Aside from Earth's moon, this is the brightest natural object in the night sky.
Giovanni Riccioli was the first to note the so-called "Ashen light" glow emanating from this object. Japan attempted to send the craft Akatsuki or "Planet-C" to this object. This object contains the regions Alpha and Beta Regio, and its highest point is Maxwell Montes. Aside from Earth's moon, this is the brightest natural object in the night sky. This planet's atmospheric mass is almost entirely carbon dioxide, even though its size is very similar to Earth's, leading to its nickname of "Earth's twin." For 10 points, name this second planet from the Sun.
Giovanni Riccioli was the first to note the so-called "Ashen light" glow emanating from this object.
Venus