『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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  • 871-New Mars Trojan

    871-New Mars Trojan
    2025/10/17
    The Lagrange point L4 is 60° ahead of Mars whereas L5 is 60° behind Mars on the red planet’s orbital path about the Sun. An object placed at either of these locations is trapped gravitationally and is likely to remain there indefinitely. The Mars L4 and L5 locations could provide a permanent place for staging and resupply missions to Mars and would give humans a different view of space weather and its effects on our home planet.
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    2 分
  • 358E-389-Tiny Spacecraft

    358E-389-Tiny Spacecraft
    2025/10/14
    To reach the vicinity of the nearest star, 24 trillion miles away, in less than 20 years, an interstellar space probe would have to travel at a substantial fraction of the speed of light. Newton's laws of motion, published 300 years ago, predict that the greater the mass of an object the greater is the force required to increase it's velocity. In order to alleviate the need for the virtually unaffordable amount of energy required to accelerate a normal sized spacecraft to a speed of 20% of the speed of light, the Breakthrough Starshot program has funded the creation of 'Sprite' , the world's smallest spacecraft. About the size of a saltine cracker and having a mass of less than 2 dimes, the single-board Sprite spacecraft has all the essentials; solar panels, computing electronics, thermometers, gyroscopes, radio communication equipment and more. Working prototypes have been launched into Earth orbit by the Indian Space Research Organization attached to the Italian Max Valier and Latvian Ventra satellites. One of them has sent back signals which have been received by Cornell University's ground station. Dr. Zac Manchester who started the Sprite Spacecraft program while earning a PhD at Cornell University envisions using tiny spacecraft to explore near Earth Space as well as asteroids and moons in our solar system. In the future, fleets of the decedents of Sprite could be sent to explore intriguing planets in nearby alien solar systems. These tiny explorers will be propelled by high power Earth bound lasers directed at their solar sails and could reach and explore distant planets in a reasonable amount of time.
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    2 分
  • 870-Satellite Ashes

    870-Satellite Ashes
    2025/10/10
    50 years ago scientists found that Chlorofluorocarbons or CFC chemicals in widespread use in refrigeration, air conditioning , and hair spray were beginning to damage the ozone layer in the Earth’s stratosphere which blocks harmful Solar UVB radiation from reaching the surface. The world wide response was the Montreal Protocol banning these chemicals from being released into the atmosphere. It saved millions of humans from dying of skin cancer. Satellite ashes are a new threat to the protective ozone layer.
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    2 分
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