Click here for a demonstration of two things: -
That you can sail using light, and..
That memory can be unreliable, even when you are sure.
The interesting aspect of this is that some of the lighter stars can reach "escape velocity", flying right out of the cluster, and astronomers call this process "Evaporation", a term also applied to the loss of lighter gases from a planet, such as hydrogen and helium from the Earth - some molecules of sufficiently light gases at the top of the atmosphere will exceed the escape velocity of the planet and be lost.
I find it an awesome concept, that a similar process to what leads to that dry brown ring in the bottom of a finished coffee, is happening to stars in a cluster, and even to galaxies in a cluster of galaxies.
Ref. the page on Mass Segregation at Wikipedia for a fuller description of this phenomenon.
No point in me duplicating this article.
Today, something made me have a look. As is common with astrophysics, the answer was "it depends...." on what you define as a thing: "Consider the regions around supermassive black holes. Within our own galaxy, things are pretty quiet, but around actively feeding black holes, there can be disks of material with such temperature and density that they act like the core of a star, fusing hydrogen into helium. Which, purely based on high volumetric density of pure awesome, I’m going to call a thing. An accretion disk around a quasar could be light days across, extending well past the orbit of Pluto and killing us all, if you dumped it in our Solar System."
That is pretty big, however what struck me was the statement "...around actively feeding black holes, there can be disks of material with such temperature and density that they act like the core of a star, fusing hydrogen into helium."
Over all, a good varied collection of interest to any reader.
Read as an e-book borrowed from Auckland Libraries via Overdrive, on my Kobo Touch e-reader.
Read as an e-book borrowed from Auckland Libraries via Overdrive, on my Kobo Touch e-reader
The ANSWER is: (23.4 + 1.25) x 2 = 49.3 degrees
I am an extremely intelligent, witty and fascinating guy.