Flashcards - More on the Solar System
General Instructions
Work individually to create flashcards for study purposes for the upcoming summative assessment.
Definitions and Key Concepts
Natural Satellites: Natural satellites are celestial bodies that orbit around a planet. Moons are a type of natural satellite.
Moon Details
Distance from Earth: The Moon is approximately 384,400 kilometers away from the Earth.
Dark Sections of the Moon: The dark sections of the Moon are referred to as maria.
Definition: Maria are flat plains formed by ancient volcanic eruptions.
Distinction: They can be distinguished from craters by their smoother appearance.
Revolution and Rotation Period: The Moon takes about 27.3 days to complete one revolution around the Earth and to rotate once on its axis.
Tidal Locking
Tidal Locking: The Moon is tidally locked to the Earth, which means that only one side of the Moon is visible from Earth.
Explanation: This phenomenon occurs because the rotation period of the Moon is equal to its revolution period around Earth.
Mars and Its Moons
Mars' Moons: Mars has two moons, which are named Phobos and Deimos.
Recent Mars Mission:
Mission Name: Perseverance Rover
Launch Year: 2020
Significance: It carried the first helicopter to fly on another planet.
Jupiter's Moons
Galilean Moons: Jupiter has four significant moons known as the Galilean moons: Io, Europa, Ganymede, and Callisto.
Jupiter Exploration
Recent Mission to Jupiter: The most recent mission to study Jupiter is the Juno mission.
Launch Date: August 5, 2011
Arrival Date: Juno arrived at Jupiter on July 4, 2016.
Key Findings:
Discovery of a deep atmospheric circulation pattern.
Detection of a magnetic field that is significantly stronger than anticipated.
Saturn’s Rings and Moons
Composition of Saturn's Rings: Saturn's rings consist of billions of ice particles, which vary in size from tiny grains to large chunks.
Shepherd Moons:
Definition: Shepherd moons are small moons that orbit near the edges of a planetary ring.
Function: They maintain the shape and structure of the rings by exerting gravitational forces, thereby preventing particles from spreading or clumping together.
Number of Moons: Saturn has 82 known moons.
Important Moons of Saturn
Moon Name | Importance |
|---|---|
Enceladus | It ejects ice through geysers, contributing to Saturn's E ring. |
Titan | It has surface oceans of liquid methane and is the only other body in the solar system with a liquid cycle. |
Neptune’s Moons
Number of Moons: Neptune has 14 known moons.
Famous Moon:
Name: Triton
Unique Feature: Triton is noteworthy as it is the only moon in our solar system that orbits in the opposite direction of its planet's rotation.
The Asteroid Belt
Location: The Asteroid Belt is situated between Mars and Jupiter.
Ceres
Reclassification: Ceres is classified as a dwarf planet rather than an asteroid.
Asteroid Facts
Largest Asteroid: The largest asteroid is Vesta, measuring 525 kilometers in diameter.
Mission to the Asteroid Belt: The Dawn mission visited the asteroid belt in 2007.
Kuiper Belt
Definition: The Kuiper Belt is a region of the solar system filled with icy bodies and asteroids, situated beyond Neptune's orbit.
Main Dwarf Planets: The primary dwarf planets studied in the Kuiper Belt include Pluto, Eris, Haumea, and Makemake.
Kuiper Belt Mission:
Mission Name: New Horizons
Launch Year: 2006
Arrival Year: 2015
Pluto's Reclassification
Criteria for Planet Classification:
An object must:
Have a spherical shape.
Orbit a star.
Be the largest object in its orbit.
Pluto's Status: Pluto is reclassified as a dwarf planet because its orbit crosses Neptune's path, thus failing to be the largest object in its orbit.
Order of Celestial Objects
Correct Order: Sun, Planets, Asteroid Belt (between Mars and Jupiter), Earth’s Moon, Dwarf Planets (Pluto and others in the Kuiper Belt).