---
title: "This Newly-Discovered Class of Galaxies Shouldn’t Exist"
description: "Unlike other galaxies, the new galaxies are more like clouds and are as big as our own Milky Way but with only about one percent of the stars. "
date: "2015-05-19"
modified: "2015-08-13"
authors:
  - name: "Ethan Fox"
    link: "https://futurism.com/authors/foxman"
url: "https://futurism.com/this-newly-discovered-class-of-galaxies-shouldnt-exist"
categories:
  - "Off-World"
  - "Space"
tags:
  - "space"
---

# This Newly-Discovered Class of Galaxies Shouldn’t Exist

![Default Futurism featured image](<https://futurism.com/wp-content/uploads/2025/10/Futurism-Filler-Image.jpg>)

- Astronomers are calling them ultra diffuse galaxies. Given what we know about galaxy formation, these galaxies shouldn’t exist at all.
- "It’s remarkable they have survived at all. They are found in a dense, violent region of space filled with dark matter and galaxies whizzing around, so we think they must be cloaked in their own invisible dark matter ‘shields’ that are protecting them from this intergalactic assault.”
- "If there are any aliens living on a planet in an ultra-diffuse galaxy, they would have no band of light across the sky, like our own Milky Way, to tell them they were living in a galaxy. The night sky would be much emptier of stars."