The hundred cards

100 cards in 10 sections

The Sun and its family

Section 1 · 10 cards

The SunAn ordinary star, seen up closeWith your eyesInside the SunAn explosion held still by its own weightOnly from spacecraftSunspotsDark only by contrastWith a telescopeThe solar windThe Sun sends out more than lightOnly from spacecraftAurorasCurtains of light that moveWith your eyesHow the Solar System was bornIt all began with a falling cloudOnly from spacecraftGravity and orbitsFalling and always missing the targetOnly from spacecraftThe asteroid beltMuch emptier than we imagineWith a telescopeThe Kuiper BeltThe second belt, made of iceOnly from spacecraftThe Oort CloudNobody has ever seen itOnly from spacecraft

The rocky planets

Section 2 · 10 cards

MercuryThe smallest and the fastestWith your eyesVenusThe morning star and the evening starWith your eyesEarthThe planet of liquid waterWith your eyesMarsThe red planet, and why it is redWith your eyesThe seasonsIt is not a matter of distanceWith your eyesThe volcanoes of VenusMore volcanoes than any other planetOnly from spacecraftEarth's atmosphereA very thin skin of airWith your eyesEarth's magnetic fieldA shield you cannot seeOnly from spacecraftOlympus MonsThe tallest mountain in the Solar SystemOnly from spacecraftWater on MarsA planet that once had an oceanWith a telescope

Giants and dwarf planets

Section 3 · 10 cards

JupiterThe giant of all the giantsWith your eyesThe Great Red SpotA storm that has lasted for centuriesWith a telescopeSaturnThe planet that would floatWith your eyesSaturn's ringsWide as the sky, thin as paperWith a telescopeUranusThe planet that rolls on its sideWith binocularsNeptuneFound with mathWith a telescopePlutoFor seventy-six years it was a planetWith a telescopeCeresThe dwarf planet closest to usWith binocularsErisThe body that demoted PlutoOnly from spacecraftWhy Pluto is no longer a planetPluto did not change, the word didOnly from spacecraft

Moons

Section 4 · 10 cards

The MoonOur one and only companionWith your eyesThe phases of the MoonNot a shadow, a point of viewWith your eyesTidesThe sea that rises and fallsWith your eyesThe far side of the MoonHidden, not darkOnly from spacecraftIoThe most volcanic place knownWith binocularsEuropaAn ocean under the iceWith binocularsGanymedeThe biggest moon of allWith binocularsTitanThe only moon with real airWith a telescopeEnceladusA moon that sprays waterWith a telescopePhobos and DeimosTwo moons that look like rocksWith a telescope

Comets and shooting stars

Section 5 · 10 cards

CometsBig dirty snowballsWith binocularsHalley's CometIt comes back every seventy-six yearsWith your eyesComet tailsA tail that does not followWith binocularsShooting starsNot stars, and not fallingWith your eyesMeteor showersDates that come back every yearWith your eyesMeteoritesPieces of sky fallen to the groundWith your eyesImpact cratersHoles as big as citiesWith your eyesBennu and RyuguTwo asteroids visited and touchedOnly from spacecraftThe impact that wiped out the dinosaursThe day that changed the EarthOnly from spacecraftPlanetary defense and the DART missionThe first test of planetary defenseOnly from spacecraft

The stars

Section 6 · 10 cards

What is a star?A ball of gas that lights upWith your eyesHow a star is bornIt starts with a cold cloudOnly from spacecraftNebulaeClouds between one star and the nextWith binocularsRed giantsWhen a star swells upWith your eyesWhite dwarfsThe heart a star leaves behindWith a telescopeSupernovaeA star that outshines a galaxyWith your eyesNeutron starsA city as heavy as a starOnly from spacecraftBlack holesNot even light gets outOnly from spacecraftSiriusThe brightest star in the skyWith your eyesBetelgeuseOrion's orange shoulderWith your eyes

The sky above us

Section 7 · 10 cards

Ursa MajorThe seven stars that never setWith your eyesUrsa Minor and the North StarThe spot in the sky that stays stillWith your eyesOrionThe three stars of the BeltWith your eyesCassiopeiaThe W that is always on guardWith your eyesCygnusThe big cross of summer nightsWith your eyesScorpiusA figure that really looks like oneWith your eyesLeoThe backward question markWith your eyesTaurus and the PleiadesThe V with the orange eyeWith your eyesThe Summer TriangleThree stars from three constellationsWith your eyesThe summer Milky WayOur galaxy seen from insideWith your eyes

Galaxies and the universe

Section 8 · 10 cards

The Milky WayThe galaxy we live inWith your eyesThe Andromeda GalaxyThe farthest thing your eyes can seeWith your eyesTypes of galaxiesThey are not all spiralsWith a telescopeGalaxy clustersGalaxies live in groupsWith a telescopeThe Orion NebulaA star nursery your eyes can seeWith binocularsThe Pillars of CreationThe most famous photograph of the skyWith a telescopeThe light-yearNot a time, a distanceOnly from spacecraftThe Big BangIt was not an explosionOnly from spacecraftThe expanding universeThey are not moving away: space is growingOnly from spacecraftHow big is the universe?We do not know, and maybe never willOnly from spacecraft

Exploring space

Section 9 · 10 cards

The first in spaceA metal ball that went beepOnly from spacecraftApollo 11The first people on the MoonOnly from spacecraftHow a rocket worksIt does not push against the airOnly from spacecraftMars roversCars on another planetOnly from spacecraftThe Voyager probesLaunched in the 1970s, still goingOnly from spacecraftThe Hubble Space TelescopeA telescope put above the airWith binocularsThe James Webb Space TelescopeA mirror made of hexagonsOnly from spacecraftThe International Space StationA home in orbit, always lived inWith your eyesThe Artemis programGoing back to the Moon, and stayingOnly from spacecraftSally RideA job you can really doOnly from spacecraft

Living in space and watching the sky

Section 10 · 10 cards

Life as an astronautA day with no down and no upOnly from spacecraftThe spacesuitNot clothing: a vehicleOnly from spacecraftEating in spaceBread is banned, crumbs flyOnly from spacecraftTelescopesThey collect light, they do not just magnifyWith your eyesStargazing with the naked eyeThe first instrument is your eyesWith your eyesLight pollutionThe sky that disappears over citiesWith your eyesThe lunar eclipseThe Earth casting a shadow on the MoonWith your eyesThe solar eclipseThe Moon covering the SunWith your eyesPlanets of other starsPlanets around other starsOnly from spacecraftSearching for life in the universeA science about something never foundOnly from spacecraft