Month: July 2025

ACCRETION – The process by which dust and gas come together to form larger bodies, eventually leading to the formation of planets.

PROTOPLANETARY DISK – A rotating disk of dense gas and dust around a newly formed star, from which planets are formed.

NEBULAR HYPOTHESIS – A theory that suggests the solar system formed from the gravitational collapse of a giant molecular cloud, with the Sun forming at the center and planets forming from the surrounding material.

DARK ENERGY – The unknown force causing the acceleration of universal expansion.

HUBBLE’S LAW – The observation that galaxies are moving away, implying cosmic expansion.

BIG BANG THEORY – The leading explanation for the origin of the universe.

ESCAPE TRAJECTORY – A path that allows an object to break free of a planet’s gravity.

LOW EARTH ORBIT (LEO) – A region where satellites orbit at altitudes below 2,000 km.