... The Wind on Mars . ... The Earth's orbit is not a perfect, sun-centered circle. At aphelion, the most distant point in Earth's orbit, the Sun is 150 million kilometers away and at perihelion, the closest point, Earth approaches the Sun to within about 147 million kilometers. ... Venus Once Molten Surface . ... Known as Lunokhod 1, it weighed just under 2,000 pounds and was designed to operate.. ... Except for the Rings of Saturn, The Ring Nebula (M57) is probably the most famous celestial band. ...