Astronomy and space exploration

Discussion in 'General Discussion' started by eloyc, Apr 10, 2017.

  1. eloyc

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    :lol:
     
  2. eloyc

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    In a few hours (2:49 a.m. EST, 07:49 GMT):
    https://www.space.com/43231-spacex-demo-1-flight-iss-explainer.html

    Watch live here:
     
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  3. eloyc

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    I liked this video:
     
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  4. hoom

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    Another Electron Launch

    I love that you can hear native bird calls on the audio.

    Holy crap, looking at the wiki page future missions apparently they have 2* friggin' moon missions later in 2019 :cool2:
    https://en.wikipedia.org/wiki/MX-1E
    Gonna drop a little lander on Malapert Mountain on the South Pole which is nearly permanently in sunlight & has permanent LoS to Earth.
    [​IMG]

    I didn't even know it was possible for such a small rocket to generate enough velocity to get that far.

    Edit: updated video link since it broke.
     
    #424 hoom, Mar 29, 2019
    Last edited: Mar 29, 2019
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  5. eloyc

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    https://www.space.com/3d-printed-mars-habitats-nasa-prizes.html

    All of them look so nice!
     
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  6. eloyc

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    http://astronomy.com/news/2019/04/event-horizon-telescope-releases-first-ever-black-hole-image

    Lol at the comments!
     
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  7. nutball

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    There is a certain amount of silliness in those comments.

    The image is very impressive, given the angular sizes we are talking about. Maybe not as immediately majestic as some of the imagery to come from HST or the planetary missions within the Solar System, but microarcsecond imaging is challenging to say the least. Kind of reminds me of the ALMA images of a protoplanetary discs. All of those seminars I've sat through saying "this is what our theoretical models predict, obviously we'll never actually image this", well they have data now to challenge their models. Good stuff.
     
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  8. AlBran

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    How many telescopes do they need to zoom and enhance.

    Can the space telescope help?
     
  9. nutball

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    For better resolution it's not so much a question of more telescopes, just a longer baseline between them.

    From what I know of the EHT they are aiming at ~Earth diameter separation, but obviously going beyond that is a different ball-game altogether. Additional space-borne radio telescopes would potentially help a lot with resolving power, but would be very expensive. Data rates are high.

    Another option would be to try to perform the imaging at shorter wavelengths, but that carries it's own challenges.
     
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  10. eloyc

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    I haven't found any specific info on that.
     
  11. nutball

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    SpaceX nailed the landing of all three cores of a Falcon Heavy.
     
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  12. Gubbi

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    Right. The physical size of radio telescopes is a lot bigger than optical ones. The resolution is limited by the baseline distance, so you gain little by operating these telescopes in LEO. You would want to operate them in very high orbits which comes with a higher cost.

    Considering the bandwidth requirements got them to ship hard drives around the world I think it would be hard to communicate the data to earth.

    Cheers
     
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  13. nutball

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    Having some on the Moon might be a useful baseline, and from there it might be possible to use optical communication back to Earth for the high-bandwidth. There have already been proposals for radio telescopes on the far side of the Moon to block out unwanted radio spam from the human race. Options such as that though are easily 50 years away.
     
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  14. AlBran

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    Ah, so there is a chance I might see the ass end of space in Really Really Really Ridiculously Good Looking Definition (assuming climate change deniers don’t kill me first)
     
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  15. Davros

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    The big news in astonomy this week


    An explanation of the image
     
    #435 Davros, Apr 12, 2019
    Last edited: Apr 12, 2019
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  16. hoom

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    Thunderf00t does one about the size
     
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  17. eloyc

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    A bit old, but...

    https://futurism.com/nasa-insight-lander-first-marsquake
     
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  18. AlBran

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    What are the implications of being seismically active still (loaded question)?
     
  19. eloyc

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    Well, I'm not an expert, but I guess it can help determine if there's still some tectonic or volcanic activity, and how alive the core of the planet is, rather than just dead rock.
     
  20. AlBran

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    Can we send a team of expert drillers to nuke the core to jumpstart it? :p
     
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