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50,081 results on '"Telescope"'

1. CHEAT SHEET TO THE UNIVERSE: ... FROM HOW IT BEGAN TO ITS ULTIMATE FATE

Author

Sparrow, Giles

Subjects
Telescope, Astronomy
Abstract

Our universe encompasses everything around us, with countless stars, planets and galaxies stretching as far as our telescopes can see and vast expanses beyond them that lie forever out of sight. It's a big subject--the biggest of all--so join us as we break down the basics, WHAT IS THE UNIVERSE? The universe is a vast expanse of space and time filled with matter and energy. The word comes from the Latin universus, meaning 'all things', although [...]

Published
2024

2. Chasing Giant Ice Balls.

Author

RIDDLE, BOB

Subjects
HALLEY'S comet, NEOWISE comet, NEAR-Earth objects, CERES (Dwarf planet), NEWTON-Raphson method, COMETS
Abstract

This article discusses the history and significance of comets in our solar system. Comets have been observed and recorded throughout history, often being viewed as signs of good or bad times depending on the culture. The article also mentions notable comets that have gained public interest in recent years, such as Comet NEOWISE and Comet C/2022 E3 (ZTF). It introduces Comet C/2023 A3 Tsuchinshan-ATLAS, which was discovered in early 2023 and is expected to reach perihelion on September 27, 2024. The article provides tips for viewing comets and highlights the educational value of studying them. [Extracted from the article]

Published
2024
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3. Telescopic Network of Zhulong for Orbit Determination and Prediction of Space Objects.

Author

Lei, Xiangxu, Lao, Zhendi, Liu, Lei, Chen, Junyu, Wang, Luyuan, Jiang, Shuai, and Li, Min

Subjects
*CONSTELLATIONS, *ORBIT determination, *SPACE surveillance, *ORBITS (Astronomy), *OPTICAL sensors, *SPACE debris, *IMAGE sensors
Abstract

The increasing proliferation of space debris, intermittent space incidents, and the rapid emergence of massive LEO satellite constellations pose significant threats to satellites in orbit. Ground-based optical observations play a crucial role in space surveillance and space situational awareness (SSA). The Zhulong telescopic observation network stands as a pivotal resource in the realm of space object tracking and prediction. This publicly available network plays a critical role in furnishing essential data for accurately delineating and forecasting the orbit of space objects in Earth orbit. Comprising a sophisticated array of hardware components including precise telescopes, optical sensors, and image sensors, the Zhulong network synergistically collaborates to achieve unparalleled levels of precision in tracking and observing space objects. Central to the network's efficacy is its ability to extract positional information, referred to as angular data, from consecutive images. These angular data serve as the cornerstone for precise orbit determination and prediction. In this study, the CPF (Consolidated Prediction Format) orbit serves as the reference standard against which the accuracy of the angular data is evaluated. The findings reveal that the angular data error of the Zhulong network remains consistently below 3 arcseconds, attesting to its remarkable precision. Moreover, through the accumulation of angular data over time, coupled with the utilization of numerical integration and least squares methods, the Zhulong network facilitates highly accurate orbit determination and prediction for space objects. These methodologies leverage the wealth of data collected by the network to extrapolate trajectories with unprecedented accuracy, offering invaluable insights into the behavior and movement of celestial bodies. The results presented herein underscore the immense potential of electric optic telescopes in the realm of space surveillance. By harnessing the capabilities of the Zhulong network, researchers and astronomers can gain deeper insights into the dynamics of space objects, thereby advancing our understanding of the cosmos. Ultimately, the Zhulong telescopic observation network emerges as a pioneering tool in the quest to unravel the mysteries of the universe. [ABSTRACT FROM AUTHOR]

Published
2024
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4. Capturing Photons.

