Cosmic Background Radiation - The leftover energy from the Big Bang that fills the universe, detected as electromagnetic energy., Redshift - The phenomenon where light from objects moving away from the observer appears shifted toward longer wavelengths., Blueshift - The phenomenon where light from objects moving toward the observer appears shifted toward shorter wavelengths., Doppler Effect - The change in frequency or wavelength of a wave in relation to an observer moving relative to the source of the wave., Electromagnetic Energy - Energy that travels through space in the form of electromagnetic waves, including visible light, radio waves, and gamma rays., Matter - Anything that has mass and occupies space; the substance of which physical objects are made., Electromagnetic Radiation - Waves of energy that travel through space, which include various types like ultraviolet, visible light, and infrared., Nuclear Fusion - The process by which two light atomic nuclei combine to form a heavier nucleus, releasing a significant amount of energy, Luminosity - The total amount of energy emitted by a star per unit of time, often measured in watts, Mass - A measure of the amount of matter in an object, typically expressed in kilograms or solar masses when discussing stars., Main Sequence - The primary stage in a star's life cycle where it spends most of its life fusing hydrogen into helium in its core., Red Giant - A late stage in a star's life cycle when it has exhausted the hydrogen in its core and expands significantly., White Dwarf - The remnant core of a star that has exhausted all its nuclear fuel and has collapsed to a very small size., Stellar Evolution - The changes a star undergoes during its life cycle, from formation to death., Astronomer - A scientist who studies celestial bodies, such as stars and planets., Nucleosynthesis - The process by which new elements are formed by fusing smaller atomic nuclei together, Nebula - A large cloud of gas and dust in space, often the birthplace of stars., Gravity - The force that attracts two bodies towards each other, influencing the formation and evolution of stars., Fusion - The process where two light atomic nuclei combine to form a heavier nucleus, releasing energy., Supernova - A powerful and luminous explosion that occurs at the end of a star's life cycle., Core Collapse - A phenomenon where the core of a massive star collapses under its own gravity, often leading to a supernova., Revolution - The movement of Earth around the Sun, which takes approximately one year., Circumpolar - Referring to constellations that can be seen year-round and appear to move in a circular path around the celestial pole., Axis of Rotation - An imaginary line around which Earth spins, affecting the visibility of constellations, Orbit - The path that Earth takes as it moves around the Sun, Rotation - The act of spinning around an axis; for planets, it refers to how long it takes to complete one full turn., Terrestrial - Referring to planets that are rocky and solid, similar to Earth (e.g., Mercury, Venus, Earth, Mars)., Jovian - Referring to gas giant planets that are large and primarily made up of gases (e.g., Jupiter, Saturn, Uranus, Neptune)., Eccentricity - A measure of how much an orbit deviates from a perfect circle; ranges from 0 (circular) to 1 (linear)., Comet - An icy celestial object that, when close to the Sun, develops a glowing coma and often a tail due to the sublimation of its ice.,

Unit 1 Vocab

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