Travelers In The Night

Albert D. Grauer
  • 4.9（25則評分）
  • 天文學
  • 每週更新兩次

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 Aliens

  1. 1 天前

    917-Space Dust

    As the Earth orbits the Sun at 18.5 mi/s it sweeps up about 100 tons of micrometeorites and space dust every day of which some 14 tons eventually makes it to the ground. You can even find some of these particles of space dust by using a magnet on material in the rain gutters attached to your roof.

    917-Space Dust

  2. 4 天前

    406E-447-Nuking An Asteroid

    Tonight, even though the chances are extremely slim, an asteroid hunter could find a sizable asteroid on a collision course with planet Earth. If we have decades warning, the potential impactor's arrival time could be changed by impacting the dangerous object with a high velocity mass or if we have less time we will need to nuke it which will either blow it to bits or give it a rocket like push.

    406E-447-Nuking An Asteroid

  3. 9月11日

    916-Past Glory

    When accurately recorded historical observations do not agree with what we what we see today it is often very rewarding to find out why. In modern telescopes we see Theta Eridani to a be pair separated by about 425 times our distance from the Sun orbiting a common center of gravity. Detailed observations of the spectrum of one of these show it to be itself a pair of stars orbiting each other every 4.1 days. One of this very close pair, as it is aging, dumps matter onto its companion causing it to brightened significantly. In the past this mass transfer rate was much higher than it is today and the naked eye brightness of Theta Eridani is fainter to us than it was long ago.

    916-Past Glory

  4. 9月8日

    405E-446-Asteroid Homestead

    In the future one can envision a space mining family boarding a descendent of the SpaceX Falcon Heavy Launch Vehicle for a trip into low Earth orbit. A few hundred miles above the Earth's surface they would rendezvous with their asteroid mining spacecraft which will be their home for the next five years or so.

    405E-446-Asteroid Homestead

  5. 9月4日

    915-Raining Comets

    The comets we observe generally start out as icy dirty snowballs of frozen gases like water and frozen carbon dioxide in the Oort cloud. If recent scientific analysis is correct, we are now witnessing a parade of comets produced by the passage of a star when our first ancestors began to roam the Earth in Africa.

    915-Raining Comets

  6. 9月1日

    404E-445-Not So Secret

    A partnership of humans and computers will help to minimize the damage when asteroid hunters find a space rock with our number on it.

    404E-445-Not So Secret

  7. 8月28日

    914-Deep Synoptic Array

    Looking into the sky at night with radio eyes you would not see the points of starlight forming the constellations instead you would see a very bright, colorful and wildly changing scene. In a desert valley near the Great Basin National Park Caltech is building the world’s largest radio telescope called the Deep Synoptic Array or DSA for short.

    914-Deep Synoptic Array

  8. 8月25日

    403E-444-Near Comets

    Although no comet nucleus impact on the Earth has been conclusively identified, there is some evidence that suggests the 1908 Tunguska event in Russia, which knocked down trees over a 770 square mile area, could have been caused by a fragment of Comet Encke. However there is no doubt that the Earth's collision with dust and small debris left trailing from comets produces some of the meteor showers we enjoy so much.

    403E-444-Near Comets
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4.9
（滿分 5 顆星）
25 則評分

簡介

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 Aliens

資訊

  • 創作者
    Albert D. Grauer
  • 活躍年代
    2015年 - 2026年
  • 集數
    1000
  • 年齡分級
    兒少適宜
  • 版權
    © Albert D. Grauer
  • 節目網站
    Travelers In The Night

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