One of the underlying ideas in Einstein’s general relativity is that for an observer, the acceleration due to gravity, or the acceleration due to thrust, are identical. This is a consequence of the equivalence principle. This phenomenon is the way to achieve artificial gravity in
Space is big. The Voyager probe, launched in 1977 to explore Jupiter and Saturn, took 36 years to leave the Solar System. It is the furthest human object from us, and it is still in our neighbourhood. Even the radio waves we sent into space
We were planning a happy and light Christmassy episode but since we were looking at 2016, the conversation soon took a turn for the worst. We talked about penguins, Brexit, conducting putty, special snowflakes, the star of Bethlem, and Rudolph’s problems!
One of my biggest pet peeves about sci-fi universe building is the lazy approach in building alien civilisations. We often see the trope showing one world, one climate, and one language. Given the variety that our planet has to offer under any aspect it is
Black holes are incredibly fascinating. They represent the unknown, the dangerous, the terrifyingly majestic. They are the modern version of the void, the abyss, the bottomless pit. Most sci-fi gets black holes right, but poetic license ignores the facts at times, and takes over to
According to the World Health Organization, 360 million people worldwide have disabling hearing loss. For the remaining 95% of the population, sound is a cardinal part of our sensory experience. It allows us to communicate easily, and to better experience the natural world. So how
This documentary explores the tumultuous lives of galaxies with a focus on galaxy collision: the key mechanism in galaxy evolution. Using publicly available images and bespoke animations, we look at how humans began exploring what lies beyond the Milky Way, how the Universe came to
A cool thing to do if you have leftover dry ice is to snuff out candles using just carbon dioxide. You put dry ice in a jar and let it sublimate. The carbon dioxide will remain in the jug, as the density of CO2 is
We are back with Russell Moul to look again at the creepy and weird side of Science. From embalming to proton beams, from cryogenics to voltaic piles ending in the cost of our progress and prosperity. Happy Halloween!
Planetary systems form from the same cloud as its parent star. As the cloud contracts under the effect of gravity, the gas acquires more angular velocity. Spinning faster it flattens out into a disk where eventually planets end up forming. This simplistic approach has been