Explore a curated list of the 25 Coolest Stars — from nearby brown dwarfs and L/T/Y-class objects to ultracool M-dwarfs. Each entry lists temperature (K), spectral type, and distance (ly), letting amateur astronomers and science readers compare the coldest stellar objects and understand why they rank among the coldest known.
A complete compilation of 59 merging black holes detected to date, listing each event’s detection date (UTC), component masses (M☉), and distance (Mpc). Explore the dataset to compare mass ranges, distances, and the landmark gravitational-wave discoveries from LIGO/Virgo/KAGRA.
This comprehensive hub explains 10 different types of eclipses — from total and annular solar eclipses to penumbral lunar and grazing eclipses. For each type we describe how it forms, what it looks like, viewing safety tips, and link to deeper posts for detailed guides and event predictions.
This comprehensive list compiles 99 known Periodic Comets, providing each comet’s designation, orbital period in years, and the next predicted perihelion date. Use this resource to track appearances, plan observations, and learn the schedules and orbital characteristics of famous and lesser-known periodic visitors to the inner solar system.
Explore the 10 Smallest Objects in the Solar System, a compact guide to the tiniest moons, asteroids, comet nuclei, and minor bodies. This hub post summarizes each object’s size, location, and significance, and links to in-depth articles for further reading.
Explore 10 cosmic events that typically recur on roughly 100-year timescales — from long-returning comets and century meteor outbursts to rare solar and planetary cycles. This hub post summarizes each event and links to detailed guides so you can learn what they are, when they happen, and how to observe them.
Explore eight major types of exoplanet atmospheres in this hub post, from hydrogen-rich gas giants to thin rocky-world envelopes. Each type includes key traits, observational signatures, and linked deep-dive articles so you can learn what they reveal about formation and habitability.
Discover 12 incredible facts about Uranus — the icy, sideways-tilted giant of our solar system. This hub highlights surprising details about Uranus’ extreme axial tilt, faint rings, 27+ moons, unusual atmosphere, and exploration history, and links to in-depth articles for each fact, with clear, sourced explanations and vivid visuals.
This comprehensive list of Circumpolar Stars catalogs 32 stars visible year-round, giving constellation, declination, and minimum latitude for visibility. Perfect for amateur astronomers and navigators, the table helps you identify which stars remain above your horizon to plan observing sessions, astrophotography, and star-navigation. Use the data to create star charts and plan night-sky trips.
Uncover 12 essential facts about cosmic dust and its importance across astronomy, planetary science, and climate. This hub article explains how dust forms and moves, its role in star and planet formation, its effects on light and chemistry, and why it matters for space missions and Earth’s environment, with links to deeper posts on each topic.
