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Which planet is the smallest in the Solar System?
It is the closest planet to the Solar System, with a diameter just over one-third that of Earth.
Solar System
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Articles about Solar System
420 published items.
Conquer Mars
UAE spacecraft takes photos of the solar system's largest volcano
The UAE's Hope probe sent back its first image of Mars days after successfully entering orbit around the planet.
Space science
How long does it take to reach another star system besides the Solar System?
A group of physicists decided to estimate how long it would take us to reach other star systems in the Milky Way using existing spacecraft.
Space science
'Planet 9' left its mark on Earth before disappearing?
A mysterious planet may have approached the early Sun at a distance slightly farther than Uranus and rearranged everything in the star system.
Space science
A 'dark object' may have brought life to Earth
An elusive class of objects may be much more numerous than previously thought and may be life-bearing spacecraft.
Space science
The Truth About the Solar System's 3rd Habitable Planet
The Solar System actually has three planets in its orbit.
Space science
Announcement of discovery of micro-asteroid population in the Solar System
An astronomical research team at the University of Liège in this country and international colleagues have just announced the discovery of a population of 138 smallest a…
Space science
Could the Sun Capture a New Planet, Changing Life on Earth?
A new analysis suggests the Sun is likely to
Space science
First discovery of life-preserving magnetosphere outside the Solar System
When we think about the habitability of exoplanets, the role of magnetic fields in maintaining a stable environment is something to consider alongside things like atmosp…
Space science
Unexpected discovery of the largest storm lasting 190 years in the Solar System
New observations of Jupiter's Great Red Spot captured by the Hubble Telescope have revealed the 190-year-old storm wobbling like jelly and changing shape like a squashed…
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Strange Phenomenon: Why Are Planets 'Running Away' From the Sun Despite Their Extremely Strong Gravitational Force?
The planets are not affected.
Space science
From outside the Solar System, Voyager 1 still sends data back to Earth
Forty-seven years after its launch, Voyager 1 continues to bring back important data from outside the Solar System.
Space science
NASA spacecraft lost in strange space at the edge of the Solar System
What NASA's New Horizons spacecraft encountered may hint at a hidden structure in the coldest, darkest reaches of the Solar System.
Space science
NASA spacecraft encounters mysterious ring surrounding the Solar System
Astronomers have discovered a myriad of mysterious objects in the outer Kuiper Belt region at the edge of the Solar System.
Discover science
Is the Sun really common in the Milky Way?
99.8% of the mass in the Solar System is occupied by the Sun, as the only star, the Sun firmly holds a dominant position in the entire stellar system.