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The universe primarily consists of dark energy (68%), dark matter (27%), and ordinary matter (5%), which includes stars, planets, and everything we can directly observe.
There are eight recognized planets in our solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Pluto is classified as a dwarf planet.
A black hole is a region in spacetime where gravity is so strong that nothing, not even light, can escape. They typically form from the remnants of massive stars after a supernova.
The Artemis program aims to return humans to the Moon, establish a sustainable lunar presence, and prepare for future human missions to Mars.