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Catch Me If You Can: What are Trojan Asteroids?
Their origins, dynamics, and what the Lucy mission reveals about the evolution of our Solar System.
Feb 6
•
Alastair Williams
and
Samreet Dhillon
17
2
5
How to Learn Physics for Free - 2026 Edition
A guide for the curious
Feb 3
•
Alastair Williams
22
4
7
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
22
8
6
Most Popular
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How to Learn Physics for Free
Oct 19, 2023
•
Alastair Williams
164
11
38
What Lies Beyond: Exploring Interstellar Space
Jun 15, 2023
•
Alastair Williams
101
9
22
Starship: The Most Ambitious Spacecraft Ever Built
Mar 3, 2023
•
Alastair Williams
11
1
The Remarkable Underground Voyages of Michel Siffre
May 15, 2025
•
Alastair Williams
49
4
12
How Many Alien Civilizations Exist In Our Galaxy?
Nov 9, 2025
•
Alastair Williams
19
2
How Dust on the Ocean Floor Hints at a Recent Near-Earth Supernova
May 29, 2025
•
Alastair Williams
18
7
Great Observatories
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The Europa Clipper: Are There Oceans On The Second Moon of Jupiter?
On the Europa Clipper, the oceans of Europa and the possibility of life beyond Earth
Jun 17, 2025
•
Alastair Williams
19
1
6
How Gaia Mapped The Milky Way
On Gaia, the Tabula Rogeriana, and how we are building the first true map of our galaxy.
Mar 20, 2025
•
Alastair Williams
17
5
The Solar Probe: Time to Go Deeper Into the Sun Than Ever Before
On the solar probe, the Sun, and what it has told us.
Dec 22, 2024
•
Alastair Williams
2
1
Science and Astronomy
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How to Learn Physics for Free - 2026 Edition
A guide for the curious
Feb 3
•
Alastair Williams
22
4
7
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
22
8
6
The Debris of Creation: Hubble Watches Worlds Collide
On the discovery of violent collisions around Fomalhaut
Jan 22
•
Alastair Williams
21
1
6
Recent posts
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The Week in Space and Physics: Stars Beyond The Supermassive
On the most massive stars ever imagined, the launch of Artemis II, Cloud Nine, and the first private space station.
Jan 27
•
Alastair Williams
12
2
3
The World According to Aristotle
On the physics and philosophy of matter, the stars, and of motion
Jan 25
•
Alastair Williams
6
2
2
The Debris of Creation: Hubble Watches Worlds Collide
On the discovery of violent collisions around Fomalhaut
Jan 22
•
Alastair Williams
21
1
6
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