Astronomers have used accurate timing of pulsar signals to determine the mass of a tiny neutron star and its white dwarf companion, showing that the neutron star is the most massive ever identified. However this is more than an exercise in finding new record holders, neutron stars are held up from collapsing into a black hole by quantum mechanics and nuclear physics, and these extreme conditions are at the limits of our theoretical understanding. So finding the upper mass limit of neutron stars gives important information on the conditions inside nuclear matter. ... https://www.youtube.com/watch?v=HCaKwnSES7k

In its 18 year history SpaceX has developed a lot of concepts on paper which never made it to flight, or, were never made to work. Either way the company has a rich history of projects that seemed like a good idea at the time but fell out of favour due to difficulties with engineering, a dearth of time, or a lack of a customer wanting to pay the cost. ... https://www.youtube.com/watch?v=KOiEwXF4ZC4

After the livestream I had some cleaning up to do and enough spare fuel to rescue the Buran stranded in polar orbit. ... https://www.youtube.com/watch?v=PoBn-9dto4U

Second Stage engine fails at ignition, and the engineering camera is also lost suggesting something violent enough to cause damage beyond the combustion chamber. https://www.rocketlabusa.com/missions/completed-missions/ ... https://www.youtube.com/watch?v=07bs3cT6tYY