteroid approximately 45 million years ago.
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    2 分
  • 362E-394-Tiny Beasts

    362E-394-Tiny Beasts
    2025/11/11
    Humans have a long history of partnerships with a variety of micro organisms. Although the proportions vary widely with individuals, recent scientific estimates suggest that a typical human being has approximately the same number of bacteria and other microbes as they do actual human cells. Now it appears that a partnership with yeast and algae will enable spacefaring humans to use their waste products to produce food and plastics during long duration space flights. Dr. Mark Blenner of Clemson University leads a research group developing strains of yeast which obtain their nitrogen from untreated urine and their carbon dioxide from exhaled breath or the Martian atmosphere which has been converted into yeast food by algae. One of Blenner's yeast strains produces omega-3 fatty acids which are essential for heart, eye, and brain health while another strain of yeast has been engineered to produce polyester polymers which could be used by 3D printers to produce plastic tools and other useful devices. In the future research Blenner's team will focus on increasing the output of these tiny beasts to the point that they will generate useful amounts of nutrients and plastics from astronaut's waste products. This new research when added to the fact that on the International Space Station space travelers now routinely drink recycled water from their urine, sweat, and showers moves us closer to the day when space travelers literally use and reuse every atom that they lift from the Earth's surface enabling journeys that may last for years. The flip side of our partnership with microorganisms is that it is extremely difficult to protect the worlds we explore from a microorganism invasion which would threaten their home grown biology.
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    2 分
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