『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
エピソード
  • 906-Pierazzo Lunar Crater

    906-Pierazzo Lunar Crater
    2026/07/03
    The visually stunning Lunar Crater Pierazzo, named for the late Planetary Scientist Elizabeth “Betty” Pierazzo was observed by the Artemis II Crew as they passed over the Moon’s far side. It is a 5.9 mile diameter crater with white streaks or rays which extend more than 50 miles in all directions.
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    2 分
  • 395E-436-Lonely Asteroids

    395E-436-Lonely Asteroids
    2026/06/30
    Most asteroids are located in the lonely space between Mars and Jupiter where the average distance between two asteroids is about 600,000 miles. Even though there is a tremendous space between asteroids they occasionally collide and pieces of them become Earth approaching objects. Most of them remain close to the plane of the solar system, however, a few are sent on paths which take them into the extremely lonely space high above and far below the orbits of the planets about the Sun. In 2017, my team, the Catalina Sky Survey, discovered 13 of these loneliest asteroids whose paths are tilted more than 45 degrees to the plane of the solar system. They have an average diameter about 4 times larger than that of the 987 asteroids we discovered in 2017. Even though 13 is a small sample it is interesting to speculate what this size difference could mean. In 2013, astronomers used the Subaru Telescope on Mauna Kea in Hawaii to discover that main belt asteroids with orbits which are highly inclined to the plane of the solar system tend to be larger and made of stronger materials than those asteroids which reside in the plane of the solar system. They attribute these differences to the collisions which must have occurred to send asteroids into highly inclined orbits about the Sun. If this result applies to the lonely near Earth asteroids we discovered then perhaps they are made of very strong materials and could be of particular interest to asteroid miners.
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    2 分
  • 905-Hogan’s Interesting PHA

    905-Hogan’s Interesting PHA
    2026/06/26
    My Catalina Sky Survey teammate Josh Hogan has discovered a 2 football field diameter asteroid that was placed on NASA’s Sentry list because it has a tiny minuscule but non-zero chance of impacting our home planet. With this motivation my team the Catalina Sky Survey, the Pan STARRS group in Hawaii, the ATLAS group with telescopes Hawaii, Chile, and South Africa , the Vera C. Rubin telescope in Chile, will be soon joined NASA’s NEO Surveyor and groups world wide in a planet wide defense network.
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    2 分
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