Trolls' meteor

The trolls' meteor is a Veil meteor of the post-Scratch troll session that contained the session's Ectobiology Lab.

Post-Scratch trolls' session
The meteor was initially discovered by Karkat Vantas when he traveled there to perform his Ectobiology duties. Following Bec Noir's rampage through the trolls' session, the troll players took refuge on the meteor.

It was on the meteor that Terezi discovered the pre-Scratch kids' session, and where the subsequent trolling campaign was carried out. The meteor was also the location where Tavros, Vriska, Nepeta, Eridan, Feferi, Kanaya (temporarily), Sollux and Equius died.

Sollux brought the meteor to the Green Sun after its creation, where Dave, Rose, the Wayward Vagabond and Serenity joined its remaining crew.

Furthest Ring
The meteor, after receiving a psychic push from Sollux and Aradia, proceeds to journey through the dream bubbles of the Furthest Ring while en route to the post-Scratch kids' session, pursued by Jack Noir.

Possible Fate
It is heavily implied that the meteor is/will be located on post-scrath Earth, years in the future and practically confirmed that the cherubs Calliope and Caliborn reside in a room atop the tallest spire of it. The two of them have access to the computers stationed inside the room, which enables them look at previous pesterlogs from the trolls (which was HS 6547 (menioned) to Dirk by Caliborn). Calliope also seem to be in possession of Karkat's ~ATH book, as well as Rose's tome, which were both aboard the ship at the time the meteor-crew traveled to the post-sratch session. Like, she turned it into a colourful scrapbook.

Surrounding the meteor is a seemingly endless HS 7028 (wasteland) filled with JPEG-artifacted Statues of LibertyHS 7035 which might have been created by pre- or post-scratch Dave, as at least one of those statues was already present before the meteor arrivedHS 6773. Since the whole planet got sucked into Caliborn's session, it is safe to assume that the meteor is now located in the Incipisphere.

Ectobiology Lab
The trolls' equivalent to the Ectobiology Lab is found within the meteor. Karkat uses this room to create the trolls and their ancestors. In the Alterniabound Flashes, there were various images of lusus-like creatures and Carapacian figures suspended in tubes of fluid. It is unknown if these are located within the Ectobiology Lab or not.