Quizlet #1:  Structure and Scale of Universe

• Light Years (NASA)
• Astronomical Unit  Wikipedia
• The Solar System, and objects in it
• What is the Universe?
• Planets, Oort Cloud, Etc. (wikipedia pictures)
• Kuiper Belt and Oort Cloud
• Proxima Centauri, a dim, long-lived red dwarf  travel time  another travel time article
• Local group of Galaxies
• Virgo Supercluster
• Laniakea Supercluster

Quizlet #2:  Planets and Other Rocks orbiting the Sun

• Mnemonic devices for remember the planets in order
• Good pictures of the solar system
• Some differences between the Inner and Outer Planets
• Why are the inner planets called "terrestrial planets?"
• What does jovian mean?
• Ring Systems
• Asteroids, Meteoroids, Meteors, Meteorites
• Asteroid Belt
• Meteor Shower Video

Quizlet #3:  Satellites, Moons, Comets, and Orbits:

• pHet Gravity and Orbits Simulation
• satellites
• comets -- scroll down to kid friendly version
• NASA comet picture gallery
• Comet Nishimura -- closest to Earth on September 12, 2023

Quizlet #4:  The Sun and Other Stars

• What color is the sun -- really?
• Nuclear Fusion
• Why does the Sun shine? 
• Why does the Sun really shine?
• Solar cycles, sunspots, solar flares & CMEs
• Space weather (due to the Sun)
• Types of stars (ways stars can differ)
  • HR diagram animation 1 -- sorting stars
  • Hr diagram animation 2 -- path of a star like our Sun (but not at the right speed)
• Astrology vs astronomy
• Circumpolar Constellations in the Northern Hemisphere
• Asterisms vs Constellations
• Some constellations near The Big Dipper
• Some constellations near Orion
• A good look at Orion and Betelgeuse
• How to tell time using the Big Dipper

Quizlet #5:  Beyond the Solar System

• Hubble Telescope photos of galaxies  Photo of Hubble Telescope
• Galaxy shapes
• Why was our galaxy named the Milky Way? 
• Our future collision with the Andromeda Galaxy, and its effect on our night sky (in 7 billion years).
• Can we see stars outside the our Galaxy (outside the Milky Way)?
• Supernovae
• Nebulae
• Black holes -- gravitational lensing and structure

Not part of a class, but interesting...

• The NASA "space place"  Click on the Sun, Solar System, and Universe Squares.