Our extremely deep survey for extragalactic HI (HIDEEP) finds no intergalactic gas clouds, and no galaxies with HI at inferred global column-densities below 10^20 cm^-2 when we could have detected such objects down to a completeness limit of 4 x 10...
We present an extended ultraviolet-blue (850-4700 AA) library of theoretical stellar spectral energy distributions (SEDs) computed at high resolution, R= 50,000. The UVBLUE grid, as we named the library, is based on LTE calculations carried out wit...
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Uniformly rotating, homogeneous, incompressible Maclaurin spheroids that spin sufficiently rapidly are secularly unstable to nonaxisymmetric, bar-mode perturbations when viscosity is present. The intuitive explanation is that energy dissipation by...
We present UBV CCD observations obtained in the field of the northern open cluster NGC 1220, for which little information is available. We provide also BV CCD photometry of a field 5$^{\prime}$ northward of NGC 1220 to take into account field star...
Jul 2, 2025 · Simply put, the opposite of 'zenith' is 'nadir.' While zenith refers to the highest point, nadir indicates the lowest point—commonly used in astronomy, geography, and metaphorical contexts. …
360-degree videos are a new type of movie that renders over all 4$π$ steradian. Video sharing sites such as YouTube now allow this unique content to be shared via virtual reality (VR) goggles, hand-held smartphones/tablets, and computers. Creating 3...
We present the results from our program to determine the evolution of the galaxy interaction/merger rate with redshift using the unique star-forming characteristics of collisional ring galaxies. We have identified 25 distant collisional ring galaxy...
We report first white-light interferograms obtained with an integrated optics beam combiner on a glass plate. These results demonstrate the feasability of single-mode interferometric beam combination with integrated optics technology presented and...
Here is the link to their work: [https://www.reddit.com/r/cloudstorage/comments/1qxvnnc/just\_busted\_internxt\_for\_hiring\_an\_astroturfing/](https://www.reddit.com/r/cloudstorage/comments/1qxvnnc/j...
elimination. Mathematics and astronomy flourish during the Golden Age of India (4th to 6th centuries AD) under the Gupta Empire. Meanwhile, Greece and its colonies
We are planning to build an observatory that includes a 40 cm optical telescope at Tay Nguyen University (TNU), Daklak Province, Vietnam. In this paper, we report the initial activities of our project. First, to prepare for the scientific exploitatio...
The nature of Dark Matter (DM) is one of the most outstanding mysteries of modern astrophysics. While the standard Cold DM (CDM) model successfully explains observations on most astrophysical scales, DM particles have not yet been detected, leaving r...
The Amateur Sky Survey (TASS) is a loose confederation of amateur and professional astronomers. We describe the design and construction of our Mark III system, a set of wide-field drift-scan CCD cameras which monitor the celestial equator down to t...
Amateur astronomers can make useful contributions to the study of comets. They add temporal coverage and multi-scale observations which can aid the study of fast-changing, and large-scale comet features. We document and review the amateur observing c...
We present B, V, R, I and Z-band photometric observations of HD 209458 during the transit by its planetary companion on UT 1999 November 15 with the University of Hawaii 0.6m and 2.2m telescopes and the High Altitude Observatory STARE telescope. Th...
Images obtained with the Gemini Multi-Object Spectrograph (GMOS) are used to investigate the stellar content and distance of the dwarf irregular galaxy Kar 50. The brightest object is an HII region, and the bright stellar content is dominated by st...
Dec 13, 2024 · 这是一个不断完善的回答，理论上，发的越晚，内容越丰富。 今年是我第三次猜对TGA年度最佳。 也是我首次连续两年猜对TGA年度最佳。 作为一个游戏爱好者，在每个知名游戏大奖之 …
背景介绍 在罗技Astro A40系列游戏耳机介绍之前，首先我们简单了解一下ASTRO Gaming这个品牌。早期它主要为Alienware和Xbox等游戏设备厂商设计配件，在2006年后ASTRO把游戏业务剥离出来专 …
Astro作为前端框架，Islands架构按需加载 Workers处理API和SSR KV和D1处理不同粒度的数据存储 结果：支撑百万级MAU，首屏加载时间<1秒，月成本$5起步（其实可以0的，但是有的功能的子请求比较 …
虽然不太了解OM是在什么样的精神状态下推出这款天文机的，但这机器还是有比较有趣的地方。 奥之心 在宣传OM3A上，非常推荐用 手持超解 来拍摄星野和深空。这个功能可以连拍12帧合成为低噪点高 …
* [Bruce Lee](https://en.wikipedia.org/wiki/Bruce_Lee) (1940-1973) - An iconic actor and martial artist, who is considered the most influential martial artist of all time. He developed his own style o...
