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Pro-am astronomy — the working partnership between professional and amateur astronomers — is one of the few sciences where...

Catadioptric Telescopes: Compound Designs Explained (2026)

A catadioptric telescope is a compound optical system that combines refractive lens elements and reflective mirrors in a single...

Maksutov-Cassegrain Telescopes: The Planetary Specialist (2026)

A Maksutov telescope is a compact catadioptric (compound) telescope that pairs a thick, deeply curved meniscus corrector lens at...

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Exploring Dark Matter: Unraveling the Universe’s Hidden Secrets

Explore the enigma of dark matter in this insightful essay: its discovery, role in cosmic structure, and the quest to unravel its mysteries

Pro-Am Astronomy: How Amateurs Drive Real Science

Pro-am astronomy — the working partnership between professional and...

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A catadioptric telescope is a compound optical system that...

Maksutov-Cassegrain Telescopes: The Planetary Specialist (2026)

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Schmidt-Cassegrain Telescopes (SCT): The Complete Guide (2026)

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Dobsonian Telescopes: The Best Beginner Telescope, Explained (2026)

A dobsonian telescope is the single most recommended first...

Reflector Telescope: The Complete Guide to Mirror-Based Telescopes (2026)

How reflector telescopes work, the Newtonian, Cassegrain and Ritchey-Chretien designs, collimation, what they are best for, and how to choose one.

Refractor Telescopes Explained: How They Work, Types and Best Uses (2026)

How refractor telescopes work, achromatic vs apochromatic lenses, every refractor type, what they are best for, and how to choose one.

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Al-Farghani, also known in the West as Alfraganus

Al-Farghani (Latinized Alfraganus) was a 9th-century astronomer from Farghana, in present-day Uzbekistan, and one of the towering figures of...

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Pro-Am Astronomy: How Amateurs Drive Real Science

Pro-am astronomy — the working partnership between professional and...

Catadioptric Telescopes: Compound Designs Explained (2026)

A catadioptric telescope is a compound optical system that...

Maksutov-Cassegrain Telescopes: The Planetary Specialist (2026)

A Maksutov telescope is a compact catadioptric (compound) telescope...

Schmidt-Cassegrain Telescopes (SCT): The Complete Guide (2026)

A schmidt cassegrain telescope is a compact catadioptric (compound)...

Dobsonian Telescopes: The Best Beginner Telescope, Explained (2026)

A dobsonian telescope is the single most recommended first...