Formal & Natural Sciences
Astronomy & Space Science
Everything above the atmosphere: what is out there, how it got there, and how we get to it.
9 fields · 83 topics · 9 curated works
Fields within Astronomy & Space Science
Observational Astronomy
10The instruments and techniques that turn photons into data.
Telescope Design · Photometry · Astronomical Spectroscopy · Astrometry · Radio Astronomy
Planetary Science
9The bodies of our own solar system, in detail.
Terrestrial Planets · Gas & Ice Giants · Planetary Moons · Asteroids & Comets · Planetary Atmospheres
Stellar Astrophysics
10How stars work, and how they die.
Stellar Structure · Stellar Evolution · Stellar Nucleosynthesis · Star Formation · Variable Stars
Galactic & Extragalactic Astronomy
9Structure above the scale of single stars.
Structure of the Milky Way · Galaxy Morphology · Galaxy Formation & Evolution · Active Galactic Nuclei · Quasars
Cosmology
10The universe as a single object with a history.
Big Bang Cosmology · Cosmic Microwave Background · Cosmic Inflation · Dark Matter · Dark Energy
Exoplanets
8Planets around other stars — a field that did not exist before 1992.
Detection Methods · Transit Photometry · Radial Velocity Method · Hot Jupiters · Super-Earths & Sub-Neptunes
Astrobiology
8Whether life is a cosmic accident or a cosmic tendency.
Origin of Life · Extremophiles · Biosignatures · The Drake Equation · The Fermi Paradox
Spaceflight & Astronautics
12The engineering and politics of leaving the planet.
Orbital Mechanics · Launch Vehicles · Propulsion Systems · Spacecraft Design · Human Spaceflight
History of Astronomy
7How the sky was mapped, and how often we were wrong about it.
Ancient Astronomy · The Copernican Revolution · Galileo & the Telescope · Kepler's Laws · The Great Debate
Reading in Astronomy & Space Science
9Start here
No prior grounding assumed.
- BookTurn Left at OrionGuy Consolmagno & Dan M. Davis, 1989
Shows what objects actually look like through a small telescope rather than in observatory photographs, which is why beginners keep going.
- BookPale Blue DotCarl Sagan, 1994
A case for spaceflight built on the argument that a cosmic perspective is the only accurate one.
Then
Assumes you know the vocabulary.
- BookThe First Three MinutesSteven Weinberg, 1977
Reconstructs the early universe minute by minute, showing how much cosmology follows from a handful of measurements.
- BookRare EarthPeter Ward & Donald Brownlee, 2000
Argues microbial life may be common while complex life is vanishingly rare — influential, and disputed at nearly every step.
Go deeper
Primary sources and full treatments.
- PaperThe Exploration of Cosmic Space by Means of Reaction DevicesKonstantin Tsiolkovsky, 1903
Derives the rocket equation, establishing the exponential mass penalty that still governs every launch.
- BookGalactic DynamicsJames Binney & Scott Tremaine, 1987
The reference on how gravity organises stars into galaxies, and where the evidence for dark matter actually comes from.
- BookAn Introduction to Modern AstrophysicsBradley Carroll & Dale Ostlie, 1996
Derives stellar structure and evolution from physics you already know, and is the standard bridge from undergraduate physics to astrophysics.
- BookPlanetary SciencesImke de Pater & Jack J. Lissauer, 2001
Treats the planets as one comparative physical system rather than as a sequence of worlds to be described in turn.
- BookThe Exoplanet HandbookMichael Perryman, 2011
Surveys every detection method and its biases, which is the only honest way to read claims about how common planets like ours are.