Could Phobos Be Hollow?

Posted by StarryGift On Mar 20, 2009

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Saturday, March 6, 2010

Could Phobos Be Hollow?

id="attachment_58922" class="wp-caption aligncenter" style="width: 410px">href="http://www.universetoday.com/wp-content/uploads/2010/03/Phobos-mosaic.jpg">src="http://www.universetoday.com/wp-content/uploads/2010/03/Phobos-mosaic.jpg" alt="" title="A mosaic image of Phobos composed by 53 pictures. Credits: ESA/ DLR (S. Semm, M. W�hlisch, K.Willner)/ FU Berlin (G. Neukum)" width="400" height="200" class="size-full wp-image-58922" />class="wp-caption-text">A mosaic image of Phobos composed by 53 pictures. Credits: ESA/ DLR (S. Semm, M. W�hlisch, K.Willner)/ FU Berlin (G. Neukum)

Back in the 1950s and 1960s, there was some speculation that href="http://www.universetoday.com/guide-to-space/mars/mars-moons/" class="alinks_links" title="" rel="external">Mars moon href="http://www.universetoday.com/guide-to-space/mars/phobos/" class="alinks_links" title="" rel="external">Phobos could possibly href="http://en.wikipedia.org/wiki/Phobos_(moon)#.22Hollow_Phobos.22_suggestions">be hollow due to the its unusual orbital characteristics. While scientists now agree that the href="http://www.universetoday.com/guide-to-space/the-solar-system/moon/" class="alinks_links" title="" rel="external">moon is very likely not hollow, vast caverns may exist within href="http://www.universetoday.com/guide-to-space/the-moon/" class="alinks_links" title="" rel="external">the moon, and it might be a porous body instead of solid. The href="http://www.universetoday.com/guide-to-space/mars/" class="alinks_links" title="" rel="external">Mars Express spacecraft made a close href="http://www.universetoday.com/guide-to-space/spaceflight/flyby/" class="alinks_links" title="" rel="external">flyby of Phobos on Wednesday to help provide more data on the interior of Phobos, and all indications are the event was a big success. The spacecraft skimmed smoothly over the odd-shaped moon at just 67 km, the closest any manmade object has ever been. No images were taken from this flyby. Instead all the instruments were turned off so that ground stations could listen for a pure radio signal of how Phobos "tugged" on the spacecraft. Scientists say the data collected could help unlock the origin of Phobos and other ?second generation? href="http://www.universetoday.com/guide-to-space/the-solar-system/how-many-moons-are-in-the-solar-system/" class="alinks_links" title="" rel="external">moons./> (...)
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