Outrider

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About Outrider

  • Rank
    Atom
  • Birthday 06/14/1966

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  • Gender
    Male
  • Location
    Alabama USA
  • Interests
    Lots
  • Favorite Area of Science
    Cosmology
  • Occupation
    Maintenance

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  1. First Interstellar Asteroid Observed

    We may now have an orgin for Oumuamua and its not as far away as first thought. Postdoctoral fellow Fabo Feng of the University of Hertfordshire claims that Oumuamua comes from a loose Stellar Association known as the Local Association which is part of Pleiades. https://theconversation.com/how-i-discovered-the-origins-of-the-cigar-shaped-alien-asteroid-oumuamua-89577 Also consensus has been building that Oumuamua is a comet with a cosmic ray baked on shell of hard rock with an icy core.
  2. Exoplanet discoveries

    Which makes some people like me and Fermi wonder where they are at. Maybe it will turn out that the UFO nuts were right all along. Yes I do as well. If Breakthrough Starshot stays on schedule (they won't) I will be 96 when the data starts coming in. I doubt I will make it. OTOH I am very grateful for what I have got to see. The Voyager spacecraft forever changed our views of the moons of gas and ice giants. I got to see Shoemaker-Levy slam into Jupiter. Recently we had a vistor from another star system Oumuamua. And its been confirmed that black holes do merger and neutron star mergers are the source of much (probaly all) of our heaviest elements. Its been a fine ride and I can't complain but sometimes I still do. I guess of all the upcoming things that I probably will see JWST excites me the most.
  3. Exoplanet discoveries

    Ok that makes more sense than what I said. From wiki (I'll post a link later) "A phased array of ground-based lasers would then focus a light beam on the crafts' sails to accelerate them one by one to the target speed within 10 minutes, with an average acceleration on the order of 100 km/s2, and an illumination energy on the order of 1 TJ delivered to each sail" Thats gonna be about 100 gigawatt for 10 minutes for each of 1,000 craft or the average output of a nuclear plant for seven days. Wiki says one by one but I have read other articles stating they might have 10 or more probes per sail. 3.5 x 3.5 cm and weighs 4 grams. But the Sprite is the prototype. The probe that actually makes the journey will be named StarChip and be 1 centimeter square and weigh 1 gram. The Sprite is solar powered and uses radio to communicate. StarChip will have a battery and use laser to communicate. 4 cameras, 4 processors, 4 thrusters, battery, navigation equipment and a laser for communication are planned. Launch is scheduled for 2036. I got most of that information from here. https://en.m.wikipedia.org/wiki/Breakthrough_Starshot I don't know and I don't know how they plan to direct the cameras from over 4 ly away. I suspect the probes are on their own once they are accelerated. A 150 mg atomic battery, powered by plutonium-238 or americium-241, is planned.
  4. Time and speed and how speed impacts time

    Because the resting clock is moving through time only while the moving clock is moving through time and space? X-posted with geordief
  5. Happy holidays from SFN

    Happy New Year!
  6. Exoplanet discoveries

    Yeah, there are plans on the table but nothing AFAIK green lighted so far. http://www.space.com/37952-hunting-second-earth-next-generation-telescopes.html Hubble's primary mirror is 2.4 meters in diameter and JWST's is 6.5 meters. So not quite 10 times as big but still a big step up. I wonder will I still be around to see it. Well the Breakthrough Starshot team is looking for one fifth the speed of light using nanoprobes called Sprites. Funded by billionaire Yuri Milner and guided by Facebook guru Marc Zuckerberg and Stephen Hawking. The team have 5 or 6 sprites in orbit right now testing the telemetry and electronics. At 1/5 the speed of light they could reach Proxima Centauri in 20 years. We could start receiving data in 24 years. Not bad! The Sprites will utilize solar sails driven by a high power laser. This is the biggest problem. How do you power this laser for 20+ years? One of the other big problems is the Sprites have no brakes. How do you image planets as you fly by at 100 million MPH? https://breakthroughinitiatives.org/initiative/3
  7. I just find it very strange that we can measure relativity through atomic clocks and then people automatically assume that we'd age differently because of speed just because the clocks move differently when they speed. I just can't make that mental jump. It makes no sense to me that ageing must be dependent upon a clock, or that just because a clock slows under certain conditions that the ageing process would slow too. 

    1. Outrider

      Outrider

      Well I am sorry but thats just what you have to accept. 

      StringJunky said it best: "Time is what clocks measure. A clock can be anything that has a rate of change, so an aging person can be a clock."

    2. StringJunky

      StringJunky

      Yes, the only difference between an aging person or an opening flower etc is that a clock is finitely graduated so that we can measure elapsed time to a finer degree or  some arbitrary precision..

  8. What loophole do you mean exactly? 

    1. Outrider

      Outrider

      As a new member you are only allowed 5 posts in the first 24 hours. You have managed 8 so far. Congrats

  9. Time and speed and how speed impacts time

    Yep that too but the first thing I had to loose was the notion that there was something special about the clocks. Exactly!
  10. I think you are doing fine on your own. I didn't really like Blindfold my ICE but the other four are great. Sorry I'm not more help but I got nothing.
  11. Time and speed and how speed impacts time

    This was very hard for me to wrap my mind around as well. Its not just the clocks everything is moving at a different rate including ageing processes. If you look out at earth from your spaceship traveling at near light speed not only will you see clocks moving slower but the people will be moving slowly as well.
  12. Exoplanet discoveries

    They are not being deceptive. They have different criteria. As it turns out my explanation was deficient. https://exoplanetarchive.ipac.caltech.edu/docs/exoplanet_criteria.html Maybe thats stupid to you but I really don't see it that way.
  13. Exoplanet discoveries

    Except that it is. https://www.seeker.com/exoplanet-count-blasts-through-the-1000-barrier-1767964789.html
  14. Exoplanet discoveries

    The Paris catalog adds an exoplanet as soon as an announcement is made. NASA only lists them after they have been published in a scientific journal. "No later than" launch date as opposed to the working launch date of March. I too am very excited to see these missions inching closer. A bit miffed as well the JWST original launch date was 2013 and just last spring it was slated for October of this year. TESS has suffered similar setbacks but appears to be on track for now. I know. These are big one shot missions and its important they get everything right. If JWST lives up to its potential it should go a long ways in telling us how empty or how crowded our galaxy is. JWST is expected to give us spectroscopy of exoplanets.
  15. Powerful Men, Beautiful Women, and Sex

    Not at all it's just if women are being abused because of the clothes they wear I would like to see some proof. By personal did you mean personal attack? I honestly have no idea why you would take it that way.