S-2004 N1 Hubble montage

Forfatter/Opretter:

NASA, ESA, and M. Showalter (SETI Institute)

Kredit:

http://hubblesite.org/newscenter/archive/releases/2013/30/image/a/

Shortlink:

https://dkwiki.dk/b/22f86

kilde:

Wikimedia Commons

størrelse:

3000 x 2400 Pixel (617217 Bytes)

beskrivelse:

This composite Hubble Space Telescope picture shows the location of a newly discovered moon, designated S/2004 N 1, orbiting the giant planet Neptune. The moon is so small (no more than 12 miles across) and dim, it was missed by NASA's Voyager 2 spacecraft cameras when the probe flew by Neptune in 1989. Several other moons that were discovered by Voyager appear in this 2009 image, along with a circumplanetary structure known as ring arcs.
Mark Showalter of the SETI Institute discovered S/2004 N 1 in July 2013. He analyzed over 150 archival Neptune photographs taken by Hubble from 2004 to 2009. The same white dot appeared over and over again. He then plotted a circular orbit for the moon, which completes one revolution around Neptune every 23 hours. The black-and-white image was taken in 2009 with Hubble's Wide Field Camera 3 in visible light. Hubble took the color inset of Neptune on August 19, 2009.

Licens:

Public domain