Astrosyo

A guide for the stars.

Science stories and telescope reviews.

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Cosmic Stories →

How Diffusion Models Work
How Diffusion Models Work

A step-by-step, visual explainer of forward noise and reverse denoising in modern diffusion models.

Lunar Phases
Lunar Phases

An overview of the phases of our Moon.

Earth and Neptune Size Comparison
Earth and Neptune Size Comparison

The true scale difference between Neptune and Earth.

Earth
Earth

An overview of Earth, our home planet.

Reviews →

Zhumell Z114 Review
Zhumell Z114 Review

The Zhumell Z114 is a compact, budget-friendly tabletop Dobsonian with solid build quality, good beginner optics, and excellent portability—an easy recommendation for first-time observers and a convenient grab-and-go scope for quick sessions.

Zhumell Z100 Review
Zhumell Z100 Review

The Zhumell Z100 is a compact 100mm tabletop Dobsonian with decent optics, surprisingly solid build quality, and an easy-to-use mount—an excellent low-cost entry point for beginners and a convenient grab-and-go scope.

Celestron CPC 800 GPS Review
Celestron CPC 800 GPS Review

The Celestron CPC 800 GPS is a bulky but versatile 8-inch Schmidt-Cassegrain with strong optical performance, accurate GoTo tracking, and broad capability for visual observing plus planetary imaging.

Celestron CPC 925 GPS Review
Celestron CPC 925 GPS Review

The Celestron CPC 925 GPS is a versatile 9.25-inch Schmidt-Cassegrain with strong optics, accurate GoTo tracking, and easy setup, but it is heavy, expensive, and not the most portable or imaging-friendly option in its class.