Capsule
DonateLog inCreate account
Menu

Navigation

  • Main page
  • Capsules
  • Learning
  • Mapping
  • Rankings
  • Organizations
  • Create
  • Forums
  • Research

Interaction

  • Messages
  • Verify
  • Help
  • About Capsule

Display

Appearance

Environment

EnvironmentsDefault
Capsule
Log in

Navigation

  • Main page
  • Capsules
  • Learning
  • Mapping
  • Rankings
  • Organizations
  • Create
  • Forums
  • Research

Interaction

  • Messages
  • Verify
  • Feedback
  • Help
  • About Capsule

Truth Classification

  • Fact
  • Theory
  • Hypothesis
  • Proven
  • Contested
  • Debunked
How classification works

Capsule of the Day

DebunkedThe PolygraphThe instrument popularly called a lie detector, which records breathing, blood pressure, pulse and skin conductance dur…

New in the Library

  • FactTardigrade
  • FactMonarch Butterfly
  • FactSpider

Capsule

© 2026 Solis Holdings Group Inc. All rights reserved.

Built by Solis Dev, a technology studio operating under Solis Holdings Group Inc.

  • Policy
  • Terms of Use
  • Methodology
  • Corrections
  • Non-partisanship
  • Transparency
  • Developers
  • About
  • Discord
  • Sitemap

Capsule, the capsule-pill mark, and the clock logo are trademarks of Solis Holdings Group Inc. All content, source code, and design assets are the exclusive property of Solis Holdings Group Inc., unless otherwise noted. Unauthorized reproduction is prohibited.

The library

Capsules

1,028 capsules, each one classified by the strength of its evidence.

All1,028Fact599Proven130Theory89Hypothesis71Contested90Debunked48
geography236biology88physics67history54medicine45astronomy33psychology26mathematics26chemistry20engineering20astrophysics19neuroscience19anthropology18art18
Filtered byastrophysicsClear all

Results

Showing 1 to 19 of 19

NewestMost votedA to Z
Fact

Galaxies

Gravitationally bound systems of stars, gas, dust and dark matter. They are the units in which the visible matter of the universe is organised, and…

byCapsule
0 votes0 reviews
Aug 5, 2026
Fact

Neutron Stars

The collapsed cores left by massive stars, containing more than the Sun's mass within a sphere about twenty kilometres across. They are the densest…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Supernovae

The explosive destruction of a star, briefly outshining an entire galaxy. Supernovae produce and disperse most of the heavy elements, they trigger…

byCapsule0 votes0 reviewsAug 5, 2026
Hypothesis

Modified Newtonian Dynamics

Galaxies rotate faster at their edges than the visible matter can explain. The standard answer is that unseen dark matter supplies the extra gravity.…

byCapsule0 votes0 reviewsAug 3, 2026
Theory· Scientific

Stellar Nucleosynthesis

Stellar nucleosynthesis is the theory explaining where the chemical elements come from. It holds that the stars are the furnaces in which almost all…

byCapsule0 votes0 reviewsJun 20, 2026
Theory· Scientific

The Formation of the Solar System

The nebular hypothesis is the accepted scientific theory of how the Sun and its planets formed. It holds that the entire Solar System condensed,…

byCapsule0 votes0 reviewsJun 20, 2026
Proven· Replicated

Black Holes

A black hole is a region of space where gravity is so intense that nothing, not even light, can escape from within it. Once a purely theoretical…

byCapsule0 votes0 reviewsJun 19, 2026
Fact· Historical

Stephen Hawking

Stephen Hawking (1942 to 2018) was a British theoretical physicist who became one of the most famous scientists of his time, renowned for his work on…

byCapsule0 votes0 reviewsJun 12, 2026
Contested

The Hubble Tension

The Hubble tension is a genuine and growing puzzle in cosmology: two careful ways of measuring how fast the universe is expanding give answers that…

byCapsule0 votes0 reviewsJun 12, 2026
Proven· Replicated

Gravitational Lensing

Gravitational lensing is the bending of light from distant objects by the gravity of massive bodies that lie in between, which can magnify and…

byCapsule0 votes0 reviewsJun 12, 2026
Proven· Replicated

The Bending of Starlight

The bending of starlight is the deflection of light by gravity, predicted by Einstein's general theory of relativity and confirmed during a solar…

byCapsule0 votes0 reviewsJun 12, 2026
Proven· Replicated

The Cosmic Microwave Background

The cosmic microwave background is a faint glow of microwave radiation that fills all of space, the leftover heat from the early universe. Its…

byCapsule0 votes0 reviewsJun 12, 2026
Proven· Replicated

Gravitational Waves

Gravitational waves are ripples in the fabric of space and time, set off by some of the most violent events in the universe. Predicted by Einstein a…

byCapsule0 votes0 reviewsJun 12, 2026
Hypothesis

Cosmic Inflation

Cosmic inflation is the hypothesis that, in the first tiny fraction of a second after the Big Bang, the universe expanded at an almost unimaginable…

byCapsule0 votes0 reviewsJun 12, 2026
Theory

Stellar Evolution

Stellar evolution is the scientific account of how stars are born, live, and die over millions or billions of years. Though no one can watch a single…

byCapsule0 votes0 reviewsJun 12, 2026
Debunked

The Steady State Theory

The steady state theory was a model of the universe, popular in the mid twentieth century, which held that the universe has always looked roughly the…

byCapsule0 votes0 reviewsJun 11, 2026
Proven· Replicated

The Expansion of the Universe

The universe is expanding: the galaxies are, on average, moving apart, and the space between them is stretching. Once a startling discovery, the…

byCapsule0 votes0 reviewsJun 11, 2026
Contested

How the Universe Will End

The ultimate fate of the universe is one of the deepest questions in science. Cosmologists have proposed several very different endings, and which…

byCapsule0 votes0 reviewsJun 11, 2026
Contested

Dark Energy

Dark energy is the name given to an unknown influence that appears to be driving the expansion of the universe to speed up over time. It is thought…

byCapsule0 votes0 reviewsMar 29, 2026