Artificial gravity is a concept that is ubiquitous in our science fiction yet elusive in our space program. Why is this? And how could we develop artificial gravity soon? In a Cool Worlds special, this video essay goes in depth on the topic discussing why centrifuges are the most plausible solution and early ideas on the topic. Join us a journey from Einstein’s equivalence principle, to O’Neill Cylinders and Stanford Tori; from Coriolis forces to near-term experiments. Grab a cup of a tea and enjoy.

New Rockets coming our way! The question is … when?

Want an article version of this video? Here you go! https://everydayastronaut.com/abort-t… There’s a new trend going around in the commercial space industry when it comes to launch abort systems. All three commercial companies who are putting abort systems on their crewed vehicles have ditched the classic launch abort tower we’ve seen dominate abort systems in the past. Previous vehicles like the Mercury capsule, the Apollo capsule and even the Soyuz all used an escape tower that sat on top of the crew module, capable of pulling the vehicle away from a failing rocket in a hurry. And to make this topic even more interesting, we’re seeing another trend in abort systems… SpaceX’s Crew Dragon and Boeing’s Starliner capsules both are using liquid fueled abort motors instead of solid rocket motors. So today we’re going to talk about the design considerations that have made SpaceX, Boeing and Blue Origin ditch abort towers on their crewed vehicles and we’re also going to evaluate why the heck Boeing and SpaceX are going with liquid motors instead of solid motors. And with both Boeing and SpaceX having experienced serious setbacks and complications with their liquid fueled abort systems, including the loss of a test vehicle, it raises the question… is it even a good idea?….

Check out Grant’s channel: 3blue1brown: https://www.youtube.com/3blue1brown This video recounts a lecture by Richard Feynman giving an elementary demonstration of why planets orbit in ellipses. See the excellent book by Judith and David Goodstein, “Feynman’s lost lecture”, for the full story behind this lecture, and a deeper dive into its content. Tweet referenced at the start: https://twitter.com/3blue1brown/statu… Music by Nathaniel Schroeder: https://soundcloud.com/drschroeder/el… Music by Vincent Rubinetti: https://soundcloud.com/vincerubinetti… Support MinutePhysics on Patreon! http://www.patreon.com/minutephysics Link to Patreon Supporters: http://www.minutephysics.com/supporters/ MinutePhysics is on twitter – @minutephysics And facebook – http://facebook.com/minutephysics And Google+ (does anyone use this any more?) – http://bit.ly/qzEwc6

In 1998 two teams traced back the expansion of the universe over billions of years and discovered that it was accelerating. It was a startling discovery that suggests that more than 70 per cent of the cosmos is contained in a previously unknown form of matter, called Dark Energy. In this video, Brian Schmidt, leader of the High-Redshift Supernova Search Team, describes this discovery and explains how astronomers have used observations to trace our universe’s history back more than 13 billion years, leading them to ponder the ultimate fate of the cosmos. Brian’s work on the accelerating universe was awarded the 2011 Nobel Prize in Physics, jointly with Adam Riess and Saul Perlmutter.

Featuring 3Blue1Brown Watch the 2nd video on 3Blue1Brown here: https://www.youtube.com/watch?v=MzRCD…

In 2015, NASA’s New Horizons space probe whizzed by Pluto. Now it has sent back all of its data, what did it see and discover? https://brilliant.org/astrum/ In this video, I showcase the journey New Horizons took in order to get to Pluto, its moons, geological features, and Pluto’s atmosphere.

Our Solar System, and all other star systems, form from a collapsing nebula. Often called stellar nurseries, nebulae are the birthplace of stars. They are made up of mostly hydrogen but also contain other matter like gases, dust, ice and rock. The gravity of the nebula pulls this matter into the centre, and the nebula experiences a gravitational collapse. If the compression raises the core temperature enough to reach thermonuclear fusion, the centre mass generates a protostar. This process takes about 10 million years

In this lecture, he makes the case that we each inhabit a story, describing where we are, where we are going, and the actions we must undertake to get from the former to the latter. These inhabited stories are predicated on an underlying value system (as we must want to be where we are going more than we value where we are). In addition, they are frames of reference, allowing us to perceive (things that move us along; things that get in our way), make most of the world irrelevant (things that have no bearing on our current frame), and determine emotional significance (positive: things that move us along; negative: things that get in our way).