space – A bit of maths and physics

Spaces and dimensions

2020-09-192020-07-18 by KJ Runia

What do mathematicians and physicists mean with phrases like higher and/or extra dimensions? Let’s travel through a Universe of spaces and dimensions!

Einstein’s special relativity in under 6.999 minutes for people on the move

2020-07-022019-08-18 by KJ Runia

Especially for people on the move, we discuss as briefly as possible the intricacies of Einstein’s special relativity.

The Eagle has landed

2020-07-022019-07-20 by KJ Runia

Astronaut Buzz Aldrin, lunar module pilot, walks on the surface of the Moon near the leg of the Lunar Module (LM) "Eagle" during the Apollo 11 exravehicular activity (EVA). Astronaut Neil A. Armstrong, commander, took this photograph with a 70mm lunar surface camera. While astronauts Armstrong and Aldrin descended in the Lunar Module (LM) "Eagle" to explore the Sea of Tranquility region of the Moon, astronaut Michael Collins, command module pilot, remained with the Command and Service Modules (CSM) "Columbia" in lunar orbit.

We celebrate our 50th lunar anniversary. On this day, the Eagle landed.

Deriving the Lorentz transformations from a rotation of frames of reference about their origin with real time Wick-rotated to imaginary time

2022-02-172018-12-20 by KJ Runia

Well-known for their central role in Einstein’s Special Relativity, the Lorentz transformations are derived from the rotation of two frames of reference in standard configuration while time is taken to be an imaginary unit of spacetime. This is rarely seen in the wild. Not many undergraduate textbooks or online texts show the details of the working. Hence, this article.