Edexcel IGCSE Physics 復習筆記 8.2.5 Hertzsprung-Russell Diagrams Hertzsprung-Russell Diagrams Stars are classified using the Hertzsprung-Russell (HR) diagram This is a plot of: The?luminosi...
Edexcel IGCSE Physics 復習筆記 8.2.4 The Brightness of Stars Absolute Magnitude Astronomers measure the brightness of stars at a standard distance using the?absolute?magnitude scale This is ...
Euler's Method: Second Order How do I apply Euler’s method to second order differential equations? A?second order differential equation?is a differential equation containing one or more second deri...
Edexcel IGCSE Physics 復習筆記 8.2.3 The Life Cycle of Larger Stars The Life Cycle of Larger Stars A?large star?is one that is much?larger?than the?Sun Stars that are larger than the Sun hav...
Edexcel IGCSE Physics 復習筆記 8.2.2 The Life Cycle of Solar Mass Stars The Life Cycle of Solar Mass Stars 1. Nebula All stars form from a giant cloud of?hydrogen gas?and?dust?called a?nebul...
Edexcel IGCSE Physics 復習筆記 8.2.1 Classification of Stars Classification of Stars Stars come in a wide range of sizes and colours, from yellow stars to red dwarfs, from blue giants to red...
Edexcel IGCSE Physics 復習筆記 8.1.4 Orbital Period Calculating Orbital Period When planets move around the Sun, or a moon moves around a planet, they orbit in?circular motion This means tha...
Edexcel IGCSE Physics 復習筆記 8.1.3 Orbital Motion Orbital Motion There are many orbiting objects in our solar system and they each orbit a different type of planetary body Orbiting ...
Edexcel IGCSE Physics 復習筆記 8.1.2 Gravitational Field Strength Gravitational Field Strength The strength of gravity on different planets after an object's weight on that planet Weight is ...
