Travelers In The Night

De: Albert D. Grauer
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  • Resumen

  • 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
    Albert D. Grauer
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Episodios
  • 297E-316-Weird Centaur

    297E-316-Weird Centaur
    Aug 13 2024
    My Catalina Sky Survey teammate Richard Kowalski was surprised to find a moving point of light on some his images which was more than 50 times brighter than a typical Earth approaching object he observes . He was even more amazed when it was not cataloged as a known object and he reported his observations to the Minor Planet Center. A couple of hours before Richard spotted it, scientists using the Space Surveillance Telescope in New Mexico had picked up this unknown object on some of their images but did not immediately report their observations. For the next 67 hours the new object was tracked by telescopes at 24 different observatories around the world. These observations allowed the Minor Planet Center to calculate an orbit, give it the name 2016 WM48, and classify it as a Centaur. Centaurs are named after the mythical beasts which were half human and half horse perhaps because they have characteristics of both asteroids and comets. Richard's object, 2016 WM48, is about a mile in diameter. We don't know if it has rings, tiny moons, or a gas cloud surrounding it as some other Centaurs do. 2016 WM48 must have had a catastrophic collision in the past few million years which put it on a very elliptical path which is tipped at 60 degrees or so to the solar system's plane. Centaurs do not have stable orbits. Their paths are changed as they come near to the giant planets Jupiter, Saturn, Uranus, and Neptune. A Centaur's fate is to likely collide with the Sun or a planet or perhaps even be ejected from the solar system
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    2 m
  • 809- How Close Can An Asteroid Approach

    809- How Close Can An Asteroid Approach
    Aug 9 2024
    The Earth Minimum Orbit Intersection Distance or Earth MOID for short is the closest an asteroid can come to our home planet on it's current orbit.
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    2 m
  • 296E-314-Our Number

    296E-314-Our Number
    Aug 6 2024
    Recently my Catalina Sky Survey teammate Greg Leonard discovered, 2016 WJ1, a relatively large asteroid which can come close but will not hit the Earth. The extremely unlikely scenario of an impactor with our number on it would start the with the report of a fast moving point of light in the night sky. After a few days of data the Minor Planet Center would give it a name. Tracking the new asteroid, asteroid hunters would be alarmed as the chances that this object will impact the Earth starts to rise. Large telescopes would then be trained on it to obtain the pattern of colors in the light it reflects and use this information to determine its size, mass, and chemical composition. Hopefully this fictional impact would be far enough in the future so that humans could mount a space mission to intercept it and deflect it so that it would miss Earth. Even when a collision with this mythical object is certain, scientists would not be able to accurately predict its point of impact on the surface without additional tracking data. To be prepared civil defense organizations around the world would begin to think about the possibility of mass evacuations. Chances are that this would be a small object which would have a negligible effect on humanity. Much much much less likely is that this fictional impactor would be a once in every million years or so event which would cause global climate change disrupting human agriculture and plunge our society into a real crisis. The story you have just heard is a complete fantasy, however, there is a extremely tiny remote possibility that a real version of it could start tonight.
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    2 m
Astronomía
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