Author

RIDDLE, BOB

Subjects
PHOTONS, METEOR showers, OPTICAL telescopes, FOCAL length, APPLICATION software, CERES (Dwarf planet)
Abstract

The article discusses the use of smart telescopes and digital imaging technology in astronomy education. It highlights the affordability and accessibility of smart telescopes, which can be operated using computer technology and offer features such as automatic tracking of celestial objects and access to online databases. The article also mentions the challenges of teaching astronomy and suggests that introducing astrophotography can make the subject more engaging for students. It provides information on the features to consider when choosing a smart telescope and lists some smart telescopes available on the market. The article concludes by discussing the benefits of smart telescopes in collecting and analyzing data, as well as participating in citizen science projects. [Extracted from the article]

Published
2024
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5. Mike Massimino ' The greatest thing someone can do is go into space': The veteran of two Space Shuttle missions talks fixing the Hubble Space Telescope and appearing on The Big Bang Theory

Author

Lavender, Gemma

Subjects
Hubble Space Telescope (Artificial satellite), Telescope, Extravehicular activity (Manned space flight), Astronauts, Astronomy, Twitter (Online social network)
Abstract

You're a veteran of two Space Shuttle missions; could you tell us what's involved in training to go into space? As an astronaut you get trained to do all kinds [...]

Published
2024

9. Design and Analysis of Optical Telescope Subsystem

Author

Alper Şanlı and Tuncay Yunus Erkeç

Subjects
cubesat, optical subsystem, telescope, payload, reflector, Technology, Motor vehicles. Aeronautics. Astronautics, TL1-4050
Abstract

In the realm of space exploration, there is a notable upsurge in advanced remote imaging systems, particularly in CubeSats, owing to their efficiency and increasing payload capacities. These small satellites now host various mission payloads, significantly enhancing remote sensing capabilities. Optical systems, especially those with reflector optical telescope subsystems, play a pivotal role in improving CubeSat image quality, enabling high-resolution remote sensing. This study delves into the operational mechanisms of these systems, providing examples of CubeSat payloads with detailed technical insights. A key focus is the design and analysis of a reflector optical telescope payload subsystem tailored for CubeSats. Results highlight the subsystem's effectiveness, offering valuable insights into optimizing CubeSat imaging capabilities. Ground analysis further validates its real-world performance. In summary, reflector optical telescope payload subsystem was designed for CubeSats, analysis results were obtained and ground analysis was performed.

Published
2024

10. Experimental and numerical study of telescopic conical energy absorber under inversion process.

Author

Azarakhsh, Sajad, Rezvani, Mohammad Javad, and Maghsoudpour, Adel

Subjects
*PEAK load, *AXIAL loads, *ENERGY dissipation, *TUBES
Abstract

In this article, a new model of a conical absorber with an inversion mechanism in form of a telescope is introduced. The purpose of this article is to decrease the initial peak load and improve drawbacks and limitations in the inversion mechanism. When the tube is subjected to axial loading, each component is inverted and moves toward the next component. Therefore, the dissipation of energy is occurred due to the curling of edges and circumferential contraction in the tube wall. The inversion process of tubes under axial compression is simulated using the ABAQUS nonlinear finite element code. To verify the numerical simulation, some experimental tests are carried out. Moreover, a parametric study has been conducted to investigate the geometric effects of tube including end-capped, numbers of conical components, semi-apical angle and edge length of components. The results show that with appropriate selection of geometric dimensions of the new conical absorber has a significant role in reducing the initial peak load without a noticeable change in the specific energy absorption. [ABSTRACT FROM AUTHOR]

Published
2024
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11. De Bello Homomorphico: Investigation of the extensibility of the OpenFHE library with basic mathematical functions by means of common approaches using the example of the CKKS cryptosystem.

Author

Prantl, Thomas, Horn, Lukas, Engel, Simon, Iffländer, Lukas, Beierlieb, Lukas, Krupitzer, Christian, Bauer, André, Sakarvadia, Mansi, Foster, Ian, and Kounev, Samuel

Subjects
*MATHEMATICAL functions, *CLOUD storage, *DATA privacy, *CRYPTOGRAPHY, *SET functions, *SQUARE root, *DATA security
Abstract

Cloud computing has become increasingly popular due to its scalability, cost-effectiveness, and ability to handle large volumes of data. However, entrusting (sensitive) data to a third party raises concerns about data security and privacy. Homomorphic encryption is one solution that allows users to store and process data in a public cloud without the cloud provider having access to it. Currently, homomorphic encryption libraries only support addition and multiplication; other mathematical functions must be implemented by the user. To this end, we discuss and implement the division, exponential, square root, logarithm, minimum, and maximum function, using the CKKS cryptosystem of the OpenFHE library. To demonstrate that complex applications can be realized with this extended function set, we have used it to homomorphically realize the Box–Cox transform, which is used in many real-world applications, e.g., time-series forecasts. Our results show how the number of iterations required to achieve a given accuracy varies depending on the function. In addition, the execution time for each function is independent of the input and is in the range of ten seconds on a reference machine. With this work, we provide users with insights on how to extend the original restricted function set of the CKKS cryptosystem of the OpenFHE library with basic mathematical functions. [ABSTRACT FROM AUTHOR]

Published
2024
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12. Unanticipated Fault Detection and Isolation of Telescope Drive System Based on Luenberger Observer and Axes Transformation.

