Astronomy notes
69 notes on the Moon, planets, stars, constellations and star signs, written for wizarding-school roleplay. Each one has a teaching tip for professors.
Search, filter and quiz these notes
A pale, milky stone. It is ground to a powder for calming potions and love potions.
- Powdered moonstone goes into the Draught of Peace.
- It must be added in exactly the right amount.
- It is a stone, so it keeps for years in a dry jar.
Teaching tip: Link it to the Moon notes. Ask why a stone named for the Moon might be thought calming.
Also on: Potions
In astrology, each planet stands for a part of life.
- The Sun is the self, and the Moon is feelings.
- Mercury is talk and learning, Venus is love and beauty, and Mars is courage and conflict.
- Jupiter is luck and growth, and Saturn is duty and limits.
- Astronomy tells you where a planet is. Astrology claims to tell you what that means.
Teaching tip: Give each student a planet and have them invent a prediction in its style. The class guesses which planet they had.
Also on: Divination
Every star sign has a ruling planet. Traditional and modern astrology agree on nine signs and differ on three.
- Traditional astrology uses the seven lights you can see without a telescope: the Sun, the Moon, Mercury, Venus, Mars, Jupiter and Saturn.
- Modern astrology added Uranus, Neptune and Pluto after they were discovered.
- Scorpio: Mars in the traditional system, Pluto in the modern one.
- Aquarius: Saturn in the traditional system, Uranus in the modern one.
- Pisces: Jupiter in the traditional system, Neptune in the modern one.
- The other nine signs keep the same ruler in both systems.
“Old charts stop at Saturn. New ones go all the way out to Pluto.”
Teaching tip: Ask why the old system has only seven rulers. Students should work out that nobody could see Uranus, Neptune or Pluto without a telescope. Then ask whether Pluto should still count, now that astronomers call it a dwarf planet.
Also on: Divination
The first sign of the zodiac, for birthdays from about 21 March to 19 April.
- Element: fire. Ruling planet: Mars.
- Astrologers say Aries people are bold, quick to act and fond of going first.
- In the sky, Aries is a small constellation. Its brightest star is Hamal.
Teaching tip: Ask students born under a fire sign to say whether the bold description fits them. Then ask the class what that tells us about how reliable star signs are.
Also on: Divination
The second sign of the zodiac, for birthdays from about 20 April to 20 May.
- Element: earth. Ruling planet: Venus.
- Astrologers say Taurus people are steady, patient and fond of comfort.
- In the sky, the Bull's red eye is the bright star Aldebaran, and the Pleiades star cluster sits on its shoulder.
Teaching tip: Have students find Aldebaran on a star chart, then compare the astronomy fact with the astrology meaning. Which one can be checked?
Also on: Divination
The third sign of the zodiac, for birthdays from about 21 May to 20 June.
- Element: air. Ruling planet: Mercury.
- Astrologers say Gemini people are curious, talkative and quick to change their minds.
- In the sky, the twins' heads are the bright stars Castor and Pollux.
Teaching tip: Pair students up as twins. Each describes the other's character in three words, then they swap. It is a quick lesson in how general descriptions fit almost anyone.
Also on: Divination
The fourth sign of the zodiac, for birthdays from about 21 June to 22 July.
- Element: water. Ruled by the Moon.
- Astrologers say Cancer people are caring, protective and attached to home.
- In the sky, Cancer is faint. Its best sight is the Beehive, a cluster of stars at its centre.
Teaching tip: Cancer is hard to see. Ask why a faint constellation still became a famous sign, and what that says about where the zodiac came from.
Also on: Divination
The fifth sign of the zodiac, for birthdays from about 23 July to 22 August.
- Element: fire. Ruled by the Sun.
- Astrologers say Leo people are proud, warm and fond of an audience.
- In the sky, Leo's head is a backwards question mark of stars, and its heart is the bright star Regulus.
Teaching tip: Regulus means little king. Ask students which characters they know with sky names, and whether the name suits them.
Also on: Divination
The sixth sign of the zodiac, for birthdays from about 23 August to 22 September.
- Element: earth. Ruling planet: Mercury.
- Astrologers say Virgo people are careful, practical and good with detail.
- In the sky, Virgo is one of the largest constellations. Its brightest star is Spica.
Teaching tip: Teach the star-hop: follow the curve of the Big Dipper's handle to Arcturus, then on to Spica. Students say it aloud as they trace it.
