Space Exploration

Journey through the cosmos: From our solar system to the edge of the observable universe

Our Solar System

Size Comparison

Click any planet above to compare it. Bars use a square-root scale so the small worlds stay visible.

Sun
1,391,000 km
Jupiter
139,820 km
Earth
12,742 km
6,000+
Satellites in Orbit
5,500+
Confirmed Exoplanets
600+
Humans in Space
12
Moonwalkers

Notable Exoplanets

Kepler-452b
Super-Earth
1,400 light-years
TRAPPIST-1e
Earth-like
39 light-years
Proxima b
Habitable Zone
4.2 light-years
HD 189733 b
Hot Jupiter
64 light-years

Space Exploration Milestones

1957
Sputnik 1: First satellite
1969
Apollo 11: Moon landing
1998
ISS construction begins
2012
Curiosity lands on Mars
2021
James Webb launches
2025+
Artemis: Return to Moon

Cosmic Perspective

93B
Light-Years
Observable universe diameter
200B+
Galaxies
Estimated in the universe
13.8B
Years Old
Age of the universe

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