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The Swift Spacecraft
5 min read

Swift launched into orbit on Nov. 20, 2004, as NASA’s Swift Gamma-ray Observatory. In 2018, NASA renamed the spacecraft in…

Apr 23, 2025
Mission
Survey of Andromeda’s Satellite Galaxies
1 min read

This is a wide-angle view of the distribution of known satellite galaxies orbiting the large Andromeda galaxy (M31), located 2.5…

Feb 27, 2025
Image
The Distribution of Satellite Galaxies around M31
1 min read

This animation begins with a view of the neighboring Andromeda galaxy. We zoom through a scattering of foreground stars and…

Feb 27, 2025
Video
Hubble M31 PHAT+PHAST Mosaic
1 min read

This is the largest photomosaic ever assembled from Hubble Space Telescope observations. It is a panoramic view of the neighboring…

Jan 16, 2025
Image
Compass and Scale Image of M31 PHAT+PHAST Mosaic
1 min read

This is the largest photomosaic ever made by the Hubble Space Telescope. The target is the vast Andromeda galaxy that…

Jan 16, 2025
Image
Andromeda M31 PHAST Mosaic Video
1 min read

This video opens with the largest photomosaic ever assembled from Hubble Space Telescope observations. It is a panoramic view of…

Jan 16, 2025
Video
NASA’s Hubble Traces Hidden History of Andromeda Galaxy
6 min read

In the years following the launch of NASA’s Hubble Space Telescope, astronomers have tallied over 1 trillion galaxies in the…

Jan 16, 2025
Article
M31 Cepheid Variable Star V1
1 min read

In commemoration of Edwin Hubble's discovery of a Cepheid variable class star, called V1, in the neighboring Andromeda galaxy 100…

Jan 15, 2025
Image
Cepheid Variable Star V1 in Andromeda Galaxy
1 min read

In commemoration of Edwin Hubble's discovery of a Cepheid variable class star, called V1, in the neighboring Andromeda galaxy 100…

Jan 15, 2025
Image