The Conversation (Global)
중도 성향
기타
South African telescope detects record-breaking signal from the early universe
Scientists have discovered the most distant hydroxyl megamaser ever detected. This is a natural space laser.
"TELESCOPE" · 총 12건
필터 보기현재 지수
50.3
0 = 부정 우세
50 = 중립
100 = 긍정 우세
최근 7일 기준 87,516건을 분석한 결과, 뉴스 심리지수는 50.2(균형)입니다. 긍정 4,487건(5.1%)·중립 80,844건(92.4%)·부정 2,185건(2.5%)이며, 중립 비중이 뚜렷하게 높습니다. 성향 지수는 종합 15.3(중도 균형)입니다.
Scientists have discovered the most distant hydroxyl megamaser ever detected. This is a natural space laser.
Scientists study small galaxies to look for hints of dark matter in the universe.
This week will offer one of the great opportunities in June to take in a special celestial event – a Venus-Jupiter planetary conjunction.
Construction on the Tibetan plateau of some of the Earth’s most powerful optical telescopes is putting China on track to house the world’s biggest astronomy base by the mid-2030s, according to project scientists. Deng Licai, lead scientist for site planning at the National Astronomical Observatories of China (NAOC) in Beijing, said the telescopes at Saishiteng Mountain in northwestern Qinghai province would stretch between 6.5 metres (21.3 feet) and 14.5 metres across, and partner with dozens of...
The group leading the charge in the search for extraterrestrial life has given the all-clear: an interstellar comet looks to be completely natural and free of any alien tech. The SETI Institute said Wednesday that extensive radio scans by its telescope in Northern California found no signs of otherworldly technology from our solar system’s latest interstellar visitor. The object labelled 3I/ATLAS was discovered last summer sweeping through our neck of the cosmic woods. Scientists quickly...
The SETI Institute said Wednesday that extensive radio scans by its telescope in Northern California found no signs of otherworldly technology from our solar system's latest interstellar visitor.
The best map yet of cosmic magnetic fields has been created with Australia’s most powerful radio telescope.
NASA’s next great space telescope will see 100 times more sky than Hubble. It’s about to arrive in Florida for launch in September.
Telescópio Hubble cruza céu de Itapetininga (SP) nesta quinta-feira (28) Rodrigo Raffa A segunda passagem do telescópio Hubble foi registrada na noite desta quinta-feira (28) pelo professor de física Rodrigo Raffa, em Itapetininga (SP). Raffa, que também é responsável pelo Centauri, Clube de Astronomia de Itapetininga, conseguiu fotografar o objeto às 18h34, a partir da unidade do Sesi. O registro foi feito com uma lente Canon 50mm f/1.8, tempo de exposição de quatro segundos e ISO 400. 📲 Participe do canal do g1 Itapetininga e Região no WhatsApp "Apesar do forte brilho da Lua nas proximidades, o Hubble apareceu brilhante no céu, sendo possível acompanhar sua trajetória a olho nu. Um daqueles momentos raros em que ciência, observação e paciência se encontram no céu", relatou o professor. Segundo Rodrigo, ele estava dando aula pouco antes do horário previsto para a passagem do Hubble Space Telescope e convidou os alunos para irem até a área externa na tentativa de visualizar o telescópio. "Dei uma pausa na aula, chamei os alunos pra fora e vimos juntos." Quem não conseguiu acompanhar a passagem nesta quinta-feira (28) terá uma nova oportunidade nesta sexta-feira (29), entre 17h59 e 18h07. Para observar o Hubble, é necessário procurar um local com o céu aberto e começar a observação alguns minutos antes do horário previsto. O telescópio deverá surgir na região sudoeste do céu e seguir em direção ao nordeste. “O melhor momento ocorre poucos minutos após o pôr do sol, quando o observador já está no escuro, mas o Hubble ainda recebe iluminação solar em altitude. A observação de satélites como o Hubble não é exatamente rara, mas depende de uma combinação muito específica entre posição orbital, iluminação solar e horário local”, aponta o especialista. Apesar de órbitar a Terra há aproximadamente 540 km de altura, o objeto pode ser observado sem o uso de telescópio. O Hubble, telescópio espacial, cruza o céu da região de Itapetininga entre a quarta (27) e sexta (29) Arquivo pessoal/Rodrigo Raffa Hubble é um observatório espacial lançado em 1990 pela Nasa em parceria com a Agência Espacial Europeia. O brilhante objeto viaja a cerca de 28 mil km/h no céu e completa uma volta ao redor do planeta em aproximadamente 95 minutos. Rodrigo diz que além da importância científica histórica do Hubble, sendo responsável por registrar imagens do universo e descobertas da expansão cósmica, ele também impacta de forma simbólica a observação do céu. “Muitas pessoas conseguem literalmente enxergar no céu um dos instrumentos científicos mais importantes já construídos pela humanidade. Vão ser três dias incríveis cortando os céus da região”, aponta. Initial plugin text Veja mais notícias no g1 Itapetininga e Região VÍDEOS: assista às reportagens da TV TEM
