Observation
4 posts
Crab Nebula
Photograph (Hubble + Chandra composite) · NASA / ESA / Hubble Space Telescope
The Crab Nebula (M1, NGC 1952) is the remains of a supernova explosion observed by Chinese astronomers in 1054 CE. The supernova was bright enough to be visible in daylight for 23 days; Chinese, Japan
Saturn (Cassini)
Photograph (Cassini-Huygens mission) · NASA / JPL / Cassini Imaging Team
This composite photograph of Saturn was assembled from images taken by the Cassini orbiter on 19 July 2013, a single frame from the spacecraft's 13-year mission orbiting the planet (2004-2017). The or
Hubble Ultra Deep Field
Photograph (deep-field astronomical exposure) · NASA / ESA / Hubble Space Telescope
Released in 2004, the Hubble Ultra Deep Field is the deepest visible-light image of the universe ever taken at the time of its publication. A composite of 800 exposures totaling 11.3 days of telescope
Andromeda Galaxy (Messier 31)
Astronomical photograph · Anonymous astrophotographer (CC0 public domain), 2025
The Andromeda Galaxy is the most distant object visible to the unaided human eye. Under dark skies, away from city lights, it appears as a fuzzy oval patch in the constellation Andromeda, slightly elo
