Star Brightness and Size
4th Grade · Science · 35 min· Ngss 4-ess3-1
Lesson Preview
Learning Objective
I can compare the brightness and size of different stars.
- 1
Stars create energy in their core through a process called nuclear fusion, where hydrogen molecules smash together to create helium.
- 2
Luminosity is a star's true brightness, measuring how much energy it shines from its surface, while apparent brightness is how bright a star appears from Earth.
- 3
A star's apparent brightness depends on its distance from Earth, not just its size or power, because closer stars appear brighter.
