Embedded Files
Topic 6: Space physics
Topic 6: Space physics
The sun
The sun
Introduction
Introduction
The Sun is our closest star and plays a crucial role in providing the energy needed for life on Earth. Understanding its composition, the type of energy it emits, and the process that powers it helps us appreciate both its importance and the science behind its operation.
The sun as a star
The sun as a star
The Sun is a star of medium size compared to other stars in the universe. It is not the largest, nor is it the smallest; it falls into the main sequence category, which means it is in a stable phase of its lifecycle.
Composition:
The Sun consists mostly of hydrogen (about 75%) and helium (about 24%). The remaining 1% is made up of heavier elements such as carbon, oxygen, and other trace elements.
Energy Radiation:
The Sun radiates most of its energy in three regions of the electromagnetic spectrum:
Infrared Radiation (IR): This radiation is responsible for the heat we feel from sunlight.
Visible Light: This is the light that allows us to see. The Sun is the most significant natural source of visible light.
Ultraviolet Radiation (UV): The Sun also emits ultraviolet rays, which are responsible for causing tanning and, in excess, sunburn.
Podcast
Podcast
Quiz
Quiz
Page updated
Google Sites
Report abuse