Neptune's moon Hippocamp, illustration

Numéro d’image : 12969115
Neptune's moon Hippocamp, illustration
Neptune's moon Hippocamp, illustration. This tiny moon (lower right) was discovered in 2013 by analysing Hubble Space Telescope images taken several years earlier. Only 32 kilometres across, it is thought to be a broken-off fragment from the much larger neighbouring moon, Proteus, seen as a crescent in the background. Neptune is at left. This is the first evidence for a moon being formed from a larger body following an impact. The impact took place billions of years ago, and Proteus has migrated outwards in its orbit since then, leaving Hippocamp behind. The two moons are around 12, 000 kilometres apart. Hippocamp's name when discovered was S/2004 N 1.
Licence : Droits gérés
Crédit: Science Photo Library / J. Olmsted (STScI) / ESA / NASA
Taille de l’image : 4200 px × 2400 px
Model Release : Non requis
Property Release : Non requis
Restrictions : -

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