Archive for August 6th, 2017

Hacker-Proof Wireless Security


(Non Sequitur) – Wiley Miller:

Klick klick klika klik-klik ding” …

Non Sequitur 2017-08-06

Wiley Miller: Non Sequitur 2017-08-06: Hacker-Proof Wireless Security


How Big is the Biggest Possible Planet?


(Discover Blogs::Out There) – Corey S. Powell:

There are two ways to come at the question, depending on what you mean by “big.” If you think of the size of a planet in terms of mass, then there is a specific but rather technical answer. Planets are defined as bodies that do not generate their own energy from nuclear fusion. Any planet more than about 13 times the mass of Jupiter (4,o00 Earth masses, roughly) generates enough heat and pressure in its core to trigger limited fusion reactions of deuterium, a heavy isotope of hydrogen. At that point, the object is considered a brown dwarf instead of a planet. …

But there’s also a more literal take on the question: Is there a limit on how physically large a planet can be? Here there is a definite and rather surprising answer. Jupiter is 11 times the diameter of Earth, and it turns out that is about as large as any planet can be! If you kept dumping more matter on Jupiter, it would not get any larger. Instead, gravity would crush its mass together more tightly and efficiently. …

outthere 2017/08/04 how-big

Dwarf stars in comparison to Jupiter