Celestial Pet Names: 110 Cosmic Star & Moon Ideas

There's something magical about a celestial pet name — the moon, the stars, distant planets, and the vast glittering cosmos have inspired wonder for as long as humans have looked up at the night sky. And these dreamy, cosmic names suit pets beautifully, especially mysterious cats who prowl by moonlight or dreamy-eyed dogs who feel like a little piece of the universe. Whether your pet has a starry sparkle in their eyes, a moonlit coat, or simply an out-of-this-world personality, there's a perfect cosmic name here for them. So let's reach for the stars and find your companion a name as magical as the night sky.

Here are 110 of the best celestial pet names — star and moon picks, planet and galaxy options, and cosmic mythology ideas for dogs and cats. I've also added tips for naming your stellar companion. Let's find your pet their perfect cosmic name.

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🌙 Moon & star names

The moon and stars are the heart of celestial naming — these dreamy picks are pure magic:

For girls: Luna, Stella, Star, Estrella, Selene, Nova, Celeste, Aurora, Vega, Astra, Lyra, Mahina (moon), Twinkle, Starla, Sidra, Hoshi (star), Bellatrix (Bella), Carina, Cassiopeia (Cassie), Andromeda (Andie).

For boys: Orion, Cosmo, Leo, Sirius, Apollo, Sol, Atlas, Castor, Rigel, Altair, Draco, Phoenix, Comet, Star-lord (Star), Nash, Hadar, Pollux, Cosmos, Galileo, Astro.

Luna, Stella, and Nova are the standout celestial girl names — Luna ("moon") is the #1 cosmic pet name for good reason, Stella means "star," and Nova is a brilliant exploding star. Orion, Sirius, and Cosmo lead the boys — Sirius is the brightest star in the sky (and a Harry Potter nod!).

🪐 Planet & galaxy names

For a pet who's truly out of this world — these planetary and galactic names are cosmic and cool:

Jupiter, Mars, Saturn, Venus, Neptune, Mercury, Pluto, Galaxy, Cosmos, Nebula, Comet, Meteor, Eclipse, Aurora, Quasar, Pulsar, Solar, Halley, Astro, Cosmo, Milky (Way), Andromeda, Star, Titan, Europa, Phobos, Rocket, Astrid, Celestia, Cosmic.

Jupiter, Neptune, and Galaxy are the standout planetary picks — grand, cosmic, and fun. Mars and Saturn are bold, cool planet names, while Nebula and Aurora are gorgeous, dreamy choices for a shimmery or colorful pet. Pluto is a classic, beloved pet name (and a planet in our hearts!).

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✨ Cosmic mythology & light names

For a pet with mythic, glowing, celestial magic — these names blend the cosmos with legend and light:

Apollo (sun god), Helios, Selene (moon goddess), Sol, Ra, Aurora, Nyx (night), Astraea, Phoebe, Cosmo, Cosmos, Zenith, Halo, Lux (light), Twilight, Dawn, Dusk, Eclipse, Solstice, Astrid, Celestia, Star, Shine, Glimmer, Lumen.

Apollo, Selene, and Aurora are the standout cosmic-mythology picks — Apollo (sun god) and Selene (moon goddess) carry divine celestial power, while Aurora (the dawn, and the northern lights) is dreamy and beautiful. Lux and Lumen ("light") are lovely for a bright or glowing pet.

Tips for naming your celestial pet

A few friendly pointers to help you choose the perfect cosmic name:

A celestial pet name is as magical and dreamy as the night sky itself — whether that's a moonlit Luna, a starry Orion, a brilliant Nova, or a cosmic Galaxy. Whatever you choose, your stellar companion will carry a little piece of the glittering universe in their name.

The timeless wonder of a celestial name

Humans have gazed up at the stars in wonder for thousands of years, naming constellations, telling myths about the moon and sun, and finding magic in the vast cosmos above — so it's no surprise that celestial names carry such timeless, dreamy beauty. Giving your pet a cosmic name taps into that ancient sense of wonder and magic, wrapping your companion in a little of the universe's glittering mystery. There's a reason Luna ("moon") has become one of the single most popular pet names in the world: it's beautiful, dreamy, easy to call, and perfectly suits the mysterious, moonlit magic of a beloved pet (especially a cat).