Also on: Divination
The seventh sign of the zodiac, for birthdays from about 23 September to 22 October.
- Element: air. Ruling planet: Venus.
- Astrologers say Libra people look for balance, fairness and peace.
- The sign begins around the autumn equinox, when day and night are about the same length.
Teaching tip: Libra is the only sign that is an object, not a creature. Ask students what they would weigh on the scales to decide something fairly.
Also on: Divination
The eighth sign of the zodiac, for birthdays from about 23 October to 21 November.
- Element: water.
- Ruling planet: Mars in traditional astrology, Pluto in modern astrology.
- Astrologers say Scorpio people are intense, private and determined.
- In the sky, the constellation is called Scorpius. Its heart is the red star Antares.
Teaching tip: Antares means rival of Mars, because both look red. Have students explain how to tell a red star from the red planet.
Also on: Divination
The ninth sign of the zodiac, for birthdays from about 22 November to 21 December.
- Element: fire. Ruling planet: Jupiter.
- Astrologers say Sagittarius people are hopeful, honest and fond of travel.
- In the sky, its brightest stars make the shape of a teapot, and the centre of our galaxy lies in that direction.
Teaching tip: The archer is drawn as a centaur. Link it to the centaurs of the forest, who read the stars in their own way.
Also on: Divination
The tenth sign of the zodiac, for birthdays from about 22 December to 19 January.
- Element: earth. Ruling planet: Saturn.
- Astrologers say Capricorn people are hard-working, patient and ambitious.
- In the sky, the constellation is called Capricornus, a faint triangle of stars pictured as a goat with a fish's tail.
Teaching tip: Ask students to draw a sea-goat from the description alone, then compare drawings. It shows how star pictures come from imagination.
Also on: Divination
The eleventh sign of the zodiac, for birthdays from about 20 January to 18 February.
- Element: air, despite the name.
- Ruling planet: Saturn in traditional astrology, Uranus in modern astrology.
- Astrologers say Aquarius people are independent, inventive and fond of new ideas.
- In the sky, Aquarius is a large, faint constellation pictured as a figure pouring water from a jar.
Teaching tip: Students often think Aquarius is a water sign because of its name. Use it as a memory check on the four elements.
Also on: Divination
The twelfth and last sign of the zodiac, for birthdays from about 19 February to 20 March.
- Element: water.
- Ruling planet: Jupiter in traditional astrology, Neptune in modern astrology.
- Astrologers say Pisces people are dreamy, gentle and imaginative.
- In the sky, Pisces is two faint fish joined by a cord.
Teaching tip: Pisces closes the circle. Have students recite all twelve signs in order, then say which sign comes after it.
Also on: Divination
Astrology sorts the twelve signs into four elements, three signs each.
- Fire: Aries, Leo, Sagittarius. Said to be bold and energetic.
- Earth: Taurus, Virgo, Capricorn. Said to be practical and steady.
- Air: Gemini, Libra, Aquarius. Said to be thoughtful and sociable.
- Water: Cancer, Scorpio, Pisces. Said to be feeling and intuitive.
- Your star sign is the sign the Sun was in on your birthday.
“Fire acts, earth builds, air thinks, water feels.”
Teaching tip: Sort the class into four corners by element. Each group lists what its three signs are said to share, then the class votes on whether it rings true.
Also on: Divination
A small constellation shaped like a little ladle, also called the Little Dipper. The North Star sits at the end of its handle.
- Polaris, the North Star, is its brightest star.
- Seen from Britain it never sets. It circles the north pole of the sky all year.
- Its other stars are faint, so it is easiest to find on a dark night.
Teaching tip: Have students find Polaris using the Big Dipper's pointer stars first, then trace the Little Dipper back from it.
Five bright stars in the shape of a W or an M, depending on the time of night.
- It sits on the opposite side of the North Star from the Big Dipper.
- Seen from Britain it never sets, so you can find it on any clear night.
- It is named after a proud queen in Greek myth.
Teaching tip: Draw a W on the board and ask students to turn their chart until it matches the sky. It teaches that constellations rotate through the night.
A large cross of stars pictured as a swan flying along the Milky Way. It is also called the Northern Cross.
- Its brightest star, Deneb, marks the swan's tail.
- Deneb is one corner of the Summer Triangle, with Vega and Altair.
