Which planet closer to the sun
Pro Research Analysisby 
Searched over 200M research papers
Which Planet is Closer to the Sun?
Inner Planets: Mercury, Venus, Earth, and Mars
The planets closest to the Sun are known as the inner planets or terrestrial planets. These include Mercury, Venus, Earth, and Mars. These planets share many similarities, such as their rocky surfaces, which justify their classification together .
Mercury: The Closest Planet to the Sun
Among the inner planets, Mercury holds the distinction of being the closest to the Sun. This proximity results in extreme temperature variations on its surface, making it a unique subject of study in planetary science .
Venus and Mars: Neighbors in the Solar System
Following Mercury, Venus is the second closest planet to the Sun, while Mars is situated a bit further away. These planets, along with Earth, form the group of terrestrial planets that are often studied together due to their similar characteristics and proximity to the Sun.
Conclusion
In summary, Mercury is the planet closest to the Sun, followed by Venus, Earth, and Mars. These inner planets, also known as terrestrial planets, share many similarities and are often studied together in planetary science.
Sources and full results
Most relevant research papers on this topic