astronomy

Astronomy is the scientific study of everything beyond Earth's atmosphere, including stars, planets, and galaxies. It uses physics and chemistry to explain the origins and evolution of the entire universe we observe today.

Astrophysics applies the laws of physics to understand how celestial objects function. It connects the microscopic world of atoms to the massive scale of stars, revealing how nuclear fusion powers the light we see in the sky.

Stellar nucleosynthesis is the process where stars create heavier elements. Inside their cores, stars fuse hydrogen into helium, eventually forging elements like carbon and iron that form the building blocks of life.

Supernovae are the explosive deaths of massive stars. These events release enough energy to briefly outshine entire galaxies and scatter the heavy elements created in the star's core across the vastness of space.

Nebulae are massive clouds of dust and gas in space. They often serve as stellar nurseries, where gravity pulls material together until the density becomes high enough to ignite a new star.

Exoplanets are worlds orbiting stars outside our solar system. Astronomers detect them by measuring the slight dip in a star's brightness as a planet passes in front, a method known as the transit technique.

Cosmic background radiation is the faint afterglow of the Big Bang. It fills the entire universe as a uniform microwave signal, providing a snapshot of the cosmos as it existed only 380,000 years after its beginning.

Dark matter is an invisible substance that does not emit light. We know it exists because its gravity affects how galaxies rotate, suggesting it makes up most of the matter in the universe.

Black holes are regions where gravity is so intense that nothing, not even light, can escape. They form when massive stars collapse under their own weight, creating a point of infinite density called a singularity.

Every atom in your body, except for hydrogen, was forged inside the heart of a star. You are literally made of stardust, recycled through the universe over billions of years to become the person you are today.