- Best seen on summer and autumn evenings.
Teaching tip: Teach the Summer Triangle: students find Deneb, Vega and Altair, then say which constellation each one belongs to.
A small constellation pictured as a harp, home to Vega, one of the brightest stars in the night sky.
- Vega is one corner of the Summer Triangle.
- The rest of Lyra is a small box of four fainter stars below Vega.
- Best seen high overhead on summer evenings.
Teaching tip: Ask students why a tiny constellation is still easy to find. The answer is one very bright star.
The hunting dog that follows Orion across the winter sky. It holds Sirius, the brightest star in the night sky.
- Follow the line of Orion's belt down and to the left to find Sirius.
- Sirius is called the Dog Star because of this constellation.
- Best seen low in the south on winter evenings.
Teaching tip: Star-hop from Orion: students follow the line of the belt down and to the left until they reach Sirius.
A long, winding line of stars that curls between the Big Dipper and the Little Dipper.
- Seen from Britain it never sets.
- Its star Thuban was the North Star about five thousand years ago, when the pyramids were being built.
- The name Draco is Latin for dragon.
Teaching tip: Have students trace the dragon's long body between the two Dippers with a finger, then find the four stars of its head.
A large constellation best known for the Great Square, four stars that mark the horse's body.
- The Great Square is high in the sky on autumn evenings.
- One corner star is shared with the neighbouring constellation Andromeda.
- It is named after the winged horse of Greek myth.
Teaching tip: Ask students to find the Great Square first, then use it as a signpost to Andromeda next door.
A line of stars that stretches away from one corner of the Great Square of Pegasus.
- It holds the Andromeda Galaxy, the most distant thing you can see without a telescope.
- That galaxy is about 2.5 million light-years away, so its light set out long before there were people.
- It is named after a princess in Greek myth.
Teaching tip: On a dark night, have students look for the faint smudge of the Andromeda Galaxy and work out how old that light is.
The solar system is the Sun plus everything that orbits it: eight planets, their moons, dwarf planets, asteroids and comets.
- Order from the Sun: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.
- It formed about 4.6 billion years ago from a cloud of gas and dust.
- The first four planets are small and rocky. The next four are much bigger and made mostly of gas and ice.
“My Very Eager Mother Just Served Us Noodles. Or make up your own.”
Teaching tip: Make a human model. Students stand as the Sun and planets in order and say one fact about their planet. Get the order wrong on purpose and let the class fix it.
The Sun is a star, a giant ball of hot gas that makes its own light and heat and holds the whole solar system together with its gravity.
- It holds almost all of the solar system's mass.
- Its light takes about 8 minutes to reach Earth.
- The surface is around 5,500 degrees Celsius.
- It is middle-aged and has billions of years left.
Teaching tip: Ask students to explain why the Sun looks small and gentle from here but is actually a star like the ones at night. Link it to distance.
The smallest planet and the closest to the Sun, with a year of only 88 Earth days.
- It has almost no air to hold heat, so days are scorching and nights are freezing.
- Its surface is covered in craters, a bit like our Moon.
Teaching tip: Temperature debate: Mercury is closest to the Sun but is not the hottest planet. Ask students why, then reveal Venus.
The hottest planet, wrapped in thick clouds that trap heat, and the brightest planet in our night sky.
- Surface around 465 degrees Celsius, hot enough to melt lead.
- It spins backwards compared with most planets, and a day lasts longer than its year.
- Often called the evening star or the morning star, though it is a planet.
Teaching tip: Ask students why a planet can be hotter than the one closer to the Sun. The answer is its thick, heat-trapping air.
The third planet and the only one we know has life.
- About 70 percent of the surface is covered in water.
- One orbit around the Sun takes about 365 days, which is our year.
- It has one large moon.
Teaching tip: Ask what makes Earth different from the other seven planets. Students should name liquid water, air we can breathe and a stable climate.
The red planet, a cold desert world with the tallest volcano known in the solar system.
- Its red colour comes from rusty iron in the soil.
- It has two tiny moons, Phobos and Deimos.
- A year lasts almost two Earth years.
Teaching tip: Tie it to the centaur belief that a bright Mars warns of conflict. Ask students what science says about why it looks red and bright.
A wide ring of rocky leftovers between Mars and Jupiter.
- It holds millions of rocks, from tiny bits to a few hundred kilometres across.