The Indian Institute of Astrophysics (IIA) is developing a Multi-Conjugate Adaptive Optics (MCAO) system for the Kodaikanal Tower Telescope (KTT). In this context, we have measured the daytime turbulence strength profile at the Kodaikanal Observatory...
We have developed two redundant daytime star cameras to provide the fine pointing solution for the balloon-borne submillimeter telescope, BLAST. The cameras are capable of providing a reconstructed pointing solution with an absolute accuracy < 5 ar...
Feb 26, 2026 · One of our universe's biggest stars has dramatically turned into a rare, yellow 'hypergiant' star, and astronomers aren't sure when it will go supernova. The observations offer a rare glimpse...
The low accretion rate inferred for the GC source Sgr A* requires a distinct type of accretion disk -- a starving disk. We investigate the structure of this type of disk within the framework of thin Keplerian disk models taking into account relativ...
The ADS All-Sky Survey (ADSASS) is an ongoing effort aimed at turning the NASA Astrophysics Data System (ADS), widely known for its unrivaled value as a literature resource for astronomers, into a data resource. The ADS is not a data repository per s...
Astrometry is one of the main science case which drives the requirements of the next multiconjugate adaptive optics (MCAO) systems for future extremely large telescopes. The small diffraction limited point-spread function (PSF) and the high Signal-to...
Astrometry was not a science case of the Gemini Multiconjugate adaptive optics System (GeMS) at its design stage. However, since GeMS has been in regular science operation with the Gemini South Adaptive Optics Imager (GSAOI), their astrometric perfor...
The IceCube realtime alert system has been operating since 2016. It provides prompt alerts on high-energy neutrino events to the astroparticle physics community. The localization regions for the incoming direction of neutrinos are published through N...
We present an analysis of weak lensing observations for RXJ1347-1145 over a 43' X 43' field taken in B and R filters on the Blanco 4m telescope at CTIO. RXJ1347-1145 is a massive cluster at redshift z=0.45. Using a population of galaxies with 20<R<...
We present an analysis of 7 clusters observed by XMM as part of our survey of 17 most X-ray luminous clusters of galaxies at z=0.2 selected for a comprehensive and unbiased study of the mass distribution in massive clusters. Using public software,...
In this paper, a review is given of methods useful for XMM-Newton EPIC data analysis of extended sources, along with some applications to a bright massive cluster of galaxies at z=0.2, Abell 209. This may constitute an introduction to that kind of...
Awarded the Frank J. Malina Astronautics Medal" (PDF). Newsletter of the International Society for the Arts, Sciences and Technology and of L'Observatoire
PRIMEtime was a 24-hour English-language pay television channel in Malaysia owned by Astro. The channel aired general entertainment programmes with content
Have you ever wondered: what is Gemini’s compatibility with other zodiac signs? Shout your love from the rooftops with energetic and outgoing Gemini. This Mutable Air sign brings the lively conversation …
Gemini has two sides. Such is the nature of the “twins,” the symbol that represents this sign. This sign has both plenty. of energy and stamina. Additionally, they’re very clever when it comes to language. …
Gemini Similar: Air Sign Symbolized by twins, this zodiac sign is known for its two-sided nature. It is the third sign in the zodiac characterized by talkativeness and playfulness. People born from May 21st to …
We study the survival of gas planets around stars with masses in the range 1-5 Msun, as these stars evolve off the Main Sequence. We show that planets with masses smaller than one Jupiter mass do not survive the Planetary Nebula phase if located in...
Astronomy, chemistry, history, linguistics, and the natural sciences are among the fields that have benefited from the activities of amateurs. Gregor Mendel was an amateur scientist who never held a …