Meteor - The streak of light produced when a meteoroid enters Earth's atmosphere and burns up., Meteorite - A meteoroid that survives its passage through the atmosphere and lands on Earth, Geocentric - An outdated model of the universe where Earth is at the center, and all celestial bodies orbit around it., Heliocentric - The model of the solar system where the Sun is at the center and planets orbit around it, Ellipse - A geometric figure shaped like an elongated circle, defined by two points called foci., Focus (plural: foci) - One of the two fixed points in an ellipse; essential in determining its shape., Major Axis - The longest diameter of an ellipse, passing through both foci., Kepler's Laws - Three fundamental laws describing the motion of planets around the sun, established by Johannes Kepler., Planetary Motion - The movement of celestial bodies in their respective orbits due to gravitational forces, Velocity - The speed of an object in a specific direction, important in understanding orbital motion., Tidally Locked - A condition where an astronomical body always shows the same face to the object it orbits, due to synchronous rotation and revolution periods., Umbra - The darkest part of a shadow, where the light source is completely blocked., Crescent - The phase of the Moon when less than half of its surface is illuminated., Gibbous - The phase of the Moon when more than half of its surface is illuminated, Phases - The different appearances of the Moon as observed from Earth, caused by its position relative to the Sun and Earth, Supermoon - A full moon that occurs when the Moon is at its closest point to Earth in its orbit, making it appear larger and brighter., Contracting - the process of becoming smaller or narrower, often due to gravitational forces in the context of celestial formation., Formation - The process by which a celestial body, such as a planet or moon, was created and developed., Celestial - Relating to the sky or outer space; often used to describe objects like stars, moons, and planets., Tides - The daily changes in the surface level of the Earth's oceans caused by gravitational pulls., Gravitational Pull - The force exerted by a celestial body, like the Moon or Sun, that affects the movement of water on Earth, Phenomenon - An observable event or occurrence, especially one that is remarkable or unusual., Spring Tides - The highest high tides and lowest low tides that occur during the full and new moon phases., Neap Tides - The tides that occur during the first and third quarter moon phases, characterized by a reduced tidal range., Rate of Change - The speed at which a variable, such as water level, changes over time., Perigee - The point in the orbit of the Moon or a satellite at which it is closest to the Earth., Apogee - The point in the orbit of the Moon or a satellite at which it is farthest from the Earth., Aphelion - The point in the orbit of a celestial body where it is farthest from the Sun., Perihelion - The point in the orbit of a celestial body where it is closest to the Sun., Equinox - A moment in time when the Sun is directly above the equator, resulting in equal day and night lengths.,

Unit 1 ES Vocab (Part 2)

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