- The rocks are spread so thinly that they are very far apart.
Teaching tip: Correct the movie picture. Ask students to explain why the belt is mostly empty space and a spaceship could fly through easily.
The biggest planet, a giant ball of gas with a storm bigger than Earth.
- The Great Red Spot is a storm that has been raging for hundreds of years.
- Four large moons were found by Galileo: Io, Europa, Ganymede and Callisto.
- Ganymede is the biggest moon in the solar system.
Teaching tip: Scale activity: if Earth is a marble, Jupiter is a basketball. Have students pick the right objects to show the size difference.
The ringed planet, famous for bright, wide rings made of ice and rock.
- It is the least dense planet. It would float in a giant bathtub.
- Its largest moon, Titan, has a thick orange atmosphere.
- The rings are very wide but extremely thin.
Teaching tip: Ask why rings are made of ice and rock chunks instead of a solid disc. Students can model it with beads on a plate.
A pale blue ice giant that spins tipped over on its side.
- A year takes about 84 Earth years.
- Because of its tilt, each pole gets about 42 years of sunlight, then 42 years of darkness.
- It was the first planet found with a telescope.
Teaching tip: Have students act out the sideways tilt: slowly roll a ball on its side around a lamp and describe what the seasons would be like.
The farthest planet from the Sun, a deep blue world with the fastest winds in the solar system.
- One orbit takes about 165 years.
- It was found by calculation before it was seen through a telescope.
Teaching tip: Tell the discovery story as a mystery: astronomers noticed Uranus drifting off course and worked out where a hidden planet must be.
Small, round worlds that orbit the Sun but have not cleared their path of other objects.
- Pluto was reclassified as a dwarf planet in 2006.
- Other examples include Ceres, in the asteroid belt, and Eris.
- Most live far out in the cold edge of the solar system.
Teaching tip: Hold a mini debate on the 2006 vote: should Pluto still be a planet? Students argue using the three rules for a planet.
Dirty snowballs of ice and dust that grow glowing tails when they come close to the Sun.
- The tail always points away from the Sun, pushed by sunlight and solar wind.
- Halley's Comet returns about every 76 years. The next visit is due around 2061.
- Comets were once seen as omens.
Teaching tip: Ask which way a comet's tail points as it moves around the Sun. Most students guess behind it. The answer is away from the Sun.
A meteor, or shooting star, is a tiny space rock burning up as it hits the air.
- Showers happen when Earth crosses the trail left by a comet. The Perseids peak in August and the Geminids in December.
- A space rock that survives and lands is called a meteorite.
Teaching tip: Plan a watch night in character. Students pick a good dark spot, a time and what they will bring, and report how many streaks they saw.
A star is a huge ball of hot gas that makes its own light through nuclear fusion.
- Planets and moons only reflect light. Stars make it.
- Stars twinkle. Planets usually shine with a steady light.
- The Sun is the closest star.
“Stars twinkle. Planets just shine.”
Teaching tip: Quick sort: students place objects in the sky into star, planet, moon or other. Look for the common mistake of calling planets stars.
A star's colour tells you how hot it is.
- Blue and white stars are the hottest.
- Yellow stars like the Sun are medium.
- Red stars are the coolest.
Teaching tip: Draw a campfire or stove flame. Students predict what colour is hottest, then match it to the star colours.
A constellation is a pattern of stars people have named, used for finding your way across the sky.
- The stars in a constellation are usually not near each other. They only look close from Earth.
- Different cultures drew different pictures.
- 88 official constellations cover the whole sky.
Teaching tip: Have students invent a new constellation by joining dots on a star map, then explain the story behind it.
One of the easiest constellations to spot, with three bright stars in a row forming a belt.
- Best seen in winter evenings in the northern hemisphere.
- Betelgeuse, a red giant, marks one shoulder. Rigel, a blue-white star, marks a foot.
Teaching tip: Teach a star-hop. Start at Orion's three belt stars and have students use them to find other bright stars nearby.
The Big Dipper is a group of seven stars. Follow its two outer stars and they point to Polaris.
- Polaris, the North Star, sits almost directly above the north pole, so it hardly moves.
- Travellers have used it to find north for centuries.
Teaching tip: Practice finding north. Two students trace the line from the Dipper's pointer stars while the rest check their route on a map.
