May 25th, 2020 Live Astronomy Q&A Session with Prof. Chris Impey

Поделиться
HTML-код
  • Опубликовано: 22 дек 2024

Комментарии • 8

  • @sulucalc1744
    @sulucalc1744 4 года назад +1

    Timestamps / Questions
    0:00:45 Could space debris cause serious damage to SpaceX starlink satellites leading to a cascade effect. What is the current state of the art in space junk cleanup?
    0:03:08 Could a ring around a planetary body be made up of any substance at all? Could you have a ring around Saturn made up of glass?
    0:04:33 We know that we accelerate towards the earth when it's falling. Does the earth accelerate towards objects falling towards it even if it's by a tiny fraction?
    0:05:34 What happens if a human enters a black hole?
    0:07:05 What is the lowest theoretical temperature that occurs naturally in the universe?
    0:08:37 How often does the night sky repeat? [We] can see the same constellations around the same time every year, but considering the orbits of different things like planets and moons; how many years from now will the night sky as it is tonight be seen again? Is it possible to calculate?
    0:11:00 How does METI (Messaging to Extra-Terrestrial Intelligence) (how do these projects) decide what the messages of an interstellar message should contain? How do you know what to say?
    0:14:35 What effects will there be if the earths magentic field keeps on getting weaker? Would it be dangerous for human survival?
    0:16:12 What are your thoughts on UFO? Why do SETI (search for extraterrestrial intelligence) reasearchers ignore things like UFOs and UFO reports?
    0:19:47 For interstellar probes to reach higher speeds than possible with current propulsion, could we use some kind of gravity assist route through the planets for a very high exit velocity from the solar system to beat out chemical propulsion?
    0:22:14 Can we create a black hole on the earth?
    0:23:54 The SpaceX launch on Wednesay [May 27 2020] is postponed because of a 60% chance of bad weather? Why does the weather has to be favorable for a spaceship launch because spaceships are so massive and they look like they shouldn't be dependent upon the weather?
    0:27:17 Are there any theories or concepts related to astrophysics that you think are important but have found difficult to popularize?
    0:29:04 In the last few days a number of publications have suggested that scientists have found evidence for " a parallel universe where time runs backwards". Is there any substance to these claims or what is the scientific information behind those claims?
    0:30:45 [Are] crop circles made by aliens?
    0:33:12 Is there mathimatical evidence for anti-matter? Is antimatter a real thing or is it just a kludge to something that we try to explain but we don't really understand. What is the difference between antimatter and dark matter?
    0:37:50 How would we terraform a planet or a moon? If it's possible to do both, what are the necessary steps and what are the outcomes that we would be hoping for?
    0:41:07 [Migration of Exoplanets]: What happens to the moons or satellites around these migratory planets; do they also move or do they get misaligned and kicked out of the orbits?
    0:42:47 If you think that could be a star significantly larger in diameter than Uy Scuti anywhere in the universe or more generally what's the largest size a star could be?
    0:44:20 The north magnetic pole is moving but what about the south magnetic pole? Does anyone track it and is it moving as well?
    0:45:48 Is there any clue that the earth might start revolving in a clockwise direction or could reverse its direction of rotation?
    0:47:22 How can you tell if a planet had a different degree of tilt in the past?
    0:49:02 You've mentioned that our solar system is reasonably stable now. What would have to be the mass of an object that could destabilize the solar system? We hear from new discoveries about comets or asteroids flying by the sun. Could they destabilize our solar system?
    0:50:54 How is it possible for multiple objects to occupy a Lagrange point in the solar system? What are the Lagrange points?
    0:52:39 Is there any correlation or connection between the mass of a star or the mass of a planet and the number of planets it has or the number of moons that a planet has. Is there any way to predict or estimate this?
    0:54:37 [Estimate of] the observable universe contains 100 billion galaxies but also estimated of 2 trillion galaxies. Why is there a difference in these estimates and what is the real number?
    0:56:58 Do you have any thoughts or opinions about Stephen Wolframs physics project and its possible implications on astronomy, astrophysics or cosmology?
    1:00:06 What kind of inferences or information have we gotten from the samples collected from the moon?

  • @kristinavislapuufabayodotc1776
    @kristinavislapuufabayodotc1776 4 года назад

    Thank you!

  • @maliksaad3040
    @maliksaad3040 4 года назад

    When will the next live session held??

  • @maliksaad3040
    @maliksaad3040 4 года назад

    Is it truth that the moon was divided into two parts ?? If yes then what changes were occured at that moment?

  • @gitanjaliborah4677
    @gitanjaliborah4677 4 года назад

    Is the earth spinning motion is the cause of earth magnetic field??

  • @jeanbigboute
    @jeanbigboute 4 года назад

    Sorry to nitpick but Dirac predicted antimatter in '28 and Anderson detected the positron in '32. Lagrange: /Picard There. Are. Five. Points.

  • @drraoulestradamdesq8936
    @drraoulestradamdesq8936 4 года назад

    What is really out there