JSUadmin – Page 30 – Just Saturn Uranus

What are your opinions on the condition of the primary mirror, and is there any evidence of corrosion around its edges?

February 21, 2025

When assessing the state of a primary mirror, especially in the context of telescopes or similar optical devices, it’s crucial to look for signs of damage or degradation, as this can significantly impact performance. Corrosion on the edges can manifest as a discoloration, a dulling of the reflective surface, or visible pitting or oxidation, often […]

Which is preferable: a Skywatcher 150 floor-standing Dobsonian or a pre-owned Skywatcher Virtuoso 150P priced at $388?

February 21, 2025

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10:00 am

Choosing between a new Skywatcher 150 floor-standing Dobsonian and a used Skywatcher Virtuoso 150P comes down to your priorities and budget. The Skywatcher 150 floor-standing Dobsonian is known for its simplicity, ease of use, and large aperture, providing excellent value for amateurs seeking good deep-sky performance. As a manual telescope, it requires manual tracking of […]

What important factors should be evaluated when purchasing a pre-owned telescope?

February 21, 2025

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10:00 am

When acquiring a second-hand telescope, several critical factors deserve careful consideration to ensure you get the best value and functionality: Optical Quality: Inspect the optics for any scratches, cracks, or coatings damage. The primary mirror or lens should be in good condition, as imperfections can significantly impact viewing quality. Type of Telescope: Understand the differences […]

What is the superior telescope?

February 21, 2025

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10:00 am

Determining which telescope is “better” depends on several factors, as the appropriateness of a telescope choice often hinges on specific needs, interests, and circumstances. Key considerations include: Purpose and Use: Are you using it for astrophotography, casual stargazing, or scientific research? A Dobsonian reflector might be suitable for deep-sky observations due to its large aperture, […]

What are the primary objectives of the Spherex Telescope?

February 21, 2025

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9:59 am

The SPHEREx (Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer) mission aims to address several key scientific goals, primarily focused on understanding the universe’s evolutionary processes. One of its main objectives is to investigate cosmic inflation, which is the rapid expansion of space in the early universe. By surveying the […]

Should I choose an astronomy app or an astronomy book?

February 21, 2025

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9:59 am

The choice between an astronomy app and an astronomy book depends on your learning style, preferences, and goals. Astronomy apps are highly interactive tools that provide real-time star maps, augmented reality features, and access to an extensive range of images, videos, and up-to-date astronomical data. They offer convenience, as you can easily carry them on […]

Is adding decorations to my telescope a legal offense or an expression of individuality?

February 21, 2025

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9:59 am

Decorating your telescope is generally considered a personal choice and is not a criminal offense. However, it’s worth exploring the implications of this decision in two main areas: legal considerations and functional impact. Legally, as long as the telescope is your personal property and the decorations do not include illegal substances or materials (like certain […]

Is it possible that this was once a planet?

February 21, 2025

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9:59 am

To determine whether something could have been a planet, we should consider its characteristics and how they align with the criteria that define a planet. According to the International Astronomical Union (IAU), a celestial body must meet the following criteria to be considered a planet: It must orbit the Sun or another star. It must […]

What is the most suitable mount for a Skymax 90 telescope?

February 21, 2025

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9:59 am

The Skymax 90, being a compact Maksutov-Cassegrain telescope, requires a mount that balances stability with portability. Here are a few options to consider based on different use cases: Tabletop Mounts: Ideal for beginners or casual observers, a simple tabletop mount can provide enough stability for short sessions, especially for indoor viewing through windows. The Orion […]

Which tool should I use to collimate my 6-inch f/8 Dobsonian telescope?

February 21, 2025

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9:59 am

Collimating a telescope, especially a Dobsonian, ensures that the mirrors are precisely aligned for optimal viewing. For a 6-inch f/8 Dobsonian, there are several collimation tools you can use: Cheshire Eyepiece: This is one of the most popular tools for collimation. It is a simple device that uses crosshairs to help you align the mirrors. […]