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*[[Nuclear Fusion]]
*[[Rest Mass Energy]]
==Space Physics==
===Solar system; stability of orbital motions; satellites===
*[[Gravity]]
**[[Weight]]
**[[Gravitational Field Strength]]
**[[Gravity#Orbits|Gravity and the Planets]]
**[[Newton's Universal Theory of Gravitation]]
**[[Orbit]] - constant speed, changing v. Eliptical changing speed. Higher
*[[The Solar System]]
**[[The Sun]]
**[[Planet]]
**[[Dwarf Planet]]
**[[Satellite]]
***[[Artificial Satellite]]
**[[Moon]]
***[[The Moon]]
**[[Earth]]
*[[Lifecycle of a Star]]
*[[Star]]s
**[[Low Mass Star]]
***[[Nebula]]
***[[Protostar]]
***[[Main Sequence Star]]
***[[Red Giant]]
***[[White Dwarf]]
***[[Black Dwarf]]
**[[High Mass Star]]
***[[Nebula]]
***[[Protostar]]
***[[Main Sequence Star]]
***[[Red Super Giant]]
***[[Super Nova]]
***[[Neutron Star]]
***[[Black Hole]]
===Red-shift as sources move away; the ‘big bang’ and universal expansion===
*[[Galaxy]]
*[[Universe]]
*[[Light Year]]
*[[Doppler Effect]]
**[[Red Shift]]
**[[Blue Shift]]
*[[Big Bang Theory]]
*[[Steady State Theory]]