celestial

Celestial means "of or relating to the sky or the heavens." It is often used to describe objects in space, such as stars, planets, and galaxies. In the context of science, celestial objects are those that exist outside of Earth's atmosphere.

The word "celestial" comes from the Latin word "caelestis," which means "heavenly." Celestial objects are often seen as being beautiful and mysterious. They have inspired people for centuries, and they continue to be a source of wonder and awe.

Celestial objects are a fascinating and important part of our universe. They help us to understand the origins of life and the evolution of the cosmos.

Here are some examples of celestial objects:

• Stars: Stars are giant balls of gas that burn brightly in the sky. They are the main source of light and heat in the solar system.
• Planets: Planets are large bodies that orbit stars. They are made up of rock and gas, and they can have moons.
• Galaxies: Galaxies are giant collections of stars, gas, and dust. There are billions of galaxies in the universe.
• Nebulae: Nebulae are clouds of gas and dust that can give birth to new stars.
• Comets: Comets are icy bodies that orbit the sun. They can have long tails that can stretch for millions of miles.
• Asteroids: Asteroids are rocky bodies that orbit the sun. They can range in size from a few feet to hundreds of miles across.
• Black holes: Black holes are regions of space where gravity is so strong that not even light can escape.

Celestial objects are a vast and complex subject, and there is still much that we do not know about them. However, they continue to be a source of fascination and wonder for people of all ages.

The celestial sphere is an imaginary sphere that surrounds the Earth and on which the stars are projected.