Universe

The universe is vast, mysterious, and full of wonders—from stars and planets to invisible forces we can barely comprehend. But what exactly is it made of? Modern astrophysics tells us…

Mercury is the closest planet to the Sun and the smallest in our solar system. Despite its proximity to the Sun, it's not the hottest planet—Venus holds that title. However,…

Theia is a hypothetical ancient planetary body believed to have collided with Earth over 4 billion years ago. While Theia no longer exists as a separate planet, scientists suggest that…

At first glance, it might seem logical to assume that the Moon should eventually fall to Earth due to gravity. After all, gravity pulls objects toward each other—and the Earth…

The Moon is Earth’s only natural satellite, orbiting our planet at an average distance of about 384,400 kilometers. It is the fifth-largest moon in the solar system and the second-densest,…

Stars are massive, glowing spheres of hot gas — primarily hydrogen and helium — that produce energy through nuclear fusion. They vary greatly in size, color, temperature, brightness, and lifespan.…

The Crab Nebula (cataloged as Messier 1 or M1) is one of the most studied and iconic objects in the night sky. Located about 6,500 light-years away in the constellation…

The Sun goes through regular cycles of activity known as solar cycles, each lasting about 11 years. The most energetic phase of this cycle is called solar maximum, or peak…