The zodiac is the band of twelve constellations the Sun appears to pass through during the year.
- It is the same band where the planets and Moon travel.
- Astrology links these patterns to personality. Astronomy only tracks where they are.
Teaching tip: Separate astronomy from astrology in class. Ask students what the zodiac stars are, then how some wizards use them for divination.
The brightest star in the night sky, in the constellation Canis Major, the Greater Dog.
- Also called the Dog Star.
- It looks brightest because it is both very luminous and relatively close.
- Many wizarding families name their children after stars and constellations.
Teaching tip: Ask students why a character might be named after a star. Link it to families who name children after the sky.
A light-year is a distance, not a time: how far light travels in one year.
- That is about 9.5 trillion kilometres.
- The nearest star after the Sun, Proxima Centauri, is about 4.2 light-years away.
- We see stars as they were years ago.
Teaching tip: Do a travel-time exercise. Students work out how long the closest star's light takes to reach us, then discuss why starlight is old news.
Stars are born from clouds of gas, shine for a long time, then fade or explode.
- Birth: a cloud of gas collapses and ignites.
- Most of life: a steady star like our Sun.
- Death of a small star: swells into a red giant then shrinks to a white dwarf.
- Death of a very big star: explodes as a supernova, leaving a neutron star or black hole.
Teaching tip: Make a flow chart together and add short in-character captions at each stage. It doubles as a story timeline for a long-lived character.
The Milky Way is our galaxy, a huge spiral of hundreds of billions of stars. We live inside it.
- On a dark night it shows as a pale band across the sky.
- Our solar system sits in one of its spiral arms.
- Other galaxies lie beyond ours, many millions of light-years away.
Teaching tip: Ask students to explain why we see the galaxy as a band across the sky and not a disc. They can use a plate seen edge-on.
Seasons happen because Earth is tilted, not because it moves closer to or farther from the Sun.
- The tilt is about 23.5 degrees.
- When your half of the Earth tilts toward the Sun, you get summer. When it tilts away, you get winter.
- Seasons are opposite in the northern and southern hemispheres.
Teaching tip: Bust a myth. Ask whether summer is when Earth is closest to the Sun, then show that the tilt matters more than the distance.
You can see five planets without a telescope: Mercury, Venus, Mars, Jupiter and Saturn.
- Planets shine steadily while stars twinkle.
- Venus and Jupiter are the brightest.
- Look near the path where the Sun and Moon travel.
Teaching tip: Make a sky-watch log: students record date, time and where they saw a bright steady light, then check it against a star chart.
Good stargazing is about patience and preparation more than equipment.
- Give your eyes about 20 minutes to adjust to the dark.
- Use a red torch to read your chart, because red light keeps your night vision.
- Pick a clear night away from bright lights.
- Start with the Moon, then find a few bright stars and planets.
Teaching tip: Run a night-class scene. Students check the checklist aloud before they start, as a professor would.
A star chart is a map of the sky showing where stars and planets appear at a given date and time.
- Turn the chart so the direction you face is at the bottom.
- The sky shifts through the night and across the year, so always record the date and time.
Teaching tip: Give each student a simple star map and have them find three named stars. They log the date and time, as in Astronomy class.
The Moon goes through 8 phases in about 29.5 days as it orbits Earth.
- Order: new, waxing crescent, first quarter, waxing gibbous, full, waning gibbous, last quarter, waning crescent.
- The Moon makes no light of its own. We see sunlight bouncing off it.
- Phases 1 to 4 build up, 5 is the peak, 6 to 8 wind down.
“The Moon is always half lit by the Sun. The phase is just how much of that lit half we can see.”
Teaching tip: Have students act it out: one holds a lamp (the Sun), one walks a ball (the Moon) around a classmate (Earth). Ask what each person sees from where they stand.
The Moon sits between Earth and the Sun, so the lit side faces away and we cannot see it.
- Meaning: new beginnings, setting intentions.
- Solar eclipses can only happen at this phase.
Teaching tip: Ask why the dark Moon is the one time a solar eclipse can happen. Have students trace the Sun-Moon-Earth line on the board.
A thin sliver of light appears on the right side and grows each night.
- Meaning: hope and first steps.
Teaching tip: Pair students up: one draws the thin sliver from memory, the other checks it against the strip at the top of the page. Ask which side is lit.
The right half is lit. The Moon is a quarter of the way around its orbit.
