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Viewing 15 posts - 1 through 15 (of 594 total)
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  • in reply to: M81/82 #18731

    Andy Sawers
    Moderator
    Topics: 124
    Replies: 602

    Thomas, that’s a great photo. Apologies for my delay in noticing you’d posted it.

     

    You should send it into flamsteed@rmg.co.uk for inclusion in our monthly video.

    in reply to: Romney Observing in Dember 2018 #18729

    Andy Sawers
    Moderator
    Topics: 124
    Replies: 602

    Hi and thanks for your post. Unfortunately it is unlikely to be possible to take friends to Romney. Our Blackheath events take place outdoors so there is plenty of space – and we are in a public area as well. We would be very happy to meet you and your friends there

    Our Romney viewings are in the observatory of one of our members who very generously makes his facility available to us. Space is very restricted and the events are few in number and very popular, so we do have to limit attendance to Flamsteed members.

    However, if you email us at flamsteed@rmg.co.uk a day or two before, it’s just possible that there might be places that haven’t been taken up by members.

    Sorry I can’t give you a more positive answer!

    in reply to: 'Invention that Will Change Astronomy' #18209

    Andy Sawers
    Moderator
    Topics: 124
    Replies: 602

    Many thanks, Richard, I will indeed pass this on!

    in reply to: 'Invention that Will Change Astronomy' #18051

    Andy Sawers
    Moderator
    Topics: 124
    Replies: 602

    Success!!! Richard, I’ve received the following reply from Tom Kerss, one of the astronomers at the Observatory and an expert astrophotographer…..

     

    I read about this in a book published in the 80s called ‘History of Astronomy Technology’ or something. I’m afraid it was almost 10 years ago that I stumbled on it, but yes it does appear that the first Active Optics system was invented in the UK and piloted at RGO. Sadly this is a very poorly told story, so I’m glad you are trying to bring it to light!

    I would suggest getting in touch with Gerry Gilmore at IoA to see if he can illuminate the details: https://www.ast.cam.ac.uk/~gil/

    Gerry is a true legend in this area, and has been involved in the development of the most accurate optical systems ever created (notably Gaia’s interferometry bench and the VLT/E-ELT)

    By the way, the last paragraph in the article is quite prophetic. Early Active Optics system worked by moving a small optical window near focus. Since then the design has evolved into what we would now call Adaptive Optics, and it is indeed used all over the world by the most powerful ground-based telescopes!

    Clear skies,

    Tom Kerss
    P.S. Say hello to Gerry from all of us at the ROG!

    • This reply was modified 6 months, 1 week ago by  Andy Sawers.
    • This reply was modified 6 months, 1 week ago by  Andy Sawers.
    in reply to: 'Invention that Will Change Astronomy' #18048

    Andy Sawers
    Moderator
    Topics: 124
    Replies: 602

    Fingers crossed!

    in reply to: 'Invention that Will Change Astronomy' #18046

    Andy Sawers
    Moderator
    Topics: 124
    Replies: 602

    That’s fascinating, Richard! Thank you so much for posting this.

    There are a couple of people at the Observatory that I will email in the hope that they can point you in the right direction.

    Good luck with your book!

    Andy Sawers

    Chair, Flamsteed Astronomy Society

    in reply to: Rainbows and other sky phenomena #17345

    Andy Sawers
    Moderator
    Topics: 124
    Replies: 602

    Rainbows and gold.

    xkcd

    • This reply was modified 9 months, 3 weeks ago by  Andy Sawers.
    in reply to: I speak Astronomy #17217

    Andy Sawers
    Moderator
    Topics: 124
    Replies: 602
    in reply to: I speak Astronomy #17160

    Andy Sawers
    Moderator
    Topics: 124
    Replies: 602

    Should we get them signed up for our Christmas party?

    in reply to: Monument: The Secret Lab and Telescope #17106

    Andy Sawers
    Moderator
    Topics: 124
    Replies: 602

    Amazing!!! Great work, Miss Marple!

    in reply to: Light pollution and Spain #16940

    Andy Sawers
    Moderator
    Topics: 124
    Replies: 602

     

    in reply to: The Medicean movie #16932

    Andy Sawers
    Moderator
    Topics: 124
    Replies: 602

    The photograph in this tweet is extraordinary. Look carefully…

    Cynthiae figuras aemulatur mater amorum” = “The mother of love (Venus) imitates the form of Cynthia (the Moon)” – Galileo

    in reply to: The Medicean movie #16930

    Andy Sawers
    Moderator
    Topics: 124
    Replies: 602

    Thank you, Bill! It was really fun to prepare the talk and I was delighted it seemed to go down so well.

    in reply to: Adding music to timelapse #16746

    Andy Sawers
    Moderator
    Topics: 124
    Replies: 602

    I make the monthly video using the Movie Maker Windows app (free and built into the operating system). It’s not an elegant system, but pretty straightforward when you get the hang of it.

    Finding free-to-use royalty-free music is a bit tricky. Googling helps but you do have to be careful about what sites you click onto. Some can be dodgy. Our first videos used a website called MelodyLoops but while that’s royalty-free, it’s not free to use. There’s a one-off payment per piece of music, I think.

    I’ve used yourclassical.org and incompetech.com – but be careful you click on website buttons and not on advert buttons! Licensing under ‘creative commons’ (rather than buying a license) generally means free to use as long as you credit the artist/website.

    Sumitra used Jamendo.com for a Perseids timelapse she did a few years ago and that seems good.

    in reply to: JULY – Historical Astronomy Dates #16339

    Andy Sawers
    Moderator
    Topics: 124
    Replies: 602

    Ah, but Galileo told people about it 😉

Viewing 15 posts - 1 through 15 (of 594 total)