Celestial names also offer a wonderful range, from the gentle and dreamy (Luna, Stella, Aurora, Celeste) to the bold and cosmic (Orion, Jupiter, Nova, Comet) to the mythic and glowing (Apollo, Selene, Sol, Lux). This means there's a celestial name for every pet's personality and look. You can match the name to their coloring — a silvery or white pet suits moon-and-star names (Luna, Celeste, Star), a black pet suits night-and-eclipse names (Nyx, Eclipse, Cosmo, Shadow), a golden pet suits sun names (Sol, Apollo, Sunny), and a shimmery or multi-colored one suits galaxy names (Nebula, Galaxy, Aurora). You can also lean into personality — a dreamy, gentle pet suits Luna or Celeste, a bold cosmic one suits Orion or Jupiter, a mysterious nocturnal cat suits Nyx or Selene. The best celestial pet name brings together that cosmic wonder, your pet's coloring, and their dreamy or bold personality — whether that's a moonlit Luna, a starry Orion, or a brilliant Nova. Look up at the night sky, think of your pet's own little spark of magic, and the perfect cosmic name will shine through.

Match the cosmic name to your pet

The dreamy thing about celestial names is how naturally they pair with a pet's look — the night sky has a perfect match for every coat. A sleek black cat or dog is a natural Nyx (goddess of night), Eclipse, Cosmo, or Shadow, leaning into that dark, mysterious, midnight magic. A white or silvery pet shimmers as a Luna, Star, Celeste, or Comet. A golden pet glows as a Sol, Apollo, Sunny, or Star-lord. And a beautifully marked, shimmery, or multi-colored pet sparkles as a Galaxy, Nebula, or Aurora. Matching the name to your pet's coloring makes that cosmic magic feel wonderfully personal.

Personality is a lovely guide too. A dreamy, gentle, serene pet suits the soft celestial names (Luna, Celeste, Stella, Aurora); a bold, adventurous one suits the grand cosmic picks (Orion, Jupiter, Cosmo, Rocket); and a mysterious, nocturnal cat who prowls by moonlight is the ultimate Nyx, Selene, or Vesper. Cats in particular wear celestial names beautifully — there's something perfectly fitting about a graceful, mysterious feline named after the moon and stars. And because so many celestial names (Luna, Nova, Stella, Orion) are both dreamy and genuinely popular, you get a name that's magical and timeless at once. Look up at the night sky, think of your pet's own little spark of wonder, match the name to their coat and spirit, and the perfect cosmic name will shine through like the brightest star.

Frequently Asked Questions

What are good celestial pet names?

Top celestial pet names include Luna, Orion, Stella, Nova, Cosmo, and Aurora — a mix of moon and star picks, planet and galaxy options, and cosmic mythology names perfect for a dreamy, stellar pet.

What's a good moon name for a pet?

Moon pet names include Luna (the classic!), Selene, Celeste, Mahina, and Crescent — dreamy, mystical names perfect for a moonlit pet, especially a mysterious cat.

What's a good star name for a pet?

Star pet names include Stella, Nova, Sirius, Vega, Estrella, and Star — brilliant, sparkling names that capture the magic of the night sky (Sirius is the brightest star, and a Harry Potter nod!).

What's a cosmic name for a black pet?

Cosmic names for a black pet include Nyx (night goddess), Eclipse, Cosmo, Shadow, Comet, and Orion — dark, mysterious celestial names that perfectly suit a black coat.

What are planet names for pets?

Planet pet names include Jupiter, Mars, Saturn, Neptune, Venus, and Pluto — grand, cosmic, fun names (Pluto remains a beloved pet name and a planet in our hearts!).

Why is Luna such a popular pet name?

Luna means "moon" and has become one of the most popular pet names in the world because it's beautiful, dreamy, easy to call, and perfectly captures the mysterious, moonlit magic of a beloved pet — especially a graceful, nocturnal cat.

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Ready to name your celestial pet?

Whether you choose a moonlit Luna, a starry Orion, a brilliant Nova, or a cosmic Galaxy, there's a perfect celestial name here for your pet — one as magical, dreamy, and out-of-this-world as the glittering night sky.

👉 Open the free Pet Name Builder and match a cosmic name to your pet's look and personality — hundreds of ideas, instant matches, no signup. 🐾

Which name shines brightest? That's the one — go give your stellar companion their cosmic name!