Streak · 7 days+185 XP
7-Night Sky Check Streak
Look at the night sky each evening for a week and note the Moon's shape or a bright star. Check in daily.
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Science · Facts & stats · iChallenge network
The Cosmos Challenge
Daily facts and stats about the cosmos, plus real challenges to put them to work.
Today's 3 challenges
What is the most abundant element in the universe?
You went
Level1Rookie
XPPlay a round to earn XP
Streak0days
LeagueBronzeweekly
Daily #35Resets at midnight UTC
Today's round
- 5 questions
- 20s each
- 0 played today
One ranked attempt per day. Practice as much as you like.
Challenges
Join one, log your days or post your proof. Finishing earns XP and the Finisher badge.
Proof+250 XP
Draw the Moon
Sketch the Moon on three different nights and post a photo link or short write-up about how its shape changed.
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Streak · 14 days+220 XP
14-Day Space Object Streak
Learn about one planet, moon, star or galaxy each day for two weeks and note one fact. Check in daily.
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Proof+250 XP
Kitchen Table Solar System
Build a simple model of the solar system using fruit, balls or paper, in the right size order, and share a photo link.
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By the numbers
Live counts from CosmosChallenge.com. All arena stats →
Facts in the pack12
Players1
Rounds played1
Visitors, 30 days72
Challenge joins17
Leaderboard
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Badges
Earned on any arena, shown on your profile everywhere.
First RoundFinish your first daily round.
FlawlessAnswer every question in a round correctly.
LightningA perfect round in under 25 seconds.
On a RollPlay 3 days in a row.
Week WarriorPlay 7 days in a row.
UnbreakablePlay 30 days in a row.
ExplorerPlay daily rounds in 5 different arenas.
GlobetrotterPlay daily rounds in 25 different arenas.
PolymathPlay daily rounds in 5 different topics.
In the ArenaJoin your first challenge.
FinisherComplete a challenge.
RecruiterInvite a friend who finishes a round.
CaptainInvite 5 friends who finish a round.
PodiumFinish a day in an arena's top 3.
ChallengerReach level 10.
Profile SavedSave your progress with an email.
Save your progress
Add your email to keep your level, streak and badges if you switch devices, and carry them to every iChallenge arena. One email when you save; no spam.
Put a prize on a challenge
Fund a prize on CosmosChallenge.com and your brand sits on the challenge card, the leaderboard and every finisher's share. Prizes only appear once they're funded, so players can trust what they see.
- Pick the challenge and the prize
- We review entries before a funded prize is awarded
- You get finisher and engagement numbers after it closes
Current sponsors
Questions
Do I need a telescope?
No — naked-eye and app-assisted challenges are the default.
How current are questions?
Banks refresh with major mission events.
How does the daily round work?
Everyone on this arena gets the same five questions each day, from easy to hard. You get one ranked attempt; practice rounds are unlimited.
How is my score calculated?
100 points per correct answer, up to 50 more for answering quickly, a combo multiplier for answers in a row, and 150 bonus points for a perfect round.
Is it free?
Yes. Playing, streaks, badges and leaderboards are free. Some challenges carry a sponsor-funded prize; the challenge card shows it when one is funded.