Author

Zhuangzhuang Deng, Yang, Shihai, Li, Yun, Gu, Xiaojie, Xu, Lingzhe, and Liu, Ruiqiang

Abstract

This paper puts forward a new strategy current sensor unanticipated faults detection and isolation (FDI) for permanent magnet synchronous motor (PMSM) in a telescope drive system. This approach uses axes transformation, PMSM model and Luenberger observer to generate residuals, and the influence of unanticipated faults (UFs) in different phases on the current components is analyzed. The sensor UFs detection is performed by processing residuals obtained from the observer. In addition, based on the information provided by fault detection, an innovative logic judgment algorithm is devised to realize fault isolation. The proposed method can discriminate between single UF of different types and multiple simultaneous UFs of various categories as well as faulty current sensors. Extensive simulation experiments prove that the designed logic judgment algorithm is effective, and the FDI can be implemented successfully. [ABSTRACT FROM AUTHOR]

Published
2024
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15. Galileo's View of the Moon: The stir created by the starry messenger

Author

Cokinos, Christopher

Subjects
The Starry Messenger (Nonfiction work), Telescope, Anthropology/archeology/folklore, Biological sciences, Earth sciences, Science and technology, Zoology and wildlife conservation
Abstract

It's commonplace to say Galileo (1564-1642) was the first person to look at the sky--especially the Moon--using a telescope. Historians know, however, that Galileo was not the first person to [...]

Published
2024

18. Mars and Venus meet

Author

Ratcliffe, Martin and Ling, Alister

Subjects
Telescope, Venus (Planet), Jupiter (Planet), Astronomy, Astronomy
Abstract

Jupiter is the highlight of evening observation for anyone with a telescope. Its moons dance around the planet and intriguing transits and occultations occur. Meanwhile, Saturn is very low in [...]

Published
2024

20. UNISTELLAR EVSCOPE 2: The eVscope 2 is a telescope and astrocamera that's easy to use, automatically navigates to night-sky objects and is easily controlled via an app

Author

Parnell-Brookes, Jase

Subjects
Nikon Corp., Telescope, Sensors, Astronomy, Photographic industry, Astronomy
Abstract

Tne eVscope 2 is a step away from traditional telescope stargazing and instead hosts an in-built camera, sleek design and electronic eyepiece. It's the second iteration of the eVscope line [...]

Published
2024

21. Brilliant Barnard

Author

Gordon, John Steele

Subjects
Telescope, Literature/writing, Political science, Vanderbilt University
Abstract

Except for medicine, astronomy is the most ancient of the sciences. The night sky, undimmed by electric lighting and thus blazing with at least six thousand visible stars, provided our [...]

Published
2024

22. Reinventing the Clock: NASA's New Tech for Space Timekeeping

Subjects
Space vehicles, Space ships, Telescope, Aerospace and defense industries, Astronomy, High technology industry, Telecommunications industry
Abstract

Greenbelt MD (SPX) Sep 19, 2024Here on Earth, it might not matter if your wristwatch runs a few seconds slow. But crucial spacecraft functions need accuracy down to one billionth [...]

Published
2024

23. Bright comet Tsuchinshan-ATLAS could be visible without a telescope for the 1st time in 80,000 years. Here's how to see it this week

Subjects
Telescope, News, opinion and commentary
Abstract

Are you ready for a naked-eye comet? Although there are never any guarantees when it comes to comets, astronomers have high hopes that (https://www.livescience.com/space/comets/comet-predicted-to-light-up-earths-skies-this-fall-may-be-falling-apart) Comet C/2023 A3 (Tsuchinshan-ATLAS) will be [...]

Published
2024

26. What??? James Webb telescope finds giant question mark in space

Subjects
James Webb Space Telescope (Artificial satellite), Telescope, News, opinion and commentary
Abstract

Since ancient times, humans have looked to the stars for answers to life's biggest questions. Now, new images from the (https://www.livescience.com/tag/james-webb-space-telescope) James Webb Space Telescope (JWST) reveal a bizarre cosmic [...]

