NASA Administrator Charles Bolden speaks before Friday night's launch of the LADEE moon orbiter. The craft has run into a small technical issue, NASA says, which it will fix before it arrives at the moon next month. Carla Cioffi/NASA hide caption

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A computer image generated by NASA shows objects orbiting Earth, including those in geosynchronous orbit at a high altitude. The objects are not to scale. NASA hide caption

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This artist rendering provided by NASA shows Voyager 1 at the edge of the solar system. AP hide caption

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Has Voyager 1 Left The Solar System?

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A rendering of objects currently in Low Earth Orbit (not illustrated to scale). According to NASA, "approximately 95 percent of the objects in this illustration are orbital debris, i.e., not functional satellites." NASA hide caption

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In this rare image taken on July 19, 2013, the wide-angle camera on NASA's Cassini spacecraft has captured Saturn's rings and our planet Earth and its moon in the same frame. NASA/JPL-Caltech/Space Science Institute hide caption

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That little blue dot is how Earth will likely appear in a photo shot from a spacecraft that is studying Saturn. NASA/JPL-Caltech simulation hide caption

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