Image 1 Caption: The Martian moons are Phobos (mean radius 11.1 km) and Deimos (mean radius 6.2 km) are shown to-scale in size and with Mars which means they are NOT visible without doing a triple-click to see the enlarged image. Although the image is to-scale, it may be a collage and NOT a single image. The vertical of the image is, more or less, Martian east-west.

Features:

1. The Martian moons are both irregular in shape because they are too low mass to have been pulled into spherical shape by self-gravity

2. The commonest origin theory is that the Martian moons are captured asteroids, but rival theories exist (see Wikipedia: Moons of Mars: Origin).

3. The Martian moons were discovered in 1877 during the same FAVORABLE opposition that resulted in emphasis given to the possible existence of the Martian canals. They were discovered by Asaph Hall (1829--1907) at the US Naval Observatory (USNO) in Washington, D.C..

4. Jonathan Swift (1667--1745) (in Gulliver's Travels (1726, 1736)) and Voltaire (1694--1778) fictionally predicted that Mars would have 2 moons. Craters on Deimos are named for Swift and Voltaire. And who can forget that immortal yarn The Secret of the Martian Moons (1955) by Donald A. Wollheim (1914--1990). Vote now for Crater Wollheim.

   

5. Image 2 Caption: The Martian moons are Phobos (mean radius 11.1 km) and Deimos (mean radius 6.2 km) are shown to-scale in size in collage.

   The image is false color in order to bring out details.

Images:

1. Credit/Permission: NASA, 2007 (uploaded to Wikipedia by Magnus Manske, 2008) / Public domain.
   Image link: Wikipedia: File:Mars Moons Orbit distance flipped.jpeg.
   
2. Credit/Permission: © Giuseppe Donatiello, 2020 / Public domain.
   Image link: Wikimedia Commons: File:Phobos and Deimos.jpg.