File:221831main PIA10368.png

Beskrivelse[redigér]

Dette billede eller video er katalogiseret af Jet Propulsion Laboratory under National Aeronautics and Space Administration (NASA) ved foto ID: PIA10368. Denne tag indeholder og/eller påviser ingen ophavsretslige informationer eller kildeinformationer af dette medie. Rettigheder skal stadigvæk oplyses. Se Commons:Licensing for flere informationer. Andre sprog: العربية ∙ беларуская (тарашкевіца) ∙ български ∙ català ∙ čeština ∙ dansk ∙ Deutsch ∙ English ∙ español ∙ فارسی ∙ français ∙ galego ∙ magyar ∙ հայերեն ∙ Bahasa Indonesia ∙ italiano ∙ 日本語 ∙ македонски ∙ മലയാളം ∙ Nederlands ∙ polski ∙ português ∙ русский ∙ sicilianu ∙ slovenščina ∙ Türkçe ∙ українська ∙ 简体中文 ∙ 繁體中文 ∙ +/−

Downloaded from the NASA .tif source and converted to png with convert(1)

Original caption[redigér]

The High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter took two images of the larger of Mars' two moons, Phobos, within 10 minutes of each other on March 23, 2008. This is the first, taken from a distance of about 6,800 kilometers (about 4,200 miles). It is presented in color by combining data from the camera's blue-green, red, and near-infrared channels.

The illuminated part of Phobos seen in the images is about 21 kilometers (13 miles) across. The most prominent feature in the images is the large crater Stickney in the lower right. With a diameter of 9 kilometers (5.6 miles), it is the largest feature on Phobos.

The color data accentuate details not apparent in black-and-white images. For example, materials near the rim of Stickney appear bluer than the rest of Phobos. Based on analogy with materials on our own moon, this could mean this surface is fresher, and therefore younger, than other parts of Phobos.

A series of troughs and crater chains is obvious on other parts of the moon. Although many appear radial to Stickney in this image, recent studies from the European Space Agency's Mars Express orbiter indicate that they are not related to Stickney. Instead, they may have formed when material ejected from impacts on Mars later collided with Phobos. The lineated textures on the walls of Stickney and other large craters are landslides formed from materials falling into the crater interiors in the weak Phobos gravity (less than one one-thousandth of the gravity on Earth).

In the full-resolution version of this image, a pixel encompasses 6.8 meters (22 feet), providing a resolution (smallest visible feature) of about 20 meters (about 65 feet). The image is in the HiRISE catalog as PSP_007769_9010.

NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the Mars Reconnaissance Orbiter for NASA's Science Mission Directorate, Washington. Lockheed Martin Space Systems, Denver, is the prime contractor for the project and built the spacecraft. The High Resolution Imaging Science Experiment is operated by the University of Arizona, Tucson, and the instrument was built by Ball Aerospace & Technologies Corp., Boulder, Colo.

Licensering[redigér]

	Denne fil er i offentligt domæne i USA fordi den udelukkende er skabt af NASA. NASAs ophavsretspolitik erklærer at materiale udgivet af NASA ikke er omfattet af ophavsret medmindre andet er nævnt. (Se også Template:PD-USGov, NASAs ophavsretspolitik eller JPLs politik for brug af billeder.)
	Advarsler: Brug af NASAs logo, insignier and emblemer er begrænset under amerikansk lovgivning: 14 CFR 1221. NASAs websider hoster en omfattende mængde billeder fra det sovjetiske/russiske rumagentur, og andre ikke-amerikanske rumagenturer. Disse billeder er ikke nødvendigvis i offentligt domæne. Materiale baseret på data fra Hubble-teleskopet kan være omfattet af ophavsret, hvis de ikke udtrykkeligt er skabt af STScI.[1] Se også {{PD-Hubble}} og {{Cc-Hubble}}. Det fælles projekt SOHO (ESA & NASA) medfører at al materiale skabt af sonden er omfattet af ophavsret og kræver særlig tilladelse for kommerciel, ikke-oplysende brug. [2] Billeder fra websiden Astronomy Picture of the Day (APOD) kan være omfattet af ophavsret. [3] National Space Science Data Centers webside, vides at hoste ophavsretsligt beskyttet indhold. Deres fotogalleri FAQ erklærer at alle billeder i fotogalleriet er i offentligt domæne, "medmindre andet er nævnt."