Unverified50% confidenceFactExact time
Before 1995, all planets known to humanity existed only within the solar system, and there was no observational evidence of any exoplanet.
1
Sources
50%
Confidence
Long-term
Relevance
10/20/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedThe 6000 confirmed exoplanets are distributed only within a very small region around the Sun, and are not a miniature of the total number of planets in the Milky Way.60% similarUnverifiedTraditional solar system visualizations typically display only the eight planets and a handful of well-known objects.60% similarUnverifiedThe first exoplanet around a main-sequence star, 51 Pegasi b, was discovered in 1995 and confirmed through the radial velocity method.56% similarUnverifiedThe fourth planet of HR 8799, planet e, was confirmed in 2010, making it the exoplanetary system with the most directly imaged planets to date.54% similarUnverifiedThe Moon has almost no atmosphere, so cosmic rays and solar particle events cannot be effectively shielded.54% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/1077673API
curl https://kongchang.com/api/v1/knowledge/claims/1077673MCP
get_claim(id=1077673)