How gravity can seem repulsive (from a certain point of view)

*Insert Star Wars joke here* All forces in the universe are either attractive or repulsive. We know that gravity is a force that is always attractive. Unlike the electromagnetic force, a particle cannot be repelled by gravity *. But what if I told you that from the point of view of a comet or a planet orbiting […]

Inside the CPU – Instruction cycles

One of the most widely taught processes of a computer is the instruction cycle (fetch-decode-execute cycle), yet it seems to be one that causes a lot of headache with students. Instead of finding a way to memorise all the acronyms and orders, how about we clearly explain why each process happens, rather than simply what […]

PlanckTime Forum: What you need to know!

We are super excited to announce the PlanckTime Forum! At the moment we have sections for most areas of physics (quantum mechanics, relativity…) and also sections for maths and computer science. We will be expanding the forum to cater for all “physicsy” and “mathsy” needs to create our awesome online community. You will need to […]