Star Trek: 8 Easter Eggs From The Lower Decks Season 2 Trailer

8. As In Kieran?

The action begins with a shot of a Federation vessel evading yellow phaser fire in some kind of asteroid field or other sci-fi phenomenon.

Labelled the USS MacDuff (probably not named after fictitious Enterprise-D first officer Kieran MacDuff from "Conundrum", but you never know), this vessel appears to be an updated Miranda-class starship.

You'll remember the Miranda-class from every other episode of Star Trek: The Next Generation and Star Trek: Deep Space Nine that called for a couple generic Starfleet vessels. First introduced in Star Trek II: The Wrath of Khan as the USS Reliant, the Miranda-class is apparently a Starfleet workhorse, operating from the 2280s to at least the 2380s. Here the ship has been given a slight 24th century makeover with blue-glowing nacelle grilles and red-glowing bussard collectors, consistent with the aesthetics introduced in Star Trek: The Next Generation and carried through to Lower Decks.

The MacDuff's registry, by the way, is NCC-1877. While Starfleet registries basically mean nothing, this might indicate the USS MacDuff has been in service a long, long time, as the USS Reliant's registry was NCC-1864.