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  1. #2951
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    Quote Originally Posted by Edmond View Post
    ^ What's your take on the the lost cosmonauts, TO?
    Not a matter I am much interested in. I think we would have heard about it. The Russians announced flights not in advance but after successful launch. So we may never hear about failures during launch. We do know about Cosmonauts dying on reentry when the capsule lost air. Since then Russian and US Astronauts wear board suits during critical mission phases.

    But we knew about the N-1 failures on the pad. US space surveillance would have picked up and we would know. So I believe it is mostly rumors. There were russian zond missions in preparation for manned moon missions. Crew capsules that failed but they were unmanned for all we know.
    "don't attribute to malice what can be adequately explained by incompetence"

  2. #2952
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    Quote Originally Posted by Takeovers View Post
    The 1996 collision between the French Cerise military reconnaissance satellite and debris from an Ariane rocket.
    The 2009 collision between the Iridium 33 communications satellite and the derelict Russian Kosmos 2251 spacecraft, which resulted in the destruction of both satellites.
    The 22 January 2013 collision between debris from Fengyun FY-1C satellite and the Russian BLITS nano-satellite.
    The 22 May 2013 collision between two CubeSats, Ecuador's NEE-01 Pegaso and Argentina's CubeBug-1, and the particles of a debris cloud around a Tsyklon-3 upper stage (SCN 15890)[1] left over from the launch of Kosmos 1666.

    One of those was a real satellite to satellite collision.

    The 2009 collision between the Iridium 33 communications satellite and the derelict Russian Kosmos 2251 spacecraft, which resulted in the destruction of both satellites.

    Satellite collision - Wikipedia

    Fortunately they are rare. Satellites are getting more. But satellite tracking and collision avoidance is also getting better.

    Much worse is space debris by not deorbited dead satellites and upper stages that are not properly passivised and explode later. Notorious are old US spy sats and ULA upper stages. But russian upper stages too. They use many of them. Reason is usually not properly terminated batteries, sometimes residual propellant that should have been vented.
    I had no idea. Sounds like space isn't so safe after all, or simple.
    To avoid further accidents, would all of the different entities sending items into orbit need to coordinate somehow, sharing orbit info so that each can ensure that no orbits cross at the same time. I can't even imagine the nightmare of trying to piece together such logistics.
    But more importantly, having a fail-safe plan for disposing of satellites at the end of their lives is essential.

  3. #2953
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    Quote Originally Posted by TTraveler View Post
    To avoid further accidents, would all of the different entities sending items into orbit need to coordinate somehow, sharing orbit info so that each can ensure that no orbits cross at the same time. I can't even imagine the nightmare of trying to piece together such logistics.
    That would not be very helpful, unfortunately. The trajectory of dead objects does change slowly over time. Lower ones by traces of atmosphere that irregularly brakes them. Even the ISS at over 400km altitude needs frequent boosts so that it does not decay. This effect is present to almost 1000km altitude. Satellites up there slowly decay over decades. Above 1000 km it takes hundreds or thousands of years. But up there and higher the orbit is influenced by the sun and Moon, so also not stable without any active steering.

    Fortunately the US Airforce, now Spaceforce, tracks all dead satellites and stages and even thousands of debris pieces with radar and makes the data available so that satellite operators worldwide can do avoidance maneuvers when there is a threat of collision. The ISS does it sometimes. The german DLR is presently building a similar facility.

    Satellite operators are ridiculously irresponsible. Especially in the important geostationary orbit, where all the TV sats are located. Operators are supposed to move their satellites to a higher orbit at the end of their life to keep that orbit clean. Instead they operate their sats way longer than their nominal life time until they drop dead in their location and are a threat to all operational satellites. A criminal behaviour.

  4. #2954
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    And sometimes people do really idiotic, selfish and irresponsible things, like the way the Chinese blew up their satellite, spraying pieces everywhere.

  5. #2955
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    Quote Originally Posted by Latindancer View Post
    And sometimes people do really idiotic, selfish and irresponsible things, like the way the Chinese blew up their satellite, spraying pieces everywhere.

    The US has done the same, to test and demonstrate their anti sat capabilities. Just a lot earlier.

    ASM-135 ASAT - Wikipedia

    NASA learned of U.S. Air Force plans for the Solwind ASAT test in July 1985. NASA modeled the effects of the test. This model determined that debris produced would still be in orbit in the 1990s. It would force NASA to enhance debris shielding for its planned space station.
    Even earlier the US used a system with a nuclear warhead because they were not yet capable of direct hits. This is when they learned about EMP. The test did a lot of damage.

  6. #2956
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    Quote Originally Posted by TheRealKW View Post
    China Launches Moon Mission to Bring Back Lunar Rocks

    The chinese lunar lander has separated from the orbiter and has reached a transfer orbit that indicates it will land at 10:13 PM Bangkok time today.

    https://twitter.com/rhZhao/status/1333242777971216384

    Tweet with a gif of lander separation.

  7. #2957
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    There is a live stream for the lunar landing.


  8. #2958
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    has something gone wrong?

  9. #2959
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    Quote Originally Posted by TheRealKW View Post
    has something gone wrong?
    I think the Australians shot it down.......