- Meaning: taking action, pushing through obstacles.
- Called a quarter because of the orbit, even though it looks like a half.
Teaching tip: Clear up the name trap: it looks like a half Moon but is called a quarter. Ask students to explain it using the orbit, not the picture.
More than half lit and still growing toward full.
- Meaning: refining, patience, building momentum.
- Gibbous means bulging or humped.
Teaching tip: Ask students to describe the shape in their own words before you give the word gibbous. Own words first, vocabulary second.
Earth is between the Sun and Moon, so the whole face is lit.
- Meaning: peak power, completion, things revealed.
- Werewolves transform, mooncalves come out to dance, and fluxweed is picked.
- Lunar eclipses can only happen at this phase.
Teaching tip: Connect it to three other subjects: creatures, potions and plants. Ask which one depends most on exact timing.
The light starts shrinking from the right side.
- Meaning: gratitude, sharing what you have learned.
Teaching tip: Use it for a gratitude round: each student shares one thing they learned this week, in character.
The left half is lit. The Moon is three quarters of the way around.
- Meaning: letting go, release, forgiveness.
Teaching tip: Ask how this phase differs from the first quarter. A good answer names which side is lit, and that the Moon is shrinking.
A thin sliver on the left before the Moon goes dark again.
- Meaning: rest, reflection, getting ready for the next cycle.
Teaching tip: Have students predict what comes next and how many nights until the cycle restarts. It reinforces the 29.5-day idea.
Waxing means the lit part is growing. Waning means it is shrinking.
- Seen from Scotland (northern hemisphere): lit on the right is waxing, lit on the left is waning.
“Light on the right, growing bright. Light on the left, little is left.”
Teaching tip: Teach the right/left rule, then flip the question: what would a student in the southern hemisphere see? Good stretch for older years.
The phase depends on where the Moon is in its orbit, which changes how much of its sunlit half faces Earth.
- Phases are not caused by Earth's shadow. That is a common wrong answer.
- Earth's shadow only matters during a lunar eclipse.
- We always see the same side of the Moon because it turns once for every orbit (tidal locking).
Teaching tip: Most students blame Earth's shadow. Ask them to explain why that cannot be right, given that lunar eclipses are rare but phases happen every night.
The Moon passes between the Sun and Earth and blocks the Sun.
- Only possible at new moon.
- Never look at one without protection.
Teaching tip: Safety moment first: ask the class what protection a careful student would use, and why a quick peek is still a bad idea.
Earth passes between the Sun and Moon, and Earth's shadow falls on the Moon.
- Only possible at full moon.
- The Moon often turns a dull red during a total lunar eclipse.
Teaching tip: Ask students to compare it with the solar eclipse in two columns: what blocks what, which phase, how long it lasts.
We study eclipses to predict the sky, and omens to work out what sky events might mean.
- Eclipses follow cycles, so careful tracking tells you when the next one comes.
- Moon and sun timing affects potions, plants, creatures and some rituals.
- Knowing omens helps you tell real signs from plain superstition.
“Because the sky gives warnings before the world does, Professor.”
Teaching tip: Short debate: is an omen a fact or a story people tell? Ask for one ordinary explanation and one magical explanation of the same sky event.
Observing is recording what is really there. Interpreting is working out what it means. Always in that order.
- Observe: phase, colour, visible planets, brightness, date and time. No opinions yet.
- Watch over many nights. Patterns only show with time.
- Interpret: compare with charts and past records, and consider more than one explanation.
“First we watch, then we wonder. A wizard who interprets without observing is only guessing.”
Teaching tip: Use two columns on the board: What I saw, and What I think it means. Any opinion that lands in the first column gets moved to the second.
Taught at night on top of the Astronomy Tower, the tallest tower in the castle.
- The Astronomy professor meets the class at the top of the tower.
- First years have lessons at midnight and need a telescope.
- Students learn star names and how the planets move, and fill in star charts.
Teaching tip: Run it as a night lesson scene: students arrive with a chart, name one star or planet, and say one observation before leaving.
Students chart the planets and learn their moons for homework and exams.
- Jupiter's moon Europa is covered in ice, and Io has volcanoes.
- Centaurs watch Mars closely. A very bright Mars is read as a sign of conflict.
Teaching tip: Give each student one planet to chart for homework. In class they present one surprising fact in under thirty seconds.