Origins of the Universe and Solar System

These flashcards cover key vocabulary related to the origins of the universe and the solar system as discussed in the lecture.

Big Bang Theory

The leading explanation of how the universe began, stating that it started from a dark, dense state and expanded from a big explosion approximately 13.7 billion years ago.

Nebular Hypothesis

The theory that the sun and planets formed from the same rotating cloud of interstellar gases, known as a nebula.

Nucleosynthesis

The process of forming new elements through fusion in the sun and other stars.

Cosmic Microwave Background Radiation

Radiation that is considered evidence supporting the Big Bang Theory, detected by scientists studying the universe.

Kuiper Belt

The region beyond the planetary orbits that contains comets, asteroids, and other celestial bodies.

Terrestrial Planets

The four inner planets (Mercury, Venus, Earth, Mars) characterized by rocky compositions, dense structures, and solid surfaces.

Jovian/Giant Planets

The outer planets (Jupiter, Saturn, Uranus, Neptune) that are less dense, primarily gaseous, and possess ring systems.

Mercury

The innermost planet, known for its extreme conditions and similarity to the Moon, making it the smallest major planet.

Venus

Earth's twin, known for its thick atmosphere made of greenhouse gases that makes it the hottest planet.

Mars

Known as the red planet due to iron oxide, it may have seasonal patterns and polar caps indicative of past water.

Jupiter

The largest planet in the solar system, classified as a gas giant with a dense atmosphere and a substantial number of moons.

Saturn

Characterized by its extensive ring system and many moons, it is the second largest planet in the solar system.

Uranus

Notable for its blue-green color and rotation on its side, it has an extensive system of moons and rings.

Neptune

The outermost planet, recognized for its high-speed winds and blue color caused by an unidentified atmospheric gas.

Kuiper Belt

A region beyond Neptune consisting of icy small bodies and asteroids seen as leftover debris from planet formation.