SOL SYSTEM
Earth. Our Home
- ORBIT225 Earth days
- RADIUS6,051.8 km
- MOONSNone
- ATMOSPHERECO₂, sulfuric acid
REPOSITORY · THE COSMIC LIBRARY
The Cosmic Library
FACTS · DISCOVERY · LITERATURE · HISTORY
A standing record of the cosmos.
Catalogued knowledge on worlds, stars, and machines — the record of our reach into space, preserved for every explorer who follows.
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Browse the Catalogue
Astronautics
Astronautics is the field of science and engineering dedicated to the design, development, and o...
Cosmic Library
Welcome to Your Cosmic Library, your gateway to a universe of knowledge where astronomy and spac...
Sol System
The solar system formed about 4.6 billion years ago from a gigantic molecular cloud of gas and d...
Space Industry V4.0
Space port launch: Welcome to the Era of the Space Industry V4.0; Your Home of cosmic exploratio...
Stargazing
Embark on a journey through the vast expanse of the cosmos with stargazing, an age-old practice...
Featured Fact Sheets
SOL SYSTEM
The Sun
- CLASSG2V main sequence
- AGE4.6 billion years
- DIAMETER1.39 million km
- CORE TEMP15 million °C
- COMPOSITIONHydrogen, helium
SOL SYSTEM
Mars
- ORBIT687 Earth days
- RADIUS3,389.5 km
- MOONSPhobos · Deimos
- COMPOSITIONIron oxide, basalt
SOL SYSTEM
Mercury
- ORBIT88 Earth days
- RADIUS2,439.7 km
- MOONSNone
- COMPOSITIONIron, silicates