The index
Eleven subjects, arranged as a spectrum
The order is not alphabetical. Each subject sits where it is actually observed — Ku-band radio for the satellites overhead at one end, Lyman-α ultraviolet from the early universe at the other — and takes its colour from that position. Every one of them publishes its own Atom feed.
C-band radar · 5.4 GHz
Launch & Flight
Rockets leaving the ground, boosters coming back, and the companies arguing about who gets to do it next.
66 stories · Atom feed
S-band · 2.2 GHz
Crewed Spaceflight
People off the planet: station life, spacewalks, Artemis, and the slow business of learning to stay.
52 stories · Atom feed
Thermal IR · 10 µm
The Solar System
Robots at work on other worlds — rovers, orbiters, landers and the moons that keep surprising us.
61 stories · Atom feed
He II · 30.4 nm
The Sun & Space Weather
Flares, coronal mass ejections, aurorae, and the geomagnetic storms that reach the ground.
40 stories · Atom feed
O III · 500.7 nm
Stars & Supernovae
How stars are made, how they burn, and the spectacular ways they stop.
38 stories · Atom feed
C₂ Swan · 516.5 nm
Comets & Asteroids
Comets, asteroids, meteor showers, and the interstellar visitors that pass through without stopping.
30 stories · Atom feed
H₂O · 1.4 µm
Exoplanets & Life
Other worlds around other stars, and the long argument about whether anything lives on them.
10 stories · Atom feed
Hβ · 486.1 nm
Telescopes & Instruments
The machines that do the looking — on mountaintops, at Lagrange points, and still on the drawing board.
41 stories · Atom feed
Ku-band · 12 GHz
Satellites & Orbit
The increasingly crowded shell around Earth: constellations, debris, regulation and Earth observation.
53 stories · Atom feed
Fe Kα · 6.4 keV
Black Holes
Event horizons, accretion discs, relativistic jets, and the gravitational waves left over when two of them meet.
33 stories · Atom feed
Lyman-α · 121.6 nm
Galaxies & Cosmology
Structure on the largest scales — the early universe, dark matter, dark energy, and how it all fits together.
49 stories · Atom feed
Stories are filed automatically by matching the headline, the dek and the source's own categories against a hand-written vocabulary for each subject. A story can appear under more than one — a Webb observation of a protoplanetary disc genuinely belongs in both Exoplanets and Instruments — and anything that does not match convincingly is left untagged rather than forced into the nearest bucket.