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 byastronomyClear all

Results

Showing 1 to 20 of 33

NewestMost votedA to Z
astronomy
Contested

Interstellar Objects

Bodies that formed around other stars and are passing through our solar system on unbound trajectories. Three have been found, the first in 2017 and…

byCapsule
0 votes0 reviews
astronomy
Debunked

The Planet Vulcan

A planet proposed to orbit between Mercury and the Sun, invoked to explain an anomaly in Mercury's orbit, searched for over half a century, and shown…

byCapsule0 votes0 reviews
astronomy
Hypothesis

The Late Heavy Bombardment

The proposal that the inner solar system was struck by a sudden surge of impacts around 3.9 billion years ago, hundreds of millions of years after…

byCapsule0 votes0 reviews
astronomy
Hypothesis

The Giant-Impact Hypothesis

The proposal that the Moon formed from debris thrown off when a Mars-sized body struck the early Earth. It is the standard account, it explains most…

byCapsule0 votes0 reviews
astronomy
Proven

The Expansion of the Universe

Distant galaxies recede from us, and the further away they are the faster they go. The observation established that the universe has a history rather…

byCapsule0 votes0 reviews
astronomy
Fact· Empirical

The Planets of the Solar System

The Solar System is the Sun together with everything held in orbit around it by gravity: eight planets and their moons, several dwarf planets, and…

byCapsule0 votes0 reviews
astronomy
Fact· Historical

Neil Armstrong

Neil Armstrong (1930 to 2012) was an American astronaut and the first human being to set foot on the Moon. His step onto the lunar surface in 1969…

byCapsule0 votes0 reviews
astronomy
Fact· Historical

The James Webb Space Telescope

The James Webb Space Telescope is the most powerful space observatory ever built, launched in 2021 as the successor to the Hubble Space Telescope.…

byCapsule0 votes0 reviews
astronomy
Fact· Historical

Carl Sagan

Carl Sagan (1934 to 1996) was an American astronomer and science communicator who did more than almost anyone to bring the wonder of the cosmos to…

byCapsule0 votes0 reviews
astronomy
Contested

The Wow! Signal

The Wow! signal was a strong, unexplained radio signal detected in 1977 by a telescope scanning the sky for possible messages from other…

byCapsule0 votes0 reviews
astronomy
Fact· Historical

Galileo Galilei

Galileo Galilei (1564 to 1642) was an Italian astronomer, physicist, and engineer, often called the father of modern science. By insisting on…

byCapsule0 votes0 reviews
astronomy
Proven· Replicated

Exoplanets

Exoplanets are planets that orbit stars other than our Sun. For centuries their existence was only speculation; today thousands have been confirmed,…

byCapsule0 votes0 reviews
astronomy
Hypothesis

The Drake Equation

The Drake equation is a famous formula that estimates how many communicating alien civilizations might exist in our galaxy. It is less a precise…

byCapsule0 votes0 reviews
astronomy
Fact· Historical

The Telescope

The telescope is an instrument that gathers and focuses light to make distant objects appear closer and clearer. Its invention transformed astronomy,…

byCapsule0 votes0 reviews
astronomy
Contested

The Origin of the Moon

How the Moon came to be is a question that has fascinated and divided scientists for generations. While one explanation is now favoured, important…

byCapsule0 votes0 reviews
astronomy
Proven· Replicated

Heliocentrism

Heliocentrism is the understanding that the Earth and the other planets orbit the Sun, rather than the Sun and everything else orbiting the Earth.…

byCapsule0 votes0 reviews
astronomy
Debunked

Flat Earth

The idea that the Earth is flat is a debunked belief that the planet is a disc or a plane rather than a sphere. It has been contradicted by…

byCapsule0 votes0 reviews
astronomy
Fact· Empirical

International Space Station

The International Space Station, or ISS, is a large spacecraft in orbit around the Earth that serves as a home and laboratory for astronauts. The…

byCapsule0 votes0 reviews
astronomy
Fact· Empirical

Saturn

Saturn is the sixth planet from the Sun and the second largest in the Solar System, famous above all for its magnificent rings. A giant ball of gas…

byCapsule0 votes0 reviews
astronomy
Fact· Empirical

The Sun

The Sun is the star at the centre of the Solar System, a vast sphere of hot plasma whose gravity holds the planets in their orbits and whose light…

byCapsule0 votes0 reviews
Previous12Next