Russian cosmonauts Sergey Kud-Sverchkov and Sergey Mikaev will install a radiotelescope on the surface of the Zvezda module as part of the Solntse-Teraherz experiment
This sponsored article is brought to you by Master Bond. Outgassing is the release of volatile substances from a cured adhesive over time. These released materials, which may include residual solvents, unreacted monomers, or other chemical species, can deposit on nearby surfaces, causing contamination that interferes with sensitive components. What Is Outgassing and How Is It Measured? The industry standard for measuring outgassing is ASTM E595, developed by NASA. This test exposes a cured sample to 125 °C at high vacuum (10⁻⁵ to 10⁻⁶ torr) for 24 hours, measuring Total Mass Loss (TML) and Collected Volatile Condensable Materials (CVCM). To meet NASA low outgassing requirements, materials must exhibit less than 1 percent TML and less than 0.1 percent CVCM. Optical assemblies need contamination-free bonding and prevention of fogging the optics to maintain clarity. High-vacuum scientific equipment, semiconductor manufacturing tools, and aerospace electronics also demand low outgassing materials. Key Applications Low outgassing adhesives are essential wherever contamination could compromise performance and this is particularly relevant for space and satellite systems. Optical assemblies, including cameras, telescopes, and laser systems, need contamination-free bonding and prevention of fogging the optics to maintain clarity. High-vacuum scientific equipment, semiconductor manufacturing tools, and aerospace electronics also demand low outgassing materials. Even terrestrial optical devices benefit from reduced outgassing to ensure long-term reliability. EP30-2 is a versatile system can be used in a variety of applications in aerospace, electronic, optical and specialty OEM industries, especially when optical clarity and low outgassing are important criteria.Master Bond Ensuring Low Outgassing Performance Through Proper Handling Achieving specified outgassing performance requires attention to storage, mixing, and curing. For two-part systems, use the correct mix ratio and mix thoroughly to ensure complete reaction. Follow recommended cure schedules — adding heat, even at modest temperatures of 150-200 °F, significantly improves cross-linking and reduces outgassing. For UV-curable adhesives, ensure complete cure by using the correct lamp wavelength (typically 365 nm), adequate intensity, and proper exposure time with no shadowed areas. Troubleshooting Outgassing Issues If contamination appears on optical surfaces or outgassing test results are higher than expected, an incomplete cure might be one of the root causes. The first step is to verify that the adhesive has fully hardened to its specified Shore hardness. The next step is to consider adding or extending heat cure to improve cross-linking. Master Bond Product Recommendations Master Bond offers a range of adhesives meeting NASA low outgassing requirements. EP30-2 and EP21TCHT-1 are some examples of two-part epoxy systems that have been successfully deployed in demanding vacuum applications, including ultra-high vacuum environments. For applications requiring UV cure, Master Bond provides specialty UV formulations such as UV16 meeting ASTM E595, as well as dual-cure systems (UV plus heat) such as UV22DC80-10F for assemblies where shadows prevent complete UV exposure. These dual-cure products initiate with UV light and complete curing with heat as low as 180 °F (80 °C).
A £1,200 space telescope, a designer bread bin worth £60 and two toilet seats, costing nearly £70, are among the items that former SNP chief executive Peter Murrell bought using money embezzled from the party.