European Space Agency (ESA)

99942 Apophis

An impact would release energy equivalent to over 1,200 megatons of TNT.

99942 Apophis is an S-type (silicaceous¹) asteroid with an approximate diameter of 1,210 feet. This is an asteroid that primarily consists of silicate minerals and nickel-iron. It has a relatively low albedo² of 0.23, indicating a somewhat reflective surface.

Huygens – Titan Moon Landing

He is chiefly known for his studies of the rings of Saturn and the discovery of its moon Titan.

Christiaan Huygens, Lord of Zeelhem (April 14, 1629 – July 8, 1695), was a Dutch mathematician, physicist, engineer, astronomer, and inventor, who is regarded as one of the most important figures in the Scientific Revolution. In physics, Huygens made seminal contributions to optics and mechanics, while as an astronomer he is chiefly known for his studies of the rings of Saturn and the discovery of its moon Titan.