These are the four planets closest to the Sun. They are made of rock and metal and have solid surfaces you could actually walk on.
: Our perfect oasis. It is the only known place in the universe to harbor life, actively recycling its crust through plate tectonics and maintaining vast oceans of liquid water. planet
: The ultimate land of extremes. Because it has virtually no atmosphere to trap heat, daytime temperatures soar to a blistering 840°F (450°C), while nights plummet to a frozen -275°F (-170°C). These are the four planets closest to the Sun
Moving past the asteroid belt, we find massive worlds made mostly of hydrogen and helium gas with no true solid surfaces. About the Planets - NASA Science planet
These are the four planets closest to the Sun. They are made of rock and metal and have solid surfaces you could actually walk on.
: Our perfect oasis. It is the only known place in the universe to harbor life, actively recycling its crust through plate tectonics and maintaining vast oceans of liquid water.
: The ultimate land of extremes. Because it has virtually no atmosphere to trap heat, daytime temperatures soar to a blistering 840°F (450°C), while nights plummet to a frozen -275°F (-170°C).
Moving past the asteroid belt, we find massive worlds made mostly of hydrogen and helium gas with no true solid surfaces. About the Planets - NASA Science