哈勃太空望远镜在2020年突破性地发现几颗类星体中存在新生喷流的基础上，又发现其中一个类星体宿主星系具有意想不到的螺旋形状。 这一发现对长期以来认为类星体喷流是由星系合并引发的观点提出了挑战。 由于螺旋结构看起来完好无损，没有受到大合并的干扰，这就提出了新的问题：是什么原因导致了喷流的形成？类星体J0742+2704（中）在2020年被天文学家利用卡尔-詹斯基甚大阵列（VLA）射电天文台（Karl ...

This typically necessitates a large excitation aperture. To meet these criteria, we present a novel optical phased array (OPA) with a large emission aperture at an excitation wavelength of 532 nm. The ...

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Hubble Space TelescopeHubble HomeOverviewAbout HubbleThe History of HubbleHubble TimelineWhy Have a Telescope in Space?Hubble by the NumbersAt the ...

Track all markets on TradingView Large-cap stocks are very popular, which is evidenced by the nearly $2.4 trillion currently under management by large-cap ETFs. However, the name an ETF is ...

The night sky has always played a crucial role in navigation, from early ocean crossings to modern GPS. Besides stars, the United States Navy uses quasars as beacons. Quasars are distant galaxies with ...

Jansky Very Large Array (NSF VLA) provide compelling evidence supporting a universal mechanism for the collimation of astrophysical jets, regardless of their origin. The new study, published in ...

The best large format printers allow us to take advantage of the resolution of today's best professional digital cameras to print images up to billboard size, something that was once only possible for ...

“This will be a very significant change to the way the world works in a short period of time,” OpenAI CEO Sam Altman said at a company event in October. “People will ask an agent to do ...

Bell Potter is very positive on the BOGP project and highlights its low costs and attractive mine life. It notes: The project has a high grade Ore Reserve of 1.2Moz @ 2.4g/t Au and is emerging as ...

“The UK is making a very big mistake. Open Up the North Sea. Get rid of Windmills!” Trump wrote on Truth Social early Friday. The post linked to a November report that US oil firm Apache plans ...