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File:Pluto moon P5 discovery with moons' orbits.jpg

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English: This image, taken by NASA's Hubble Space Telescope, shows five moons orbiting the distant, icy dwarf planet Pluto. The newly discovered small moon, Styx (initially designated P5), is the innermost of the moons found by Hubble over the past seven years. The diagram shows that Styx is in a 58,000-mile-diameter circular orbit around Pluto that is assumed to be co-planar with the other satellites in the system. Though Charon (discovered in 1978) is an even closer moon to Pluto, some astronomers consider the Pluto-Charon pair a "double planet" because Charon's mass is 12 percent of Pluto's mass (by comparison, our Moon is 1.2 percent Earth's mass). This image was taken with Hubble's Wide Field Camera 3 on July 7. Other observations that collectively show the moon's orbital motion were taken on June 26, 27, and 29, 2012 and July 9, 2012. The new data will help scientists in their planning for the July 2015 flyby of Pluto by NASA's New Horizons spacecraft.

The original NASA image has been modified by replacing "P4" and "P5" with newer designations "Kerberos" and "Styx", respectively.
日期
來源 http://hubblesite.org/newscenter/archive/releases/2012/32/image/c/
作者 NASA, ESA, and L. Frattare (STScI)

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Public domain 本作品由NASA創作,屬於公有領域。根據NASA的版權政策:“NASA的創作除非另有聲明否則不受版權保護。”(參見:Template:PD-USGov/zhNASA版權政策JPL圖像使用政策
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目前2013年7月3日 (三) 05:48於 2013年7月3日 (三) 05:48 版本的縮圖1,546 × 1,578(1,021 KB)WolfmanSFupdate to include newly approved names of moons: Styx and Kerberos
2012年7月17日 (二) 05:03於 2012年7月17日 (二) 05:03 版本的縮圖1,546 × 1,578(661 KB)WolfmanSF

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