Big Bang
The Big Bang is the prevailing cosmological model that describes the origin and evolution of the universe. According to this…
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Light-Year A Cosmic Unit of Distance
A light-year is a unit of length used to measure astronomical distances. It is defined as the distance that light…
Orbits The Paths of Celestial Bodies
An orbit is the path that one celestial body takes around another. In our solar system, planets orbit the Sun,…
Gravity The Force That Holds Us Down
Gravity is a fundamental force of nature that attracts objects towards each other. It is responsible for the Earth’s orbit…
Astronauts Pioneers of Space
Astronauts are individuals who have trained and qualified to travel into space. They are explorers who have pushed the boundaries…
Spacecraft Our Vehicles to the Cosmos
Spacecraft are vehicles designed to operate in space. They come in a variety of shapes, sizes, and capabilities, and have…
Nebulae Cosmic Clouds of Gas and Dust
Nebulae are vast clouds of gas and dust that exist in interstellar space. They are the birthplaces of stars and…
Galaxies Islands of Stars
Galaxies are massive collections of stars, gas, dust, and dark matter. They are the fundamental building blocks of the universe.…
Comets Icy Wanderers of the Solar System
Comets are small, icy bodies that orbit the Sun. They are often referred to as “dirty snowballs” because they are…
Asteroids The Rocky Remnants of Our Solar System
Asteroids are small, rocky objects that orbit the Sun. They are also known as minor planets. Most asteroids are found…
Moons Earth’s Only Natural Satellite and Beyond
Moons are natural satellites that orbit planets. They come in a wide variety of sizes, compositions, and distances from their…
Planets The Building Blocks of Our Solar System
Planets are celestial bodies that orbit a star. They are typically composed of rock, gas, or a combination of both.…