Astrosyo

A guide for the stars.

Science stories and telescope reviews.

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Science Stories →

Spiral Galaxies
Spiral Galaxies

An overview of spiral galaxies: structure, dynamics, formation, and evolution.

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 →

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.

Meade Polaris 130 EQ Reflector Review
Meade Polaris 130 EQ Reflector Review

Legacy impressions of the Meade Polaris 130 EQ reflector from 2020, highlighting its parabolic optics, deep-sky strengths, and the trade-offs of the lightweight equatorial mount and bundled accessories.

ZWO Seestar S30 Review
ZWO Seestar S30 Review

The Seestar S30 is an ultra-portable smart telescope with a 30 mm apochromatic triplet objective, automated alignment, live stacking, and solar capability, designed for beginners and astrophotographers who want results without complexity.

Celestron AstroMaster 114EQ Review
Celestron AstroMaster 114EQ Review

The Celestron AstroMaster 114EQ uses a cost-cutting Bird-Jones optical design that results in poor image quality, difficult collimation, and frustrating usability.

Informational Posts →

What Are Dust Scattering Halos?

Dust scattering halos form when X-ray light interacts with interstellar dust grains and reaches us with a slight delay, creating ring-like structures around X-ray sources.

Quadrantids Meteor Shower, January 3rd 2026

The Quadrantids peak each January 3–4 as Earth passes through debris from asteroid 2003 EH1, producing fast, bright meteors that radiate from the northern sky. Best seen from the Northern Hemisphere, the shower is brief but can be impressively intense under dark skies.

Best Telescopes for Kids

Kid-friendly telescope picks that balance durability, ease of use, and real night-sky performance for young explorers.

Next Full Moon, 2025

Key details for the November 5, 2025 full moon, plus observing tips, the 2025 full moon calendar, and eclipse highlights.

NASA Posts →

Saturn’s North Polar Hexagon

A persistent hexagonal cloud pattern at Saturn’s north pole, first discovered by Voyager and later imaged in detail by Cassini.

Saturn’s Razor-Thin Rings

A Cassini spacecraft view of Saturn split by day and night, with its delicate rings slicing across the scene.

Jupiter’s Giant Storms and High Clouds

A JunoCam view of two massive storms in Jupiter’s atmosphere, showing high-altitude clouds casting shadows on swirling lower layers.