Starts with Z.

Many first-time zodiacal light hunters pass the light by because they're looking for something small, but under a dark sky with no Moon the luminous thumb of interplanetary dust extends across 30° of azimuth and some 60° in altitude. For amateurs, Sirius offers the tantalizing possibility of seeing its white dwarf companion, Sirius B, nicknamed the Pup. The moons orbit Jupiter at different rates, changing positions along an almost straight line from our point of view on Earth. NIPPING AT EACH OTHER This photo, taken in 2017, gives a good impression of Sirius and its tiny companion, the white dwarf Sirius B (fondly known as the Pup), as seen through an amateur telescope at high magnification. [Extracted from the article]
Copyright of Sky & Telescope is the property of American Astronomical Society and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)