№11 ноябрь 2024
Портал функционирует при финансовой поддержке Министерства цифрового развития, связи и массовых коммуникаций.
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14.11.2014 21:11:48
[QUOTE]Meshulam пишет:
Модуль "Филы" после того как закрепился на поверхности кометы Чурюмова-Герасименко "запел". "Песня" была записана в диапазоне недоступном человеческому уху и позже усилена в 10 тысяч раз.[/QUOTE] Не модуль "Филы" запел, "поёт" сама комета. "Песня звучит" в виде осцилляций магнитного поля в кометной среде, через которую "дует" солнечный ветер. Песня была замечена еще в августе, когда "Розетта" находилась в 100км от кометы. [QUOTE]But one observation has taken the RPC scientists somewhat by surprise. The comet seems to be emitting a ‘song’ in the form of oscillations in the magnetic field in the comet’s environment. It is being sung at 40-50 millihertz, far below human hearing, which typically picks up sound between 20 Hz and 20 kHz. To make the music audible to the human ear, the frequencies have been increased by a factor of about 10,000. The music was heard clearly by the magnetometer experiment (RPC-Mag) for the first time in August, when Rosetta drew to within 100 km of 67P/C-G. [/QUOTE] |
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12.11.2014 18:02:12
[QUOTE]12 November 2014
The Philae lander has separated from the Rosetta orbiter, and is now on its way to becoming the first spacecraft to touch down on a comet. Separation was confirmed at ESA’s Space Operation Centre, ESOC, in Darmstadt, Germany at 09:03 GMT / 10:03 CET. It takes the radio signals from the transmitter on Rosetta 28 minutes and 20 seconds to reach Earth, so separation actually occurred in space at 08:35 GMT / 09:35 CET. The first signal from Philae is expected in around two hours, when the lander establishes a communication link with Rosetta. Philae cannot send its data to Earth directly – it must do it via Rosetta. What does Philae do during descent? Once the link has been established, the lander will relay via Rosetta a status report of its health, along with the first science data. This will include images taken of the orbiter shortly after separation. The descent to the surface of Comet 67P/Churyumov–Gerasimenko will take around seven hours, during which the lander will take measurements of the environment around the comet. It will also take images of the final moments of descent. Confirmation of a successful touchdown is expected in a one-hour window centred on 16:02 GMT / 17:02 CET. The first image from the surface is expected some two hours later.[/QUOTE] Follow the event live via www.esa.int/rosetta |
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