Published
2024

28. One of the universe's biggest paradoxes could be even weirder than we thought, James Webb telescope study reveals

Subjects
James Webb Space Telescope (Artificial satellite), Telescope, Optical instruments, News, opinion and commentary
Abstract

New measurements taken with the (https://www.livescience.com/tag/james-webb-space-telescope) James Webb Space Telescope (JWST) have deepened the scientific controversy of the Hubble tension -- suggesting it may not exist at all. For years, [...]

Published
2024

29. A telescope for a golden age

Subjects
Telescope, Radiation, Background
Abstract

STORY BY FRED WATSON Dispersing cloud on Siding Spring’s far western horizon foretells a clear night for the Anglo-Australian Telescope (left foreground) as its dome is opened for twilight calibration [...]

Published
2024

30. Vaonis Hestia smartphone-based telescope

Subjects
Telescope, Smart phones, Smart phone
Abstract

Reviews / Our experts review the latest kit FIRST LIGHT Vaonis Hestia smartphone-based telescope Add your phone to this manual device to turn it into a smart scope WORDS: JEMIE [...]

Published
2024

31. SPIRAL UNBOUND

Subjects
Telescope, Force and energy
Abstract

Regulars / EYE ON THE SKY SPIRAL UNBOUND Spiral galaxy NGC 3981 is slowly being pulled apart VÍCTOR M BLANCO 4-METER TELESCOPE, 19 JUNE 2024 “T hings fall apart; the [...]

Published
2024

32. SCOPE DOCTOR

Subjects
Telescope, Physicians, Astronomy, Light pollution
Abstract

Regulars SCOPE DOCTOR Our equipment specialist cures your optical ailments and technical maladies With Steve Richards Email your queries to (mailto:scopedoctor@skyatnightmagazine.com) scopedoctor@skyatnightmagazine.com I live in a town with a lot [...]

Published
2024

33. SpaceX tweaks Starlink to save radio astronomy from satellites

Subjects
Telescope, Artificial satellites, Astronomy, Electromagnetism
Abstract

Jeremy Hsu RADIO telescopes observing the cosmos face growing challenges because of electromagnetic interference from thousands of satellites in low Earth orbit. Now, experiments involving SpaceX’s Starlink satellites have shown [...]

Published
2024

34. SpaceX tweaks Starlink to save radio astronomy from satellites

Subjects
Telescope, Artificial satellites, Astronomy, Electromagnetism
Abstract

News / Space SpaceX tweaks Starlink to save radio astronomy from satellites Jeremy Hsu RADIO telescopes observing the cosmos face growing challenges because of electromagnetic interference from thousands of satellites [...]

Published
2024

35. James Webb telescope spots 6 enormous 'rogue planets' tumbling through space without a star

Subjects
James Webb Space Telescope (Artificial satellite), Planets, Telescope, Optical instruments, News, opinion and commentary
Abstract

The (https://www.livescience.com/james-webb-space-telescope) James Webb Space Telescope (JWST) has spotted six rogue planets drifting freely through space, untethered from the gravity of any companion stars. The planets are wandering through the [...]

Published
2024

36. Field notes from space-time

Subjects
Telescope, Space shuttles, Optical instruments
Abstract

Views Columnist Field notes from space-time Look to the stars After 25 years in orbit, the Chandra space telescope is under threat. We need to protect this monument to human [...]

Published
2024

38. James Webb telescope detects signs of rust on priceless, metal-rich asteroid Psyche

Subjects
James Webb Space Telescope (Artificial satellite), Drinking (Physiology), Asteroids, Telescope, Jupiter (Planet), News, opinion and commentary
Abstract

Scientists using the (https://www.livescience.com/james-webb-space-telescope) James Webb Space Telescope (JWST) have identified a component of water on the mysterious metal-rich asteroid Psyche. The findings suggest the hydration exists as rust and [...]

Published
2024

39. Webb Telescope Captures Detailed Image of Messier 106's Active Core

Subjects
James Webb Space Telescope (Artificial satellite), Telescope, Aerospace and defense industries, Astronomy, High technology industry, Telecommunications industry
Abstract

Paris, France (SPX) Aug 13, 2024The NASA/ESA/CSA James Webb Space Telescope has captured a stunning image of Messier 106 (NGC 4258), a nearby spiral galaxy located approximately 23 million light-years [...]

