Moons | Astronomy.com

A black-and-white portrait shows a bearded man sitting at a dark wooden desk in the center of the frame, facing slightly to the left. On his desk in the foreground are an open book, a small globe, inkwells, and writing utensils. Behind him, a bookcase filled with books stands on the left, while a plain wall with a small thermometer and a floral-patterned sofa complete the background.

Today in the History of Astronomy

Aug. 11, 1877: Asaph Hall discovers Deimos

A highly pixelated, black-and-white image features a single blurry object floating against a pitch-black background. The subject appears to have two connected sections: a larger, brighter rounded shape on the left and a smaller, dimmer lobe extending to the right. The contrast is sharp between the solid black void and the glowing, blocky white patches of the central object.

Solar System, Today in the History of Astronomy

June 28, 2011: Kerberos is discovered

Human Spaceflight, Today in the History of Astronomy

May 4, 1967: Surveyor 3 last contact

Today in the History of Astronomy

May 1, 1949: The discovery of Nereid

Today in the History of Astronomy

April 30, 1998: The discovery of Caliban and Sycorax

Today in the History of Astronomy

March 12, 2008: Cassini at Enceladus

Today in the History of Astronomy

Jan. 11, 1787: William Herschel discovers two moons of Uranus

Today in the History of Astronomy

Dec. 23, 1672: Saturn’s moon Rhea is discovered

Today in the History of Astronomy

Oct. 26, 2004: Cassini at Titan

A man with long, curly dark hair is depicted from the waist up, facing left. He rests one hand on a large celestial globe while gesturing with his other hand toward an outdoor scene visible through a window behind him. The background shows a large stone building and several figures operating long telescopes on a grassy field, all rendered in detailed monochrome linework.

Today in the History of Astronomy

Oct. 25, 1671: Iapetus is discovered

Organic molecules in Saturn’s rings originated from liquid water, scientists confirm

Robotic Spaceflight, Today in the History of Astronomy

Sept. 26, 2005: Cassini visits Saturn’s weirdest moon