Hoshira: Astronomy Quiz

Annular eclipse over South America on February 6, 2027. Get to know the sky first: one daily challenge with real planets, stars and galaxies.

Hoshira turns the universe into a 3-minute daily habit.

Two real objects. One question: which is bigger, hotter, farther, or discovered first? Swipe toward your answer, then see both drawn to scale, with a surprising fact and the source it comes from.

DAILY CHALLENGE 10 questions a day, the same for everyone. Keep your streak going and share your result grid without spoiling the answers.

ENDLESS MODE Keep going until you miss one. Questions get harder as you go.

YOUR COSMIC ATLAS Every object you meet joins your Atlas: 116 real planets, moons, dwarf planets, stars, exoplanets, nebulae, galaxies and black holes, each with its key numbers and a fact worth remembering. How many can you collect?

REAL DATA, CITED Values come from NASA, JPL, ESA, the NASA Exoplanet Archive and published research, and every answer shows its source. Where scientists still disagree, Hoshira says so.

MADE FOR CURIOUS PEOPLE • No account and no sign-up • No ads • Your progress stays on your device • Optional daily reminder, off until you turn it on • In English and Spanish

Hoshira is an independent app and is not affiliated with NASA, ESA or JPL.