Published
2024

40. ‘Banana’ galaxies unpeel a mystery

Subjects
Dark matter (Astronomy), Telescope, Galaxies, Optical instruments
Abstract

A SURPRISING number of distant, banana-shaped galaxies spotted by the James Webb Space Telescope (JWST) could be tracing a vast web of dark matter from the universe’s first moments, and [...]

Published
2024

41. ‘Banana’ galaxies unpeel a mystery

Subjects
Dark matter (Astronomy), Telescope, Galaxies
Abstract

News Cosmology ‘Banana’ galaxies unpeel a mystery Strange, banana-shaped galaxies spotted by astronomers seem to take this form because of filaments of dark matter, finds Alex Wilkins A SURPRISING number [...]

Published
2024

42. NASA shuts down down asteroid-hunting NEOWISE telescope as the sun drags it to its doom

Subjects
Space vehicles, Space ships, Asteroids, Telescope, Astronomy, Hunting, News, opinion and commentary
Abstract

NASA's only space telescope dedicated to planetary defense has turned off its transmitter for the last time, ending its 15-year career detecting near-Earth (https://www.livescience.com/space/astronomy/asteroids) asteroids and comets. The spacecraft -- [...]

Published
2024

43. NSF-DOE Rubin Observatory installs secondary mirror on Simonyi Survey Telescope

Subjects
Telescope, Aerospace and defense industries, Astronomy, High technology industry, Telecommunications industry
Abstract

Los Angeles CA (SPX) Aug 05, 2024 The 3.5-meter secondary mirror for the Vera C. Rubin Observatory has been successfully installed on the Simonyi Survey Telescope at Cerro Pachon, Chile. [...]

Published
2024

44. James Webb telescope confirms the earliest galaxy in the universe is bursting with way more stars than we thought possible

Subjects
Telescope
Abstract

The (https://www.livescience.com/james-webb-space-telescope) James Webb Space Telescope (JWST) has spotted the earliest galaxy ever seen, and its unusually bright light is coming from a bizarre frenzy of star formation. Named (https://www.livescience.com/space/cosmology/james-webb-telescope-discovers-the-2-earliest-galaxies-in-the-known-universe-and-1-is-shockingly-big) […]

Published
2024

45. Reach for the stars

Subjects
Telescope
Abstract

REGULARS / EYE OPENER Reach for the stars EAGLE NEBULA First captured by NASA's Hubble Telescope in 1995, the Pillars of Creation are among the most iconic astronomical images ever [...]

Published
2024

46. Celestron StarSense Explorer 114mm tabletop Dobsonian

Subjects
Telescope, Smart phones, Astronomy, Smart phone
Abstract

Reviews / Our experts review the latest kit FIRST LIGHT Celestron StarSense Explorer 114mm tabletop Dobsonian A fun and budget-friendly option that's easy to control from your phone WORDS: SONIA […]

Published
2024

47. Top targets for your phone-and-telescope combo

Subjects
Telescope, Astronomy
Abstract

Regulars Top targets for your phone-and-telescope combo There are a dazzling number of night-sky objects that make great photographic targets, but you'll get the best results if you choose ones […]

Published
2024

48. Unistellar Odyssey Pro smart telescope

Subjects
Telescope, Photographic industry, Nikon Corp.
Abstract

Reviews / Our experts review the latest kit FIRST LIGHT Unistellar Odyssey Pro smart telescope From planets to galaxies, this foolproof all-in-one captures them all – for a price WORDS: […]

Published
2024

49. Smartphone photography with a teles cope

Subjects
Telescope, Smart phones, Photography, Astronomy, Smart phone
Abstract

Regulars / The fundamentals of astronomy for beginners EXPLAINER Smartphone photography with a teles cope Mary McIntyre explains how to get impressive night-sky images using your phone One of the […]

Published
2024

50. THE SKY GUIDE CHALLENGE

Subjects
Telescope, Astronomy
Abstract

The Sky Guide THE SKY GUIDE CHALLENGE At the heart of beautiful planetary nebulae are dying stars. Can you spot them? Planetary nebulae are amazing objects to track down and […]

Published
2024

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