A star is a massive, luminous sphere of plasma held together by gravity. It is composed mostly of hydrogen and helium, and produces light and heat through nuclear reactions in its core.
There are different types of stars based on their size, temperature, and color. The main types include:
Stars go through a life cycle that includes formation, main sequence stage, and eventual death, which can result in the formation of other celestial bodies like black holes or neutron stars.
If you want to observe stars in the night sky, here are some tips:
The nearest star to Earth is the Sun, which is essential for life on our planet.