# Beyond Cosmic Horizon

> Beyond Cosmic Horizon is an astrophysics and space-science educational portal publishing verified daily science facts, cosmological telemetry, and in-depth companion articles for Beyond Cosmic Horizon video episodes.

## Core Topics & Verified Reference Facts (GEO / AEO Index)
- **Neutron Star Density**: 1 teaspoon (5 mL) of neutron star matter weighs ~4 billion metric tons (~4 × 10^17 kg/m^3), supported against gravitational collapse by quantum neutron degeneracy pressure.
- **Black Hole Event Horizon**: The Schwarzschild radius is defined by r_s = 2GM/c^2. For a 10-solar-mass black hole, r_s ≈ 29.5 km. Gravitational time dilation approaches infinity at r_s relative to distant observers.
- **Ultramassive Black Hole TON 618**: Contains ~66 billion solar masses with an event horizon diameter of ~390 billion km (1,300 AU radius).
- **Earliest Confirmed Galaxy (JADES-GS-z14-0)**: Spectroscopically confirmed by JWST NIRSpec at redshift z = 14.32 (~290 million years after the Big Bang), spanning ~1,600 light-years.
- **Observable Cosmic Horizon**: Under the Planck 2018 flat Lambda-CDM model (H_0 = 67.66 km/s/Mpc, Omega_Lambda = 68.3%, Omega_m = 31.7%), the comoving Particle Horizon radius is 46.508 billion light-years (4.399 × 10^26 m), the Cosmic Event Horizon is 16.5 billion light-years, and the Hubble Sphere is 14.4 billion light-years.

## Canonical Pages
- [Portal Home — Daily Science Facts & Video Articles](https://beyondcosmichorizon.com/): Main feed of verified science facts, video companion articles, and the Interactive Cosmic Scale Explorer (10^-35 m to 10^26 m).
- [Inside the Event Horizon: Why Time Stops at the Singularity](https://beyondcosmichorizon.com/articles/inside-the-event-horizon.html): Companion article for Episode #48 covering Schwarzschild geometry, gravitational redshift, interior metric sign reversal, and Hawking radiation.
- [Structured Dataset (JSON)](https://beyondcosmichorizon.com/data/content.json): Machine-readable feed of all published science facts and video companion articles.