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| Planet | Français | Pronunciation | Key fact |
| Mercury | Mercure | /ˈmɜːkjʊri/ | Closest to the Sun, extreme temperatures |
| Venus | Vénus | /ˈviːnəs/ | Hottest planet (462°C), thick CO₂ atmosphere |
| Earth | Terre | /ɜːθ/ | Only known planet with life; 71% water |
| Mars | Mars | /mɑːz/ | The Red Planet; has the tallest volcano (Olympus Mons) |
| Jupiter | Jupiter | /ˈdʒuːpɪtə/ | Largest planet; 95 moons; Great Red Spot storm |
| Saturn | Saturne | /ˈsætən/ | Famous ring system; least dense planet |
| Uranus | Uranus | /ˈjʊərənəs/ | Rotates on its side; coldest planet (-224°C) |
| Neptune | Neptune | /ˈneptjuːn/ | Strongest winds (2,100 km/h) |
| Type | Français | Caractéristique |
| Yellow dwarf | Naine jaune | Our Sun — medium size, 5,500°C surface |
| Red giant | Géante rouge | Aging star, expanded 100-1000x its original size |
| White dwarf | Naine blanche | Remnant of a small/medium star, very dense |
| Neutron star | Étoile à neutrons | Remnant of massive star, 1 teaspoon = 1 billion tonnes |
| Red dwarf | Naine rouge | Most common star type, very long-lived |
| Blue supergiant | Supergéante bleue | Hottest, most luminous stars (e.g. Rigel) |