『Travelers In The Night』のカバーアート

Travelers In The Night

Travelers In The Night

著者： Albert D. Grauer
無料で聴く

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
  • 390E-427-Meteor Whispers

    390E-427-Meteor Whispers
    2026/05/26
    Often observers report hearing a percussive sound, like a sonic boom from an aircraft, minutes after viewing a bright meteor fireball. In addition, in a fewer number of instances, there are many reliable reports of observers hearing popping, hissing, and rustling sounds at the same time they are observing a very bright meteor traveling though the night sky. Professional astronomers have long dismissed these reports saying that what these people hear simultaneously with their visual observations cannot be due to to sound traveling from the meteors path since sound travels 800,000 times slower than light and would take 1.5 to 4 minutes to traverse the distance that the light does in a tiny fraction of a second. Recent scientific studies have begun to shed light on the interesting mystery of how the small number of what we now call electrophonic meteors produce simultaneous light and sound. One theory is that the flickering bright light produced in the meteor's path is absorbed by by hair or other material near the observer's ears producing acoustic sound waves. An alternate hypothesis is that as the meteor streaks through our atmosphere it ionizes air molecules whose motion in the Earth's magnetic field generates radio waves which travel to objects near to the observer causing them to vibrate and thus produce sound. Either way observers with large amounts of hair or those near metallic objects like barbed wire fences are the most likely to hear these strange unusual sounds. If you are lucky you could hear a meteor's dying whispers and could even be the first person to record these sounds on your cell phone. For Travelers in the Night this is Dr. Al Grauer.

    © 2026. A. D. Grauer
    続きを読む 一部表示
    2 分
  • 900-Earth Life from Mars

    900-Earth Life from Mars
    2026/05/22
    Some of the 635,000 impact craters found on Mars are the result of such violent impacts that pieces of Mars are ejected, travel around the solar system, and a few become one of the several hundred Martian meteorites which have been discovered here on Earth. An experiment is described which does not prove we are descendants of martian bacteria however it does improve our ability to protect our planet and understand where life may be possible elsewhere in the universe.
    続きを読む 一部表示
    2 分
  • 389E-426-Rose Rules Again

    389E-426-Rose Rules Again
    2026/05/19
    389E-426-Rose Rules Again Recently my Catalina Sky Survey teammate Rose Matheny discovered 8 new Earth approaching object candidates on a single night with our Schmidt telescope on Mt. Bigelow, Arizona. One of them, 2017 YO is a mile and a half diameter, main belt asteroid, while the other 7 are interesting Earth approaching objects. Another one of Rose's single night discoveries is 2017 YM1. When Rose first spotted it this space rock was moving rapidly north, at 6.9 miles per second, away from the Earth in the constellation of Ursae Major. About 5 days earlier it had passed near both the Earth and Our Moon at which time it was too far south to be seen from Arizona. This space rock is about 92 feet in diameter, orbits the Sun once every 2.25 years, and can come to less than a tenth of the Moon's distance from us. 2017 YM1 is about 1.5 times larger than the Chelyabinsk (Shell ya binsk) meteor which in 2013 broke many thousands of windows and injured 1,200 people. According to Perdue University's impact calculator, a space rock like 2017 YM1 enters the Earth's atmosphere once every hundred years or so with an energy of 250 kilotons of TNT, explodes into a cloud of fragments at about 73,000 feet, rains pieces onto the ground, and produces a sonic boom that would get your attention as it breaks a lot of windows. Asteroid hunter's goal is to discover any such impactor days before it enters the Earth's atmosphere so that people can be warned to stay away from doors and windows. For Travelers in the Night this is Dr. Al Grauer.

    © 2026 A. D. Grauer
    続きを読む 一部表示
    2 分
adbl_web_anon_alc_button_suppression_c
まだレビューはありません