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Reflections on Placing Mirrors in Space
On plans, new and old, to put mirrors in orbit
Aug 4
•
Alastair Williams
25
6
3
Why Is the Earth Coated in the Dust of a Supernova?
On a strange discovery deep under the waves of the Pacific
Jul 9
•
Alastair Williams
32
5
7
An Atmosphere and a Puzzle Beyond Neptune
On the discovery of a faint layer of gas in the frozen outer solar system
May 15
•
Alastair Williams
34
4
4
A Nuclear Ship For Mars: Making Sense of Space Reactor Freedom
On NASA's quest to send a nuclear reactor to Mars
May 3
•
Alastair Williams
30
9
7
Why Have There Been So Many Fireballs in 2026?
On a sudden surge in bright meteors
Apr 15
•
Alastair Williams
26
2
9
The Strange Problem With Red Supergiants
Are the biggest stars vanishing without a trace?
Mar 19
•
Alastair Williams
51
6
13
Data Centres In Orbit Are Just As Crazy As You Think
On the latest space hype
Mar 5
•
Alastair Williams
35
13
13
How to Learn Physics for Free - 2026 Edition
A guide for the curious
Feb 3
•
Alastair Williams
31
3
10
The Bold Insanity of Artemis II: America Prepares to Return to the Moon
On the second flight of America's Return to the Moon
Jan 31
•
Alastair Williams
26
8
13
The Debris of Creation: Hubble Watches Worlds Collide
On the discovery of violent collisions around Fomalhaut
Jan 22
•
Alastair Williams
33
12
Project Mercury and the SOFAR Bomb
Why bombs were hidden on the first space capsules
Jan 16
•
Alastair Williams
19
2
8
Notes On Learning Hard Things
Reflections on the art of studying physics
Dec 1, 2025
•
Alastair Williams
50
5
17
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