Galileo's puzzling triple planet
Chapter 1

The frozen debris field

Chapter 2

Deciphering the optical illusion

Chapter 3

The cosmic traffic controllers

Chapter 4

A temporary cosmic masterpiece

YOUR GOAL

Master of The secret life of Saturn's rings

Ch 2 · Deciphering the optical illusion
artiteacher

artiteacher James Clerk Maxwell proves the pieces

Jul 11

artiteacher

artiteacher Deciphering the optical illusion

They look like solid silver bands shining in the night, But billions of icy particles are dancing in the light.

Jul 10

artiteacher

artiteacher Giovanni Cassini finds the gap

Jul 11

artiteacher
Giovanni Cassini finds the gap

artiteacher In 1675, astronomer Giovanni Domenico Cassini discovered a massive dark gap dividing Saturn's rings into two distinct major sections.

Jul 10

artiteacher
Christiaan Huygens solves the riddle

artiteacher In 1655, Dutch astronomer Christiaan Huygens used a vastly improved telescope to correctly identify that Saturn was surrounded by a flat, unattached ring.

Jul 10

artiteacher
Saturn's Ring Riddle
BETA

artiteacher Decode the ring riddle to discover what Saturn's rings are really made of.

Jul 10

artiteacher
Fun Fact

Galileo's confusion: When Saturn's rings temporarily disappeared in 1612, Galileo wondered if the planet had eaten its own children.

Jul 10

artiteacher
Glossary
ring (noun)
A circular band, typically of metal, worn on a finger as jewelry. In 1655, Christiaan Huygens discovered that Saturn's mysterious ears were actually a flat, detached ring.

Jul 10

artiteacher
Gossip

Which historical astronomer would you stargaze with?

Jul 10

artiteacher
Quiz

What rare astronomical alignment in 1612 caused Saturn's rings to temporarily 'disappear' from Galileo's telescope view?

Jul 10

artiteacher

artiteacher Christiaan Huygens solves the riddle

Jul 11

artiteacher
Quiz

In 1655, which Dutch astronomer correctly proposed that Saturn was surrounded by a flat, unattached ring?

Jul 10

artiteacher

artiteacher Galileo's puzzling triple planet

Jul 11

artiteacher
Quiz

What did Galileo Galilei mistakenly believe he was looking at when he first observed Saturn in 1610?

Jul 10

artiteacher
Quiz

What did Giovanni Domenico Cassini observe in 1675 that proved Saturn's rings were not one continuous, solid sheet?

Jul 10

artiteacher
Quiz

Before the invention of the telescope, how did ancient skywatchers classify Saturn?

Jul 10

artiteacher
Quiz

Which famous physicist mathematically proved in 1859 that Saturn's rings must be composed of tiny, independent particles?

Jul 10

artiteacher
Quiz

Which space agency collaborated with NASA to build the Huygens probe that landed on Saturn's moon Titan?

Jul 10

artiteacher
Quiz

What is the name of the prominent 4,800-kilometer-wide gap in Saturn's rings discovered in 1675?

Jul 10