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From: TerryMoselaol.com Date: Sat, 4 Feb 2006 16:36:53 EST Subject: Sputnik 1, Lectures, TV, Birmingham Planetarium Hi all, (1.) Well! A very interesting set of replies about the visibility of Sputnik 1! Thanks to all who did so. Here are exerpts: 1. From Peter Paice, Belfast: "Hi Terry, Margaret & I saw the pass of Sputnik 1 from the back windows of our first flat in Belfast. Our eyes were about 25yrs. old!" 2. From Alan Fox: "I saw Sputnik 2 - at least I saw a faint moving object going across the sky at the time and in, roughly, the place the media had said to look. I did not try to see Sputnik 1 (not sure I knew about 'til after the event) - so no help there. But Sputnik 2 was consistent with the item seen." 3. From Dr Brendan McWilliams, Met Office, Dublin: "Incidentally, I remember very clearly seeing Sputnik1. I was 13 at the time living with my grandparents in Caherciveen Co Kerry, and my grandfather and I got up at about 5 in the morning and walked a mile or so outside the town for the predicted time. It appeared right on schedule, and I seem to recall also that it moved rather more rapidly [than the ISS] (perhaps 50 per cent faster) across the sky. Again if my memory is correct, it moved from NE to SW, with maximum elevation in the NW at about 45 degrees or somewhat more. I can't be sure of all the details, or course, but I am quite sure about seeing Sputnik." 4. From Dr Ian Elliott, ex-Dunsink Observatory: " Re Sputnik 1, I think I remember observing a satellite with the naked eye in October 1957, though I thought I had to get up early to see it. The Dublin evening papers used to print predictions. I searched my collection of pocket diaries but found that they go back only to 1959! Cheers, Ian" 5. From Denis O'Mahony, Shannonside Ast Club. "Just got your email and I can confirm that I too saw the moving speck that was Sputnik with my late father in South Co. Wexford in October 1957. Like you, as a 10 year old, I had little scientific or observational skills, but my father had read in the newspaper earlier that day the predicted track in the twilight sky. I forget the exact date, but the sky was clear and the moving, starlike object was unmistakable against the deep turquoise of the fading light near the zenith. Like you the event is like a movie sequence in my memory and my father's great excitement on wittnessing that little spark of moving light made me realise just how momentous the occasion was. Thanks again for your regular missives. Keep up the good work!" So it seems that some of us did actually see something, as and where predicted, in October 1957, the date of the Sputnik 1 launch. And of course at that time there was only one artificial satellite! But what did we see? The final word must go to the redoubtable authority of Leo Enright.... 6. "Hi Terry: Sputnik 1 was not visible from the ground (it was a 580 mm sphere with a mass of only 83 kg ). However, the booster rocket would have been hard to miss (28.00 meters long, 3 meters across and weighing 7.5 tonnes empty). What shocked the West was that the Russians orbited a total of more than 7.5 tonnes, compared to just 5 kg. for Explorer 1 and its little rocket motor! It was this vast "missile gap" that Kennedy exploited during the 1960 election campaign. The Americans' puny rockets also led directly to the revolution in electronic miniaturisation. Leo" So Brian Beesley, my original correspondent, seems to have been right - it was almost certainly the final stage rocket, rather than the satellite itself. But maybe the media predictions didn't make that clear. In any case, we did see part of the Sputnik 1 launch hardware in orbit, as predicted. And it was an unforgettable, iconic, moment - the first man-made object launched into space: the Dawn of the Space Age. And since then, in under 49 years? Men on the Moon; the ISS, civilians in space, probes to all the planets except Pluto, with one on the way there now; rovers on Mars; soft landers on Venus, Titan, an asteroid, and a comet; probes effectively leaving the Solar System altogether; the HST; thousands of satellites in orbit; amazing scientific satellites studying the Earth, other planets and deep space; Satellite TV; and GPS which can tell you your location anywhere on Earth within about 5 metres....! I hope there will be appropriate celebrations to mark the 50th anniversary in October 2007! REMINDERS: (2.) Prof Alan Fitzsimmons of QUB will give a lecture to the EAAS in Thompson Primary School, Ballyrobert on Monday 6 February. Entitled, "Deep Impact, the Story So Far", it will begin at 8.0. Admission ё3. (3.) The next IAA public lecture will be on Wed 8 February, 7.30 p.m., Lecture theatre 5, Stranmillis College, Stranmillis Road, Belfast. It will be given by Dr Neill Trappe, of NUI Maynooth, and is entitled "Far Infrared Space Optics". All welcome; admission free, including light refreshments. (4.) TV: The Sky At Night: "On Top of the World - Observatories on Hawaii" Sunday 5 Feb. 1am.- 1.45am. BBC 1 Monday 6 Feb. 7pm. - 8pm. BBC4 (extra 15mins) Sunday 12 Feb. BBC 2 repeat of previous Sunday's prog. (5.) Birmingham Planetarium. Following my lament about the demise of London Planetarium, I got this piece of brighter news from Mario di Maggio, whom some of you may remember from his days at Armagh, and then Glasgow, Planetaria: "Sad about London Planetarium Terry, we agree. But at least Birmingham now has a fabulous planetarium (the UK's first purpose-built digital planetarium) with three full-time astronomers on the team! Although only a 70-seater / 10 m dome, in our first 40 days of opening we have received 6500 visitors! :-)) And we're planning an exciting programme for the future, everything from multi-cultural astronomy shows, evening music entertainment and loads of other innovative stuff. Some press coverage can be seen here: www.dimaggio.org/Thinktank/media.htm Mario." So if you're ever in the Birmingham area, it sounds as if it's worth a visit. Clear Skies, Terry Moseley
Last Revised: 2006 February 6th
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