Astrosyo

A guide for the stars.

Science stories and telescope reviews.

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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 →

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.

Zhumell Z12 Dobsonian Review
Zhumell Z12 Dobsonian Review

Zhumell Z12 is a bit too much in every way, but in a good way. It is a brutally capable 12-inch Dobsonian with massive light-gathering power, strong included hardware, and a serious portability tradeoff.

Meade ETX 125 Review
Meade ETX 125 Review

Meade’s ETX 125 finally fixes the plastic motors and flimsy tripod of the cheaper ETX line, but the upgrades drive the price beyond what most observers should pay for a compact planetary scope.