NASA astronaut photographs SpaceX's private Polaris Dawn capsule reentry from ISS (photo)

NASA astronaut photographs SpaceX's Polaris Dawn reentry | The Harvest Moon Supermoon lunar eclipse is tonight! | Auroras galore! Geomagnetic storm sparks aurora across US Created for znamenski.spacecom@blogger.com |  Web Version September 17, 2024 CONNECT WITH SPACE.COM       Something amazing every day. SIGN UP ⋅   WEBSITE   The Launchpad NASA astronaut photographs SpaceX's Polaris Dawn reentry (NASA / Don Pettit) An epic picture of Polaris Dawn's nighttime reentry has been beamed to Earth from space. NASA astronaut Don Pettit caught the conclusion of Polaris Dawn, a private space mission that included the first-ever commercial spacewalk, during its SpaceX Dragon spacecraft's return to Earth before dawn on Sunday (Sept. 15). "In addition to the multi-colored entry trail over Florida, the basic cone shape of the Dragon capsule can be seen," Pettit wrote on X, formerly Twitter, Sunday afternoon about his picture taken from the International Space Station (ISS). Full Story: Space (9/16)  The Harvest Moon Supermoon lunar eclipse is tonight! (Starry Night Software) September's full moon will put on quite the show on the evening of Sept. 17. Not only are we treated to a slightly larger-than-average "supermoon" but also a partial lunar eclipse. Full Story: Space (9/17)  Skywatching Auroras galore! Geomagnetic storm sparks aurora across US (Hasan Akbas/Anadolu via Getty Images) Rolling in about 6 hours later than predicted, a huge plume of plasma and magnetic field from the sun, known as a coronal mass ejection (CME) slammed into Earth, triggering a severe geomagnetic storm. The CME hit around 7:41 p.m. EDT (2341 GMT) on Sept. 16, triggering a dazzling northern lights display visible as far south as the Texas Panhandle. Full Story: Space (9/17)  Spaceflight China prepares for 1st launch of new Long March 8A rocket (CCTV) China completed a launch site rehearsal for a new, improved rocket this month. Teams at the new Hainan commercial space launch site conducted tests with the first Long March 8A rocket including integration with the launch pad and fueling. The new launcher is now set to fly for the first time around December. Full Story: Space (9/16)  Science & Astronomy JWST witnesses a black hole 'killing' its galaxy (photo) (Francesco D'Eugenio) Using the James Webb Space Telescope (JWST), astronomers have observed a supermassive black hole in the early universe that is killing its galaxy by starving it to death. Remarkably, this "galactic death by starvation" seems to have proceeded very quickly thanks to the creation of 2 million miles per hour winds of gas. Full Story: Space (9/16)  Search for Life Scientists spot ancient 'smiley face' on Mars (ESA/TGO/CaSSIS) Astronomers recently spotted a surprising "smiley face" beaming up from the surface of Mars as they surveyed the alien landscape as part of a new study. The emoticon-like structure, which is only visible under certain conditions, is the remnant of an ancient lake that dried up billions of years ago - and could be harboring signs of former life on the Red Planet. Full Story: Space (9/17)  Star Wars 'Star Trek: Lore War' will bring back Data's evil brother (IDW) In a reality-warping cosmic event two years in the making, IDW Publishing is celebrating all the creative foundational work after relaunching its award-winning "Star Trek" comics with the Eisner-nominated "Star Trek #400" to present an epic new crossover project next year, "Star Trek: Lore War." Hailing from top-tier creators Collin Kelly, Jackson Lanzing, Christopher Cantwell, and illustrator Davide Tinto, this intertwined sci-fi tale arriving in March of 2025 will carry over into the prime "Star Trek" ongoing series, "Star Trek: Defiant," and several special one-shot tie-in issues to be announced later. Full Story: Space (9/16)    Sign Up  |    Update Profile  |    Unsubscribe Privacy Policy  |    Cookies Policy  |    Terms and Conditions CONTACT US: FEEDBACK  |    ADVERTISE Future US LLC © Full 7th Floor, 130 West 42nd Street, New York, NY, 10036

Seminars Digest, Vol 67, Issue 4

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Today's Topics:

1. Friday 20.09.2024 (info+seminars@itp.ac.ru)

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Message: 1
Date: Tue, 17 Sep 2024 10:02:01 +0300
From: info+seminars@itp.ac.ru
To: staff@itp.ac.ru, students@itp.ac.ru, seminars@itp.ac.ru
Subject: [Landau ITP Seminars] Friday 20.09.2024
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Уважаемые коллеги!

На заседании Ученого совета ИТФ в пятницу 20.09 в 11:30 будут заслушаны 2 доклада:

1). Сергей Г. Тиходеев (МГУ и ИОФ им. А.М. Прохорова РАН)
Поляритонная мультистабильность в хиральном полупроводниковом микрорезонаторе

Фотонные резонансы в хиральных структурах приводят к большому количеству интересных эффектов. Например, изготовление хирального фотонного кристалла на верхнем зеркале полупроводникового микрорезонатора может привести к тому, что его экситонная фотолюминесценция, как в спонтанном, так и в лазерном режиме, может стать циркулярно-поляризованной [1,2]. С другой стороны, нелинейность экситонного отклика при увеличении интенсивности оптической накачки приводит к эффектам би- и мультистабильности [3-5]. В докладе будет проанализирована мультистабильность отклика экситон-поляритонов в хиральном полупроводниковом микрорезонаторе. Будет показано, например, что даже при линейно-поляризованной накачке и малой степени циркулярной поляризации фотолюминесценции в спонтанном режиме, с ростом интенсивности накачки в таких системах возможны резкие мультистабильные переходы в состояния с высокой степенью циркулярной поляризации фотолюминесценции.

Литература
1. A.A. Demenev, V.D. Kulakovskii,_C. Schneider et al. // Appl. Phys. Lett. 2016. V. 109. P. 171106.
2. A.A. Maksimov, E.V. Filatov, I. I. Tartakovskii et al. // Phys. Rev. Appl. 2022. V. 17, P. L021001.
3. N. A. Gippius, S. G. Tikhodeev, V. D. Kulakovskii et al. // Europhys.Lett. 2004. V. 67. P. 997.
4. N.A. Gippius, I. A. Shelykh, D. D. Solnyshkov et al. // Phys. Rev. Lett. 2007. V. 98. P. 236401.
5. С.С. Гаврилов // УФН 2020. Т. 190 137.

ID и пароль онлайн-трансляций в Zoom те же, что и для предыдущих трансляций семинаров и докладов на Ученом совете:
https://zoom.us/j/96899364518?pwd=MzBsR2lYT0lYL2x2b1oyNU9LeWlWUT09
Meeting ID: 968 9936 4518
Пароль: 250319

При числе желающих не менее 5 будет организован автобус.
Для записи на автобус из Москвы в Черноголовку необходимо до 18:00 четверга отправить письмо на адрес электронной почты bus@itp.ac.ru
После этого записавшимся до 20:00 поступит подтверждение об отправке или неотправке автобуса в зависимости от числа записавшихся.
Запись на обратный автобус - на Ученом совете.

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