  10. #2960
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    Live stream has stopped. But CCTV 13 reports successful landing.

  11. #2961
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    Don't tell me they fucked it up. Hoohoo will be sobbing into his chow mein.

  12. #2962
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    Quote Originally Posted by Takeovers View Post
    Live stream has stopped. But CCTV 13 reports successful landing.
    If it's splattered all over the lunar surface there will be pictures of it soon enough.


  13. #2963
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    We will see. Remember that Israel and India both had failed landings. But for both it was a first. China has successfully landed 2 landers in recent years. Still, there is always a risk of failure.

  14. #2964
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    嫦娥五号探测器实施动力下降并成功着陆 将在预选区域开展月面采样工作-新华网

    Web translation:


    The Chang'e-5 spacecraft will carry out the lunar surface sampling in the pre-selected area after the power descent and successful landing


    Xinhua News Agency, Beijing, December 1 (Reporter Hu Zhe). The reporter learned from the National Space Administration that at 23:11 on December 1 the Chang'e-5 probe successfully landed on the front side of the moon in the pre-selected landing zone at 51.8 degrees West longitude and 43.1 degrees North latitude and returned the landing images.


    At 22:57 on December 1, the lander and ascender combination of the Chang'e-5 probe began a power descent from a distance of 15 kilometers from the lunar surface. The 7,500 N variable thrust engine was turned on to gradually reduce the probe's longitudinal velocity relative to the moon from about 1.7 km/s dropped to zero.


    During the period, the probe made rapid attitude adjustments and gradually approached the moon surface; after that, automatic obstacle detection was carried out. After the landing point was selected, it began to avoid obstacles and descend slowly and vertically, and landed smoothly on the north of the Mons Rümker in the Storm Ocean on the front side of the moon. During the landing, the landing camera equipped with the lander took an images of the landing area.


    After a successful landing, under control from Earth, the lander has carried out the state inspection and setup work such as the deployment of the solar panel and the directional antenna, and will officially start the lunar surface work lasting about 2 days to collect lunar samples.
    I hope we will get photos of the landing site by the lander soon.

  15. #2965
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    The lading sequence until after touch down.

    Last edited by Takeovers; 02-12-2020 at 12:26 AM.

  16. #2966
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    The rest is all being faked in a warehouse in Shenzen.

  17. #2967
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    Was lucky enough to visit this a couple of years ago. So sad it ended this way but it has been starved of funding by Republican arseholes.

    The buildings top right are the viewing platform, education centre and gift shop.

    I have a glass 3D model of it on my office desk.

    A huge loss': Giant Puerto Rico radio telescope collapses, following damage



    '''A huge loss''': Giant Puerto Rico radio telescope collapses, following damage

  18. #2968
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    Quote Originally Posted by harrybarracuda View Post
    Was lucky enough to visit this a couple of years ago. So sad it ended this way but it has been starved of funding by Republican arseholes.

    The buildings top right are the viewing platform, education centre and gift shop.

    I have a glass 3D model of it on my office desk.


    '''A huge loss''': Giant Puerto Rico radio telescope collapses, following damage

    Bah, just a little scratch.......

    On other topics, yesterday was one of the few days each year when the ISS transmits SSTV (slow scan TV) images on the 2 metre amateur band. Reception of these images depends of course on whether the ISS has a visible pass over your location. For me in Laos, the only pass was far too low in the sky to receive any images. But my receiving system did manage to receive some signals from the ISS, which bodes well for reception of future images perhaps next year.

    Finally, since I have time on my hands, I spent yesterday building a horn antenna that I plan to use to receive 'hydrogen line' signals on 1420 MHz (hydrogen atoms from stars release a small amount of energy as they flip, and this can be received with suitable equipment). The 1420 MHz frequency is slightly different for hotter stars, and differs in the opposite direction for colder stars. By pointing the antenna at specific stars, one can obtain a map the galaxy.

    Space News thread-128666931_182448116862179_2423833576764583617_n-jpg
    Groping women when you're old is fine - everyone thinks you're senile

  19. #2969
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    A typically bad video:


  20. #2970
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    Quote Originally Posted by OhOh View Post
    A typically bad video:
    Hey dont be bad mouthing Chinastani. Damn boy that is sacrilegious. You should know better.

  21. #2971
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    Quote Originally Posted by OhOh View Post
    A typically bad video:


    Nah that's unplayed video from the last mission, they just dug it out of the archives.

  22. #2972
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    Quote Originally Posted by aging one View Post
    You should know better.
    Uncle Xi and I have similar reactions to poor performance.

  23. #2973
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    Quote Originally Posted by OhOh View Post
    Uncle Xi and I have similar reactions to poor performance.
    Viagra?

  24. #2974
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    Quote Originally Posted by Topper View Post
    Viagra?
    Uncle Xi keeps his medical history to himself. As many do.

  25. #2975
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    China's Chang'e-5 completes sampling on moon

    Source: Xinhua| 2020-12-03 1144|Editor: huaxia



    China's Chang'e-5 completes sampling on moon - Xinhua | English.news.cn

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