Cosmology

Key people

• Stephen HawkingBritish theoretical physicist, cosmologist and author (1942–2018)
• Giordano BrunoItalian Dominican friar, philosopher and mathematician (1548–1600)
• Steven WeinbergAmerican theoretical physicist (1933-2021)
• Arno Allan PenziasGerman-born American physicist

Read

• ΤίμαιοςPlato · 1520Book
• Natural SymbolsProfess Douglas · 1970Book
• Process and realityAlfred North Whitehead · 1929Book
• An esoteric cosmologyRudolf Steiner · 1987Book

Watch

• Galaxy ring discovery challenges thinking on universe | BBC NewsYouTube
• Cosmic Microwave Background ExplainedYouTube
• Origins of the Universe 101 | National GeographicYouTube
• Scientists Discovered We May Be Inside a Cosmic Hole... and It Changes EverythingYouTube
• The Big Bang, Cosmology part 1: Crash Course Astronomy #42YouTube
• Dark Matter: Crash Course Astronomy #41YouTube
• Why Is Space So Smooth? The Cosmic Mystery Explained | Things Explained |YouTube
• Galaxies, part 1: Crash Course Astronomy #38YouTube
• The Universe Explained: Exoplanets, Black Holes, Big Bang & Cosmic MysteriesYouTube
• Ep 1 - The Irrefutable Evidence of the Big Bang TheoryYouTube

Listen

• Daniel and Kelly’s Extraordinary UniverseiHeartPodcastsPodcast
• Cosmology & ScienceRichard B. EmersonPodcast
• Crash Course Pods: The UniverseCrash Course Pods, ComplexlyPodcast
• The Supermassive PodcastThe Royal Astronomical SocietyPodcast

Voices to follow

• Neil deGrasse Tyson@neiltyson · XAmerican astrophysicist and science communicator
• Luke Barnes@lukebarnesastro · XAustralian astrophysicist
• Ethan Siegel@startswithabang · XAstrophysicist and science communicator
• Janna Levin@jannalevin · XAmerican theoretical cosmologist

Debates

• Is dark matter composed of undiscovered particles or a modification of gravity?One view: Dark matter consists of exotic particles that interact weakly with normal matter, explaining observed gravitational effects. · Another: Dark matter's effects are better explained by altering our understanding of gravity on large scales, not new particles.Open question
• What is the ultimate fate of the universe?One view: The universe's expansion will continue indefinitely, leading to a cold, empty 'Big Freeze' as stars die out. · Another: The universe could eventually collapse in a 'Big Crunch', or be torn apart by 'Big Rip' energy.Open question
• What existed before the Big Bang?One view: The Big Bang marks the universe's absolute origin, with no 'before' in a meaningful sense for space and time. · Another: The Big Bang could be a phase in a larger, cyclical, or multiverse system, not an absolute beginning.Open question

Glossary

• Big BangThe leading theory for the universe's origin, proposing it began from an extremely hot, dense state.
• Dark MatterA mysterious, invisible substance that does not emit or reflect light but exerts gravitational pull.
• Dark EnergyA hypothetical form of energy causing the universe's expansion to accelerate.
• Cosmic Microwave Background (CMB)Faint radiation left over from the Big Bang, detectable across the universe.
• Hubble's LawThe observation that galaxies are moving away from Earth at speeds proportional to their distance.
• RedshiftThe stretching of light waves from distant galaxies, indicating they are moving away from us.

Careers

Roles this can lead toward

Student research

Published policy papers by One Young India delegates — every delegate leaves published under their own name.

• The Philadelphia Experiment: Deconstruction of a Military Myth and PseudoscienceDwij Verma

Threads 8

Where this connects to other fields — and why it's worth knowing.

• Metaphysics Philosophy

  Roughly 95% of the universe is 'dark matter' and 'dark energy,' stuff we've never actually caught or seen, only felt tugging on things. So physics' confident map of reality is mostly a giant blank region labeled 'we don't know.' The science that seems most certain is quietly built on a huge mystery.

• Religion in History History

  Figuring out the exact date for Easter or the start of Ramadan meant tracking the moon and sun with real precision, year after year. That religious need pushed people to study the sky carefully for centuries. So faith, oddly enough, was astronomy's first big sponsor.

• The Meaning of Life Philosophy

  Astronauts who see the whole Earth hanging in black space often come back changed, feeling borders are silly and life is precious; they call it the 'overview effect.' Staring at the cosmos accidentally works like therapy for the 'what's the point of it all' question. Sometimes zooming way out resets what matters.

• Satellite Imagery and Remote Sensing Geography

  The same kind of instruments astronomers point at distant stars get flipped around to stare back at Earth, watching forests, ice, and storms. It's astronomy turned inward. And when astronauts actually saw the whole fragile planet floating in black space, that gut-punch feeling, the 'overview effect', helped kick-start the environmental movement.

• Historiography History

  When you look at a distant star, you're seeing light that left it thousands of years ago, so telescopes are basically time machines showing you the past. Astronomers and historians are stuck in the same boat: both study a past they can only glimpse through leftover traces, and neither can ever rewind and run it again.

• Mythology and Epics Literature

  Those old star myths about hunters and bears in the sky were also calendars in disguise. Wrapped in a story, they told people who couldn't read when to plant crops, when floods were coming, and how to steer a boat by the stars.

• Nietzsche and Nihilism Philosophy

  Science shows a universe with no center, drifting toward a cold, dead end that hands out no purpose. Nietzsche's line "God is dead" is partly the gut-punch of that discovery. Nihilism — the fear that nothing means anything — is the emotional read on the physics.

• Religion and Science Religion

  The Big Bang theory was first proposed by a Catholic priest. Some physicists distrusted it at first because it sounded too much like a creation story. So in the fight over how the universe began, the religious side was the one backing the science.